<?xml version="1.0" encoding="UTF-8" ?>
<XMLDB PATH="lib/db" VERSION="20090904" COMMENT="XMLDB file for core Moodle tables"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="../../lib/xmldb/xmldb.xsd"
>
  <TABLES>
    <TABLE NAME="config" COMMENT="Moodle configuration variables" NEXT="config_plugins">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="value"/>
        <FIELD NAME="value" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="name"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="name"/>
        <KEY NAME="name" TYPE="unique" FIELDS="name" PREVIOUS="primary"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="config_plugins" COMMENT="Moodle modules and plugins configuration variables" PREVIOUS="config" NEXT="course">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="plugin"/>
        <FIELD NAME="plugin" TYPE="char" LENGTH="100" NOTNULL="true" DEFAULT="core" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="plugin" NEXT="value"/>
        <FIELD NAME="value" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="name"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="plugin_name"/>
        <KEY NAME="plugin_name" TYPE="unique" FIELDS="plugin, name" PREVIOUS="primary"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="course" COMMENT="Central course table" PREVIOUS="config_plugins" NEXT="course_categories">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="category"/>
        <FIELD NAME="category" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="sortorder"/>
        <FIELD NAME="sortorder" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="category" NEXT="password"/>
        <FIELD NAME="password" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="sortorder" NEXT="fullname"/>
        <FIELD NAME="fullname" TYPE="char" LENGTH="254" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="password" NEXT="shortname"/>
        <FIELD NAME="shortname" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="fullname" NEXT="idnumber"/>
        <FIELD NAME="idnumber" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="shortname" NEXT="summary"/>
        <FIELD NAME="summary" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="idnumber" NEXT="format"/>
        <FIELD NAME="format" TYPE="char" LENGTH="10" NOTNULL="true" DEFAULT="topics" SEQUENCE="false" ENUM="false" PREVIOUS="summary" NEXT="showgrades"/>
        <FIELD NAME="showgrades" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="format" NEXT="modinfo"/>
        <FIELD NAME="modinfo" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="showgrades" NEXT="newsitems"/>
        <FIELD NAME="newsitems" TYPE="int" LENGTH="5" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="modinfo" NEXT="teacher"/>
        <FIELD NAME="teacher" TYPE="char" LENGTH="100" NOTNULL="true" DEFAULT="Teacher" SEQUENCE="false" ENUM="false" PREVIOUS="newsitems" NEXT="teachers"/>
        <FIELD NAME="teachers" TYPE="char" LENGTH="100" NOTNULL="true" DEFAULT="Teachers" SEQUENCE="false" ENUM="false" PREVIOUS="teacher" NEXT="student"/>
        <FIELD NAME="student" TYPE="char" LENGTH="100" NOTNULL="true" DEFAULT="Student" SEQUENCE="false" ENUM="false" PREVIOUS="teachers" NEXT="students"/>
        <FIELD NAME="students" TYPE="char" LENGTH="100" NOTNULL="true" DEFAULT="Students" SEQUENCE="false" ENUM="false" PREVIOUS="student" NEXT="guest"/>
        <FIELD NAME="guest" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="students" NEXT="startdate"/>
        <FIELD NAME="startdate" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="guest" NEXT="enrolperiod"/>
        <FIELD NAME="enrolperiod" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="startdate" NEXT="numsections"/>
        <FIELD NAME="numsections" TYPE="int" LENGTH="5" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="enrolperiod" NEXT="marker"/>
        <FIELD NAME="marker" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="numsections" NEXT="maxbytes"/>
        <FIELD NAME="maxbytes" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="marker" NEXT="showreports"/>
        <FIELD NAME="showreports" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="maxbytes" NEXT="visible"/>
        <FIELD NAME="visible" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="showreports" NEXT="hiddensections"/>
        <FIELD NAME="hiddensections" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="visible" NEXT="groupmode"/>
        <FIELD NAME="groupmode" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="hiddensections" NEXT="groupmodeforce"/>
        <FIELD NAME="groupmodeforce" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="groupmode" NEXT="defaultgroupingid"/>
        <FIELD NAME="defaultgroupingid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="default grouping used in course modules, does not have key intentionally" PREVIOUS="groupmodeforce" NEXT="lang"/>
        <FIELD NAME="lang" TYPE="char" LENGTH="30" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="defaultgroupingid" NEXT="theme"/>
        <FIELD NAME="theme" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="lang" NEXT="cost"/>
        <FIELD NAME="cost" TYPE="char" LENGTH="10" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="theme" NEXT="currency"/>
        <FIELD NAME="currency" TYPE="char" LENGTH="3" NOTNULL="true" DEFAULT="USD" SEQUENCE="false" ENUM="false" PREVIOUS="cost" NEXT="timecreated"/>
        <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="currency" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timecreated" NEXT="metacourse"/>
        <FIELD NAME="metacourse" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timemodified" NEXT="requested"/>
        <FIELD NAME="requested" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="metacourse" NEXT="restrictmodules"/>
        <FIELD NAME="restrictmodules" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="requested" NEXT="expirynotify"/>
        <FIELD NAME="expirynotify" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="restrictmodules" NEXT="expirythreshold"/>
        <FIELD NAME="expirythreshold" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="expirynotify" NEXT="notifystudents"/>
        <FIELD NAME="notifystudents" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="expirythreshold" NEXT="enrollable"/>
        <FIELD NAME="enrollable" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="notifystudents" NEXT="enrolstartdate"/>
        <FIELD NAME="enrolstartdate" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="enrollable" NEXT="enrolenddate"/>
        <FIELD NAME="enrolenddate" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="enrolstartdate" NEXT="enrol"/>
        <FIELD NAME="enrol" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="enrolenddate" NEXT="defaultrole"/>
        <FIELD NAME="defaultrole" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="The default role given to participants who self-enrol" PREVIOUS="enrol"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="category" UNIQUE="false" FIELDS="category" NEXT="idnumber"/>
        <INDEX NAME="idnumber" UNIQUE="false" FIELDS="idnumber" PREVIOUS="category" NEXT="shortname"/>
        <INDEX NAME="shortname" UNIQUE="false" FIELDS="shortname" PREVIOUS="idnumber"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="course_categories" COMMENT="Course categories" PREVIOUS="course" NEXT="course_display">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="description"/>
        <FIELD NAME="description" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="parent"/>
        <FIELD NAME="parent" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="description" NEXT="sortorder"/>
        <FIELD NAME="sortorder" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="parent" NEXT="coursecount"/>
        <FIELD NAME="coursecount" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="sortorder" NEXT="visible"/>
        <FIELD NAME="visible" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="false" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="coursecount" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="visible" NEXT="depth"/>
        <FIELD NAME="depth" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timemodified" NEXT="path"/>
        <FIELD NAME="path" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="depth" NEXT="theme"/>
        <FIELD NAME="theme" TYPE="char" LENGTH="50" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="Theme for the category" PREVIOUS="path"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="parent"/>
        <KEY NAME="parent" TYPE="foreign" FIELDS="parent" REFTABLE="course_categories" REFFIELDS="id" COMMENT="note that to make this recursive FK working someday, the parent field must be declared NULL" PREVIOUS="primary"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="course_display" COMMENT="Stores info about how to display the course" PREVIOUS="course_categories" NEXT="course_meta">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="course"/>
        <FIELD NAME="course" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="course" NEXT="display"/>
        <FIELD NAME="display" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="userid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="course_userid" UNIQUE="false" FIELDS="course, userid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="course_meta" COMMENT="to store meta-courses relations" PREVIOUS="course_display" NEXT="course_modules">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="parent_course"/>
        <FIELD NAME="parent_course" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="child_course"/>
        <FIELD NAME="child_course" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="parent_course"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="parent_course" UNIQUE="false" FIELDS="parent_course" NEXT="child_course"/>
        <INDEX NAME="child_course" UNIQUE="false" FIELDS="child_course" PREVIOUS="parent_course"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="course_modules" COMMENT="course_modules table retrofitted from MySQL" PREVIOUS="course_meta" NEXT="course_sections">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="course"/>
        <FIELD NAME="course" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="module"/>
        <FIELD NAME="module" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="course" NEXT="instance"/>
        <FIELD NAME="instance" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="module" NEXT="section"/>
        <FIELD NAME="section" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="instance" NEXT="idnumber"/>
        <FIELD NAME="idnumber" TYPE="char" LENGTH="100" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="customizable idnumber" PREVIOUS="section" NEXT="added"/>
        <FIELD NAME="added" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="idnumber" NEXT="score"/>
        <FIELD NAME="score" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="added" NEXT="indent"/>
        <FIELD NAME="indent" TYPE="int" LENGTH="5" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="score" NEXT="visible"/>
        <FIELD NAME="visible" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="false" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="indent" NEXT="visibleold"/>
        <FIELD NAME="visibleold" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="false" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="visible" NEXT="groupmode"/>
        <FIELD NAME="groupmode" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="visibleold" NEXT="groupingid"/>
        <FIELD NAME="groupingid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="groupmode" NEXT="groupmembersonly"/>
        <FIELD NAME="groupmembersonly" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="only members of any group are allowed to access the activity" PREVIOUS="groupingid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="groupingid"/>
        <KEY NAME="groupingid" TYPE="foreign" FIELDS="groupingid" REFTABLE="groupings" REFFIELDS="id" PREVIOUS="primary"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="visible" UNIQUE="false" FIELDS="visible" NEXT="course"/>
        <INDEX NAME="course" UNIQUE="false" FIELDS="course" PREVIOUS="visible" NEXT="module"/>
        <INDEX NAME="module" UNIQUE="false" FIELDS="module" PREVIOUS="course" NEXT="instance"/>
        <INDEX NAME="instance" UNIQUE="false" FIELDS="instance" PREVIOUS="module" NEXT="idnumber-course"/>
        <INDEX NAME="idnumber-course" UNIQUE="false" FIELDS="idnumber, course" COMMENT="non unique index (although programatically we are guarantying some sort of uniqueness both under this table and the grade_items one). TODO: We need a central store of module idnumbers in the future." PREVIOUS="instance"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="course_sections" COMMENT="to define the sections for each course" PREVIOUS="course_modules" NEXT="course_request">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="course"/>
        <FIELD NAME="course" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="section"/>
        <FIELD NAME="section" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="course" NEXT="summary"/>
        <FIELD NAME="summary" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="section" NEXT="sequence"/>
        <FIELD NAME="sequence" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="summary" NEXT="visible"/>
        <FIELD NAME="visible" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="false" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="sequence"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="course_section" UNIQUE="false" FIELDS="course, section"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="course_request" COMMENT="course requests" PREVIOUS="course_sections" NEXT="course_allowed_modules">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="fullname"/>
        <FIELD NAME="fullname" TYPE="char" LENGTH="254" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="shortname"/>
        <FIELD NAME="shortname" TYPE="char" LENGTH="15" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="fullname" NEXT="summary"/>
        <FIELD NAME="summary" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="shortname" NEXT="reason"/>
        <FIELD NAME="reason" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="summary" NEXT="requester"/>
        <FIELD NAME="requester" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="reason" NEXT="password"/>
        <FIELD NAME="password" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="requester"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="shortname" UNIQUE="false" FIELDS="shortname"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="course_allowed_modules" COMMENT="allowed modules foreach course" PREVIOUS="course_request" NEXT="event">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="course"/>
        <FIELD NAME="course" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="module"/>
        <FIELD NAME="module" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="course"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="course" UNIQUE="false" FIELDS="course" NEXT="module"/>
        <INDEX NAME="module" UNIQUE="false" FIELDS="module" PREVIOUS="course"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="event" COMMENT="For everything with a time associated to it" PREVIOUS="course_allowed_modules" NEXT="cache_filters">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="description"/>
        <FIELD NAME="description" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="format"/>
        <FIELD NAME="format" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="description" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="format" NEXT="groupid"/>
        <FIELD NAME="groupid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="courseid" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="groupid" NEXT="repeatid"/>
        <FIELD NAME="repeatid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="modulename"/>
        <FIELD NAME="modulename" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="repeatid" NEXT="instance"/>
        <FIELD NAME="instance" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="modulename" NEXT="eventtype"/>
        <FIELD NAME="eventtype" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="instance" NEXT="timestart"/>
        <FIELD NAME="timestart" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="eventtype" NEXT="timeduration"/>
        <FIELD NAME="timeduration" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timestart" NEXT="visible"/>
        <FIELD NAME="visible" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="false" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="timeduration" NEXT="uuid"/>
        <FIELD NAME="uuid" TYPE="char" LENGTH="36" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="visible" NEXT="sequence"/>
        <FIELD NAME="sequence" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="uuid" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="sequence"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="courseid" UNIQUE="false" FIELDS="courseid" NEXT="userid"/>
        <INDEX NAME="userid" UNIQUE="false" FIELDS="userid" PREVIOUS="courseid" NEXT="timestart"/>
        <INDEX NAME="timestart" UNIQUE="false" FIELDS="timestart" PREVIOUS="userid" NEXT="timeduration"/>
        <INDEX NAME="timeduration" UNIQUE="false" FIELDS="timeduration" PREVIOUS="timestart" NEXT="groupid-courseid-visible-userid"/>
        <INDEX NAME="groupid-courseid-visible-userid" UNIQUE="false" FIELDS="groupid, courseid, visible, userid" COMMENT="used for calendar view" PREVIOUS="timeduration"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="cache_filters" COMMENT="For keeping information about cached data" PREVIOUS="event" NEXT="cache_text">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="filter"/>
        <FIELD NAME="filter" TYPE="char" LENGTH="32" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="version"/>
        <FIELD NAME="version" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="filter" NEXT="md5key"/>
        <FIELD NAME="md5key" TYPE="char" LENGTH="32" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="version" NEXT="rawtext"/>
        <FIELD NAME="rawtext" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="md5key" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="rawtext"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="filter_md5key" UNIQUE="false" FIELDS="filter, md5key"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="cache_text" COMMENT="For storing temporary copies of processed texts" PREVIOUS="cache_filters" NEXT="log">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="md5key"/>
        <FIELD NAME="md5key" TYPE="char" LENGTH="32" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="formattedtext"/>
        <FIELD NAME="formattedtext" TYPE="text" LENGTH="big" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="md5key" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="formattedtext"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="md5key" UNIQUE="false" FIELDS="md5key" NEXT="timemodified"/>
        <INDEX NAME="timemodified" UNIQUE="false" FIELDS="timemodified" COMMENT="Mainly to help deletion of expired records from cron" PREVIOUS="md5key"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="log" COMMENT="Every action is logged as far as possible" PREVIOUS="cache_text" NEXT="log_display">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="time"/>
        <FIELD NAME="time" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="time" NEXT="ip"/>
        <FIELD NAME="ip" TYPE="char" LENGTH="15" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="course"/>
        <FIELD NAME="course" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="ip" NEXT="module"/>
        <FIELD NAME="module" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="course" NEXT="cmid"/>
        <FIELD NAME="cmid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="module" NEXT="action"/>
        <FIELD NAME="action" TYPE="char" LENGTH="40" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="cmid" NEXT="url"/>
        <FIELD NAME="url" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="action" NEXT="info"/>
        <FIELD NAME="info" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="url"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="course-module-action" UNIQUE="false" FIELDS="course, module, action" NEXT="time"/>
        <INDEX NAME="time" UNIQUE="false" FIELDS="time" PREVIOUS="course-module-action" NEXT="action"/>
        <INDEX NAME="action" UNIQUE="false" FIELDS="action" PREVIOUS="time" NEXT="userid-course"/>
        <INDEX NAME="userid-course" UNIQUE="false" FIELDS="userid, course" PREVIOUS="action" NEXT="cmid"/>
        <INDEX NAME="cmid" UNIQUE="false" FIELDS="cmid" PREVIOUS="userid-course"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="log_display" COMMENT="For a particular module/action, specifies a moodle table/field" PREVIOUS="log" NEXT="message">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="module"/>
        <FIELD NAME="module" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="action"/>
        <FIELD NAME="action" TYPE="char" LENGTH="40" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="module" NEXT="mtable"/>
        <FIELD NAME="mtable" TYPE="char" LENGTH="30" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="action" NEXT="field"/>
        <FIELD NAME="field" TYPE="char" LENGTH="200" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="mtable"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="module-action" UNIQUE="true" FIELDS="module, action"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="message" COMMENT="Stores all unread messages" PREVIOUS="log_display" NEXT="message_read">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="useridfrom"/>
        <FIELD NAME="useridfrom" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="useridto"/>
        <FIELD NAME="useridto" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="useridfrom" NEXT="message"/>
        <FIELD NAME="message" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="useridto" NEXT="format"/>
        <FIELD NAME="format" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="message" NEXT="timecreated"/>
        <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="format" NEXT="messagetype"/>
        <FIELD NAME="messagetype" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="timecreated"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="useridfrom" UNIQUE="false" FIELDS="useridfrom" NEXT="useridto"/>
        <INDEX NAME="useridto" UNIQUE="false" FIELDS="useridto" PREVIOUS="useridfrom"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="message_read" COMMENT="Stores all messages that have been read" PREVIOUS="message" NEXT="message_contacts">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="useridfrom"/>
        <FIELD NAME="useridfrom" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="useridto"/>
        <FIELD NAME="useridto" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="useridfrom" NEXT="message"/>
        <FIELD NAME="message" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="useridto" NEXT="format"/>
        <FIELD NAME="format" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="message" NEXT="timecreated"/>
        <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="format" NEXT="timeread"/>
        <FIELD NAME="timeread" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timecreated" NEXT="messagetype"/>
        <FIELD NAME="messagetype" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="timeread" NEXT="mailed"/>
        <FIELD NAME="mailed" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="messagetype"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="useridfrom" UNIQUE="false" FIELDS="useridfrom" NEXT="useridto"/>
        <INDEX NAME="useridto" UNIQUE="false" FIELDS="useridto" PREVIOUS="useridfrom"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="message_contacts" COMMENT="Maintains lists of relationships between users" PREVIOUS="message_read" NEXT="modules">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="contactid"/>
        <FIELD NAME="contactid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="blocked"/>
        <FIELD NAME="blocked" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="contactid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="userid-contactid" UNIQUE="true" FIELDS="userid, contactid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="modules" COMMENT="modules available in the site" PREVIOUS="message_contacts" NEXT="sessions2">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="version"/>
        <FIELD NAME="version" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="cron"/>
        <FIELD NAME="cron" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="version" NEXT="lastcron"/>
        <FIELD NAME="lastcron" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="cron" NEXT="search"/>
        <FIELD NAME="search" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="lastcron" NEXT="visible"/>
        <FIELD NAME="visible" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="false" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="search"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="name" UNIQUE="false" FIELDS="name"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="sessions2" COMMENT="Optional database session storage in new format, not used by default" PREVIOUS="modules" NEXT="adodb_logsql">
      <FIELDS>
        <FIELD NAME="sesskey" TYPE="char" LENGTH="64" NOTNULL="true" SEQUENCE="false" ENUM="false" NEXT="expiry"/>
        <FIELD NAME="expiry" TYPE="datetime" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="sesskey" NEXT="expireref"/>
        <FIELD NAME="expireref" TYPE="char" LENGTH="250" NOTNULL="false" DEFAULT="" SEQUENCE="false" ENUM="false" PREVIOUS="expiry" NEXT="created"/>
        <FIELD NAME="created" TYPE="datetime" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="expireref" NEXT="modified"/>
        <FIELD NAME="modified" TYPE="datetime" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="created" NEXT="sessdata"/>
        <FIELD NAME="sessdata" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="modified"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="sesskey"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="expiry" UNIQUE="false" FIELDS="expiry" NEXT="expireref"/>
        <INDEX NAME="expireref" UNIQUE="false" FIELDS="expireref" PREVIOUS="expiry"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="adodb_logsql" COMMENT="to save some logs from ADOdb" PREVIOUS="sessions2" NEXT="timezone">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="created"/>
        <FIELD NAME="created" TYPE="datetime" LENGTH="2" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="sql0"/>
        <FIELD NAME="sql0" TYPE="char" LENGTH="250" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="created" NEXT="sql1"/>
        <FIELD NAME="sql1" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="sql0" NEXT="params"/>
        <FIELD NAME="params" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="sql1" NEXT="tracer"/>
        <FIELD NAME="tracer" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="params" NEXT="timer"/>
        <FIELD NAME="timer" TYPE="number" LENGTH="16" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" DECIMALS="6" PREVIOUS="tracer"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="timezone" COMMENT="Rules for calculating local wall clock time for users" PREVIOUS="adodb_logsql" NEXT="user">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="year"/>
        <FIELD NAME="year" TYPE="int" LENGTH="11" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="tzrule"/>
        <FIELD NAME="tzrule" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="year" NEXT="gmtoff"/>
        <FIELD NAME="gmtoff" TYPE="int" LENGTH="11" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="tzrule" NEXT="dstoff"/>
        <FIELD NAME="dstoff" TYPE="int" LENGTH="11" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="gmtoff" NEXT="dst_month"/>
        <FIELD NAME="dst_month" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="dstoff" NEXT="dst_startday"/>
        <FIELD NAME="dst_startday" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="dst_month" NEXT="dst_weekday"/>
        <FIELD NAME="dst_weekday" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="dst_startday" NEXT="dst_skipweeks"/>
        <FIELD NAME="dst_skipweeks" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="dst_weekday" NEXT="dst_time"/>
        <FIELD NAME="dst_time" TYPE="char" LENGTH="6" NOTNULL="true" DEFAULT="00:00" SEQUENCE="false" ENUM="false" PREVIOUS="dst_skipweeks" NEXT="std_month"/>
        <FIELD NAME="std_month" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="dst_time" NEXT="std_startday"/>
        <FIELD NAME="std_startday" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="std_month" NEXT="std_weekday"/>
        <FIELD NAME="std_weekday" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="std_startday" NEXT="std_skipweeks"/>
        <FIELD NAME="std_skipweeks" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="std_weekday" NEXT="std_time"/>
        <FIELD NAME="std_time" TYPE="char" LENGTH="6" NOTNULL="true" DEFAULT="00:00" SEQUENCE="false" ENUM="false" PREVIOUS="std_skipweeks"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="user" COMMENT="One record for each person" PREVIOUS="timezone" NEXT="user_preferences">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="auth"/>
        <FIELD NAME="auth" TYPE="char" LENGTH="20" NOTNULL="true" DEFAULT="manual" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="confirmed"/>
        <FIELD NAME="confirmed" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="auth" NEXT="policyagreed"/>
        <FIELD NAME="policyagreed" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="confirmed" NEXT="deleted"/>
        <FIELD NAME="deleted" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="policyagreed" NEXT="mnethostid"/>
        <FIELD NAME="mnethostid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="deleted" NEXT="username"/>
        <FIELD NAME="username" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="mnethostid" NEXT="password"/>
        <FIELD NAME="password" TYPE="char" LENGTH="32" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="username" NEXT="idnumber"/>
        <FIELD NAME="idnumber" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="password" NEXT="firstname"/>
        <FIELD NAME="firstname" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="idnumber" NEXT="lastname"/>
        <FIELD NAME="lastname" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="firstname" NEXT="email"/>
        <FIELD NAME="email" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="lastname" NEXT="emailstop"/>
        <FIELD NAME="emailstop" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="email" NEXT="icq"/>
        <FIELD NAME="icq" TYPE="char" LENGTH="15" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="emailstop" NEXT="skype"/>
        <FIELD NAME="skype" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="icq" NEXT="yahoo"/>
        <FIELD NAME="yahoo" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="skype" NEXT="aim"/>
        <FIELD NAME="aim" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="yahoo" NEXT="msn"/>
        <FIELD NAME="msn" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="aim" NEXT="phone1"/>
        <FIELD NAME="phone1" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="msn" NEXT="phone2"/>
        <FIELD NAME="phone2" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="phone1" NEXT="institution"/>
        <FIELD NAME="institution" TYPE="char" LENGTH="40" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="phone2" NEXT="department"/>
        <FIELD NAME="department" TYPE="char" LENGTH="30" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="institution" NEXT="address"/>
        <FIELD NAME="address" TYPE="char" LENGTH="70" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="department" NEXT="city"/>
        <FIELD NAME="city" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="address" NEXT="country"/>
        <FIELD NAME="country" TYPE="char" LENGTH="2" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="city" NEXT="lang"/>
        <FIELD NAME="lang" TYPE="char" LENGTH="30" NOTNULL="true" DEFAULT="en_utf8" SEQUENCE="false" ENUM="false" PREVIOUS="country" NEXT="theme"/>
        <FIELD NAME="theme" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="lang" NEXT="timezone"/>
        <FIELD NAME="timezone" TYPE="char" LENGTH="100" NOTNULL="true" DEFAULT="99" SEQUENCE="false" ENUM="false" PREVIOUS="theme" NEXT="firstaccess"/>
        <FIELD NAME="firstaccess" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timezone" NEXT="lastaccess"/>
        <FIELD NAME="lastaccess" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="firstaccess" NEXT="lastlogin"/>
        <FIELD NAME="lastlogin" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="lastaccess" NEXT="currentlogin"/>
        <FIELD NAME="currentlogin" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="lastlogin" NEXT="lastip"/>
        <FIELD NAME="lastip" TYPE="char" LENGTH="15" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="currentlogin" NEXT="secret"/>
        <FIELD NAME="secret" TYPE="char" LENGTH="15" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="lastip" NEXT="picture"/>
        <FIELD NAME="picture" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="secret" NEXT="url"/>
        <FIELD NAME="url" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="picture" NEXT="description"/>
        <FIELD NAME="description" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="url" NEXT="mailformat"/>
        <FIELD NAME="mailformat" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="description" NEXT="maildigest"/>
        <FIELD NAME="maildigest" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="mailformat" NEXT="maildisplay"/>
        <FIELD NAME="maildisplay" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="true" DEFAULT="2" SEQUENCE="false" ENUM="false" PREVIOUS="maildigest" NEXT="htmleditor"/>
        <FIELD NAME="htmleditor" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="maildisplay" NEXT="ajax"/>
        <FIELD NAME="ajax" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="htmleditor" NEXT="autosubscribe"/>
        <FIELD NAME="autosubscribe" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="ajax" NEXT="trackforums"/>
        <FIELD NAME="trackforums" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="autosubscribe" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="trackforums" NEXT="trustbitmask"/>
        <FIELD NAME="trustbitmask" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timemodified" NEXT="imagealt"/>
        <FIELD NAME="imagealt" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="alt tag for user uploaded image" PREVIOUS="trustbitmask" NEXT="screenreader"/>
        <FIELD NAME="screenreader" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="flag for determining whehter the user uses a screenreader." PREVIOUS="imagealt"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="username" UNIQUE="true" FIELDS="mnethostid, username" NEXT="deleted"/>
        <INDEX NAME="deleted" UNIQUE="false" FIELDS="deleted" PREVIOUS="username" NEXT="confirmed"/>
        <INDEX NAME="confirmed" UNIQUE="false" FIELDS="confirmed" PREVIOUS="deleted" NEXT="firstname"/>
        <INDEX NAME="firstname" UNIQUE="false" FIELDS="firstname" PREVIOUS="confirmed" NEXT="lastname"/>
        <INDEX NAME="lastname" UNIQUE="false" FIELDS="lastname" PREVIOUS="firstname" NEXT="city"/>
        <INDEX NAME="city" UNIQUE="false" FIELDS="city" PREVIOUS="lastname" NEXT="country"/>
        <INDEX NAME="country" UNIQUE="false" FIELDS="country" PREVIOUS="city" NEXT="lastaccess"/>
        <INDEX NAME="lastaccess" UNIQUE="false" FIELDS="lastaccess" PREVIOUS="country" NEXT="email"/>
        <INDEX NAME="email" UNIQUE="false" FIELDS="email" PREVIOUS="lastaccess" NEXT="auth"/>
        <INDEX NAME="auth" UNIQUE="false" FIELDS="auth" PREVIOUS="email" NEXT="idnumber"/>
        <INDEX NAME="idnumber" UNIQUE="false" FIELDS="idnumber" PREVIOUS="auth"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="user_preferences" COMMENT="Allows modules to store arbitrary user preferences" PREVIOUS="user" NEXT="user_lastaccess">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="value"/>
        <FIELD NAME="value" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="name"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="userid-name" UNIQUE="true" FIELDS="userid, name"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="user_lastaccess" COMMENT="To keep track of course page access times, used in online participants block, and participants list" PREVIOUS="user_preferences" NEXT="scale">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="timeaccess"/>
        <FIELD NAME="timeaccess" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="courseid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="userid-courseid" UNIQUE="true" FIELDS="userid, courseid" NEXT="userid"/>
        <INDEX NAME="userid" UNIQUE="false" FIELDS="userid" PREVIOUS="userid-courseid" NEXT="courseid"/>
        <INDEX NAME="courseid" UNIQUE="false" FIELDS="courseid" PREVIOUS="userid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="scale" COMMENT="Defines grading scales" PREVIOUS="user_lastaccess" NEXT="scale_history">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="courseid" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="scale"/>
        <FIELD NAME="scale" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="description"/>
        <FIELD NAME="description" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="scale" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="description"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="courseid" UNIQUE="false" FIELDS="courseid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="scale_history" COMMENT="History table" PREVIOUS="scale" NEXT="stats_daily">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="action"/>
        <FIELD NAME="action" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="created/modified/deleted constants" PREVIOUS="id" NEXT="oldid"/>
        <FIELD NAME="oldid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="action" NEXT="source"/>
        <FIELD NAME="source" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="What caused the modification? manual/module/import/..." PREVIOUS="oldid" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The last time this grade_item was modified" PREVIOUS="source" NEXT="loggeduser"/>
        <FIELD NAME="loggeduser" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="the userid of the person who last modified this outcome" PREVIOUS="timemodified" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="loggeduser" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="courseid" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="scale"/>
        <FIELD NAME="scale" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="description"/>
        <FIELD NAME="description" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="scale"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="oldid"/>
        <KEY NAME="oldid" TYPE="foreign" FIELDS="oldid" REFTABLE="scale" REFFIELDS="id" PREVIOUS="primary" NEXT="courseid"/>
        <KEY NAME="courseid" TYPE="foreign" FIELDS="courseid" REFTABLE="course" REFFIELDS="id" PREVIOUS="oldid" NEXT="loggeduser"/>
        <KEY NAME="loggeduser" TYPE="foreign" FIELDS="loggeduser" REFTABLE="user" REFFIELDS="id" PREVIOUS="courseid"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="action" UNIQUE="false" FIELDS="action" COMMENT="insert/update/delete"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="stats_daily" COMMENT="to accumulate daily stats" PREVIOUS="scale_history" NEXT="stats_weekly">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="timeend"/>
        <FIELD NAME="timeend" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="courseid" NEXT="roleid"/>
        <FIELD NAME="roleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="id of role for the aggregates" PREVIOUS="timeend" NEXT="stattype"/>
        <FIELD NAME="stattype" TYPE="char" LENGTH="20" NOTNULL="true" DEFAULT="activity" SEQUENCE="false" ENUM="true" ENUMVALUES="'enrolments', 'activity', 'logins'" COMMENT="type of stat" PREVIOUS="roleid" NEXT="stat1"/>
        <FIELD NAME="stat1" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="stat1. usually used for reads" PREVIOUS="stattype" NEXT="stat2"/>
        <FIELD NAME="stat2" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="stat2. usually used for writes." PREVIOUS="stat1"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="courseid" UNIQUE="false" FIELDS="courseid" NEXT="timeend"/>
        <INDEX NAME="timeend" UNIQUE="false" FIELDS="timeend" PREVIOUS="courseid" NEXT="roleid"/>
        <INDEX NAME="roleid" UNIQUE="false" FIELDS="roleid" PREVIOUS="timeend"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="stats_weekly" COMMENT="To accumulate weekly stats" PREVIOUS="stats_daily" NEXT="stats_monthly">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="timeend"/>
        <FIELD NAME="timeend" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="courseid" NEXT="roleid"/>
        <FIELD NAME="roleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="id of role for the aggregates" PREVIOUS="timeend" NEXT="stattype"/>
        <FIELD NAME="stattype" TYPE="char" LENGTH="20" NOTNULL="true" DEFAULT="activity" SEQUENCE="false" ENUM="true" ENUMVALUES="'enrolments', 'activity', 'logins'" COMMENT="type of stat" PREVIOUS="roleid" NEXT="stat1"/>
        <FIELD NAME="stat1" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="stat1. usually used for reads" PREVIOUS="stattype" NEXT="stat2"/>
        <FIELD NAME="stat2" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="stat2. usually used for writes." PREVIOUS="stat1"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="courseid" UNIQUE="false" FIELDS="courseid" NEXT="timeend"/>
        <INDEX NAME="timeend" UNIQUE="false" FIELDS="timeend" PREVIOUS="courseid" NEXT="roleid"/>
        <INDEX NAME="roleid" UNIQUE="false" FIELDS="roleid" PREVIOUS="timeend"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="stats_monthly" COMMENT="To accumulate monthly stats" PREVIOUS="stats_weekly" NEXT="stats_user_daily">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="timeend"/>
        <FIELD NAME="timeend" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="courseid" NEXT="roleid"/>
        <FIELD NAME="roleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="id of role for the aggregates" PREVIOUS="timeend" NEXT="stattype"/>
        <FIELD NAME="stattype" TYPE="char" LENGTH="20" NOTNULL="true" DEFAULT="activity" SEQUENCE="false" ENUM="true" ENUMVALUES="'enrolments', 'activity', 'logins'" COMMENT="type of stat" PREVIOUS="roleid" NEXT="stat1"/>
        <FIELD NAME="stat1" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="stat1. usually used for reads" PREVIOUS="stattype" NEXT="stat2"/>
        <FIELD NAME="stat2" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="stat2. usually used for writes." PREVIOUS="stat1"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="courseid" UNIQUE="false" FIELDS="courseid" NEXT="timeend"/>
        <INDEX NAME="timeend" UNIQUE="false" FIELDS="timeend" PREVIOUS="courseid" NEXT="roleid"/>
        <INDEX NAME="roleid" UNIQUE="false" FIELDS="roleid" PREVIOUS="timeend"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="stats_user_daily" COMMENT="To accumulate daily stats per course/user" PREVIOUS="stats_monthly" NEXT="stats_user_weekly">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="courseid" NEXT="roleid"/>
        <FIELD NAME="roleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="timeend"/>
        <FIELD NAME="timeend" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="roleid" NEXT="statsreads"/>
        <FIELD NAME="statsreads" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timeend" NEXT="statswrites"/>
        <FIELD NAME="statswrites" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="statsreads" NEXT="stattype"/>
        <FIELD NAME="stattype" TYPE="char" LENGTH="30" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="statswrites"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="courseid" UNIQUE="false" FIELDS="courseid" NEXT="userid"/>
        <INDEX NAME="userid" UNIQUE="false" FIELDS="userid" PREVIOUS="courseid" NEXT="roleid"/>
        <INDEX NAME="roleid" UNIQUE="false" FIELDS="roleid" PREVIOUS="userid" NEXT="timeend"/>
        <INDEX NAME="timeend" UNIQUE="false" FIELDS="timeend" PREVIOUS="roleid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="stats_user_weekly" COMMENT="To accumulate weekly stats per course/user" PREVIOUS="stats_user_daily" NEXT="stats_user_monthly">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="courseid" NEXT="roleid"/>
        <FIELD NAME="roleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="timeend"/>
        <FIELD NAME="timeend" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="roleid" NEXT="statsreads"/>
        <FIELD NAME="statsreads" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timeend" NEXT="statswrites"/>
        <FIELD NAME="statswrites" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="statsreads" NEXT="stattype"/>
        <FIELD NAME="stattype" TYPE="char" LENGTH="30" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="statswrites"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="courseid" UNIQUE="false" FIELDS="courseid" NEXT="userid"/>
        <INDEX NAME="userid" UNIQUE="false" FIELDS="userid" PREVIOUS="courseid" NEXT="roleid"/>
        <INDEX NAME="roleid" UNIQUE="false" FIELDS="roleid" PREVIOUS="userid" NEXT="timeend"/>
        <INDEX NAME="timeend" UNIQUE="false" FIELDS="timeend" PREVIOUS="roleid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="stats_user_monthly" COMMENT="To accumulate monthly stats per course/user" PREVIOUS="stats_user_weekly" NEXT="post">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="courseid" NEXT="roleid"/>
        <FIELD NAME="roleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="timeend"/>
        <FIELD NAME="timeend" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="roleid" NEXT="statsreads"/>
        <FIELD NAME="statsreads" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timeend" NEXT="statswrites"/>
        <FIELD NAME="statswrites" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="statsreads" NEXT="stattype"/>
        <FIELD NAME="stattype" TYPE="char" LENGTH="30" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="statswrites"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="courseid" UNIQUE="false" FIELDS="courseid" NEXT="userid"/>
        <INDEX NAME="userid" UNIQUE="false" FIELDS="userid" PREVIOUS="courseid" NEXT="roleid"/>
        <INDEX NAME="roleid" UNIQUE="false" FIELDS="roleid" PREVIOUS="userid" NEXT="timeend"/>
        <INDEX NAME="timeend" UNIQUE="false" FIELDS="timeend" PREVIOUS="roleid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="post" COMMENT="Generic post table to hold data blog entries etc in different modules" PREVIOUS="stats_user_monthly" NEXT="role">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="module"/>
        <FIELD NAME="module" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="module" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="groupid"/>
        <FIELD NAME="groupid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="courseid" NEXT="moduleid"/>
        <FIELD NAME="moduleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="groupid" NEXT="coursemoduleid"/>
        <FIELD NAME="coursemoduleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="moduleid" NEXT="subject"/>
        <FIELD NAME="subject" TYPE="char" LENGTH="128" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="coursemoduleid" NEXT="summary"/>
        <FIELD NAME="summary" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="subject" NEXT="content"/>
        <FIELD NAME="content" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="summary" NEXT="uniquehash"/>
        <FIELD NAME="uniquehash" TYPE="char" LENGTH="128" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="content" NEXT="rating"/>
        <FIELD NAME="rating" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="uniquehash" NEXT="format"/>
        <FIELD NAME="format" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="rating" NEXT="attachment"/>
        <FIELD NAME="attachment" TYPE="char" LENGTH="100" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="attachment" PREVIOUS="format" NEXT="publishstate"/>
        <FIELD NAME="publishstate" TYPE="char" LENGTH="20" NOTNULL="true" DEFAULT="draft" SEQUENCE="false" ENUM="true" ENUMVALUES="'draft', 'site', 'public'" PREVIOUS="attachment" NEXT="lastmodified"/>
        <FIELD NAME="lastmodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="publishstate" NEXT="created"/>
        <FIELD NAME="created" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="lastmodified" NEXT="usermodified"/>
        <FIELD NAME="usermodified" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="created"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="usermodified"/>
        <KEY NAME="usermodified" TYPE="foreign" FIELDS="usermodified" REFTABLE="user" REFFIELDS="id" PREVIOUS="primary"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="id-userid" UNIQUE="true" FIELDS="id, userid" NEXT="lastmodified"/>
        <INDEX NAME="lastmodified" UNIQUE="false" FIELDS="lastmodified" PREVIOUS="id-userid" NEXT="module"/>
        <INDEX NAME="module" UNIQUE="false" FIELDS="module" PREVIOUS="lastmodified" NEXT="subject"/>
        <INDEX NAME="subject" UNIQUE="false" FIELDS="subject" PREVIOUS="module"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="role" COMMENT="moodle roles" PREVIOUS="post" NEXT="context">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="shortname"/>
        <FIELD NAME="shortname" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="description"/>
        <FIELD NAME="description" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="shortname" NEXT="sortorder"/>
        <FIELD NAME="sortorder" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="description"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="sortorder" UNIQUE="true" FIELDS="sortorder"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="context" COMMENT="one of these must be set" PREVIOUS="role" NEXT="context_temp">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="contextlevel"/>
        <FIELD NAME="contextlevel" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="instanceid"/>
        <FIELD NAME="instanceid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="contextlevel" NEXT="path"/>
        <FIELD NAME="path" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="instanceid" NEXT="depth"/>
        <FIELD NAME="depth" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="path"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="contextlevel-instanceid" UNIQUE="true" FIELDS="contextlevel, instanceid" NEXT="instanceid"/>
        <INDEX NAME="instanceid" UNIQUE="false" FIELDS="instanceid" PREVIOUS="contextlevel-instanceid" NEXT="path"/>
        <INDEX NAME="path" UNIQUE="false" FIELDS="path" PREVIOUS="instanceid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="context_temp" COMMENT="Used by build_context_path() in upgrade and cron to keep context depths and paths in sync." PREVIOUS="context" NEXT="capabilities">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="This id isn't autonumeric/sequence. It's the context-&gt;id" NEXT="path"/>
        <FIELD NAME="path" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="depth"/>
        <FIELD NAME="depth" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="path"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="capabilities" COMMENT="this defines all capabilities" PREVIOUS="context_temp" NEXT="role_allow_assign">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="captype"/>
        <FIELD NAME="captype" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="contextlevel"/>
        <FIELD NAME="contextlevel" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="captype" NEXT="component"/>
        <FIELD NAME="component" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="contextlevel" NEXT="riskbitmask"/>
        <FIELD NAME="riskbitmask" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="component"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="name"/>
        <KEY NAME="name" TYPE="unique" FIELDS="name" PREVIOUS="primary"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="role_allow_assign" COMMENT="this defines what role can assign what role" PREVIOUS="capabilities" NEXT="role_allow_override">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="roleid"/>
        <FIELD NAME="roleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="allowassign"/>
        <FIELD NAME="allowassign" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="roleid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="roleid"/>
        <KEY NAME="roleid" TYPE="foreign" FIELDS="roleid" REFTABLE="role" REFFIELDS="id" PREVIOUS="primary" NEXT="allowassign"/>
        <KEY NAME="allowassign" TYPE="foreign" FIELDS="allowassign" REFTABLE="role" REFFIELDS="id" PREVIOUS="roleid"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="roleid-allowassign" UNIQUE="true" FIELDS="roleid, allowassign"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="role_allow_override" COMMENT="this defines what role can override what role" PREVIOUS="role_allow_assign" NEXT="role_assignments">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="roleid"/>
        <FIELD NAME="roleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="allowoverride"/>
        <FIELD NAME="allowoverride" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="roleid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="roleid"/>
        <KEY NAME="roleid" TYPE="foreign" FIELDS="roleid" REFTABLE="role" REFFIELDS="id" PREVIOUS="primary" NEXT="allowoverride"/>
        <KEY NAME="allowoverride" TYPE="foreign" FIELDS="allowoverride" REFTABLE="role" REFFIELDS="id" PREVIOUS="roleid"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="roleid-allowoverride" UNIQUE="true" FIELDS="roleid, allowoverride"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="role_assignments" COMMENT="assigning roles to different context" PREVIOUS="role_allow_override" NEXT="role_capabilities">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="roleid"/>
        <FIELD NAME="roleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="contextid"/>
        <FIELD NAME="contextid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="roleid" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="contextid" NEXT="hidden"/>
        <FIELD NAME="hidden" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="timestart"/>
        <FIELD NAME="timestart" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="hidden" NEXT="timeend"/>
        <FIELD NAME="timeend" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timestart" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timeend" NEXT="modifierid"/>
        <FIELD NAME="modifierid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timemodified" NEXT="enrol"/>
        <FIELD NAME="enrol" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="modifierid" NEXT="sortorder"/>
        <FIELD NAME="sortorder" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="enrol"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="roleid"/>
        <KEY NAME="roleid" TYPE="foreign" FIELDS="roleid" REFTABLE="role" REFFIELDS="id" PREVIOUS="primary" NEXT="contextid"/>
        <KEY NAME="contextid" TYPE="foreign" FIELDS="contextid" REFTABLE="context" REFFIELDS="id" PREVIOUS="roleid" NEXT="userid"/>
        <KEY NAME="userid" TYPE="foreign" FIELDS="userid" REFTABLE="user" REFFIELDS="id" PREVIOUS="contextid"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="contextid-roleid-userid" UNIQUE="true" FIELDS="contextid, roleid, userid" NEXT="sortorder"/>
        <INDEX NAME="sortorder" UNIQUE="false" FIELDS="sortorder" PREVIOUS="contextid-roleid-userid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="role_capabilities" COMMENT="permission has to be signed, overriding a capability for a particular role in a particular context" PREVIOUS="role_assignments" NEXT="role_names">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="contextid"/>
        <FIELD NAME="contextid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="roleid"/>
        <FIELD NAME="roleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="contextid" NEXT="capability"/>
        <FIELD NAME="capability" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="roleid" NEXT="permission"/>
        <FIELD NAME="permission" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="capability" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="permission" NEXT="modifierid"/>
        <FIELD NAME="modifierid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timemodified"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="roleid"/>
        <KEY NAME="roleid" TYPE="foreign" FIELDS="roleid" REFTABLE="role" REFFIELDS="id" PREVIOUS="primary" NEXT="contextid"/>
        <KEY NAME="contextid" TYPE="foreign" FIELDS="contextid" REFTABLE="context" REFFIELDS="id" PREVIOUS="roleid" NEXT="modifierid"/>
        <KEY NAME="modifierid" TYPE="foreign" FIELDS="modifierid" REFTABLE="user" REFFIELDS="id" PREVIOUS="contextid" NEXT="capability"/>
        <KEY NAME="capability" TYPE="foreign" FIELDS="capability" REFTABLE="capabilities" REFFIELDS="name" PREVIOUS="modifierid"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="roleid-contextid-capability" UNIQUE="true" FIELDS="roleid, contextid, capability"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="role_names" COMMENT="role names in native strings" PREVIOUS="role_capabilities" NEXT="role_sortorder">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="roleid"/>
        <FIELD NAME="roleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="contextid"/>
        <FIELD NAME="contextid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="roleid" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="contextid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="roleid"/>
        <KEY NAME="roleid" TYPE="foreign" FIELDS="roleid" REFTABLE="role" REFFIELDS="id" PREVIOUS="primary" NEXT="contextid"/>
        <KEY NAME="contextid" TYPE="foreign" FIELDS="contextid" REFTABLE="context" REFFIELDS="id" PREVIOUS="roleid"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="roleid-contextid" UNIQUE="true" FIELDS="roleid, contextid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="role_sortorder" COMMENT="sort order of course managers in a course" PREVIOUS="role_names" NEXT="user_info_field">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="roleid"/>
        <FIELD NAME="roleid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="contextid"/>
        <FIELD NAME="contextid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="roleid" NEXT="sortoder"/>
        <FIELD NAME="sortoder" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" SEQUENCE="false" ENUM="false" PREVIOUS="contextid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="userid"/>
        <KEY NAME="userid" TYPE="foreign" FIELDS="userid" REFTABLE="user" REFFIELDS="id" PREVIOUS="primary" NEXT="roleid"/>
        <KEY NAME="roleid" TYPE="foreign" FIELDS="roleid" REFTABLE="role" REFFIELDS="id" PREVIOUS="userid" NEXT="contextid"/>
        <KEY NAME="contextid" TYPE="foreign" FIELDS="contextid" REFTABLE="context" REFFIELDS="id" PREVIOUS="roleid"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="userid-roleid-contextid" UNIQUE="true" FIELDS="userid, roleid, contextid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="user_info_field" COMMENT="Customisable user profile fields" PREVIOUS="role_sortorder" NEXT="user_info_category">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="shortname"/>
        <FIELD NAME="shortname" TYPE="char" LENGTH="255" NOTNULL="true" DEFAULT="shortname" SEQUENCE="false" ENUM="false" COMMENT="short name for each field" PREVIOUS="id" NEXT="name"/>
        <FIELD NAME="name" TYPE="text" LENGTH="big" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="field name" PREVIOUS="shortname" NEXT="datatype"/>
        <FIELD NAME="datatype" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="Type of data held in this field" PREVIOUS="name" NEXT="description"/>
        <FIELD NAME="description" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="Description of field" PREVIOUS="datatype" NEXT="categoryid"/>
        <FIELD NAME="categoryid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="id from category table" PREVIOUS="description" NEXT="sortorder"/>
        <FIELD NAME="sortorder" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="order within the category" PREVIOUS="categoryid" NEXT="required"/>
        <FIELD NAME="required" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Field required" PREVIOUS="sortorder" NEXT="locked"/>
        <FIELD NAME="locked" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Field locked" PREVIOUS="required" NEXT="visible"/>
        <FIELD NAME="visible" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Visibility: private, public, hidden" PREVIOUS="locked" NEXT="forceunique"/>
        <FIELD NAME="forceunique" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="should the field contain unique data" PREVIOUS="visible" NEXT="signup"/>
        <FIELD NAME="signup" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="display field on signup page" PREVIOUS="forceunique" NEXT="defaultdata"/>
        <FIELD NAME="defaultdata" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="Default value for this field" PREVIOUS="signup" NEXT="param1"/>
        <FIELD NAME="param1" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="General parameter field" PREVIOUS="defaultdata" NEXT="param2"/>
        <FIELD NAME="param2" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="General parameter field" PREVIOUS="param1" NEXT="param3"/>
        <FIELD NAME="param3" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="General parameter field" PREVIOUS="param2" NEXT="param4"/>
        <FIELD NAME="param4" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="General parameter field" PREVIOUS="param3" NEXT="param5"/>
        <FIELD NAME="param5" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="General parameter field" PREVIOUS="param4"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="user_info_category" COMMENT="Customisable fields categories" PREVIOUS="user_info_field" NEXT="user_info_data">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="Category name" PREVIOUS="id" NEXT="sortorder"/>
        <FIELD NAME="sortorder" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Display order" PREVIOUS="name"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="user_info_data" COMMENT="Data for the customisable user fields" PREVIOUS="user_info_category" NEXT="mnet_enrol_course">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="id from the user table" PREVIOUS="id" NEXT="fieldid"/>
        <FIELD NAME="fieldid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="id from the field table" PREVIOUS="userid" NEXT="data"/>
        <FIELD NAME="data" TYPE="text" LENGTH="big" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="Field data" PREVIOUS="fieldid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="userfieldidx" UNIQUE="false" FIELDS="userid, fieldid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="mnet_enrol_course" COMMENT="Information about courses on remote hosts" PREVIOUS="user_info_data" NEXT="mnet_enrol_assignments">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" COMMENT="Unique remote-course ID" NEXT="hostid"/>
        <FIELD NAME="hostid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="remoteid"/>
        <FIELD NAME="remoteid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Unique ID of course on its home server" PREVIOUS="hostid" NEXT="cat_id"/>
        <FIELD NAME="cat_id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="remoteid" NEXT="cat_name"/>
        <FIELD NAME="cat_name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="cat_id" NEXT="cat_description"/>
        <FIELD NAME="cat_description" TYPE="text" LENGTH="medium" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="cat_name" NEXT="sortorder"/>
        <FIELD NAME="sortorder" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="cat_description" NEXT="fullname"/>
        <FIELD NAME="fullname" TYPE="char" LENGTH="254" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="sortorder" NEXT="shortname"/>
        <FIELD NAME="shortname" TYPE="char" LENGTH="15" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="fullname" NEXT="idnumber"/>
        <FIELD NAME="idnumber" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="shortname" NEXT="summary"/>
        <FIELD NAME="summary" TYPE="text" LENGTH="medium" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="idnumber" NEXT="startdate"/>
        <FIELD NAME="startdate" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="summary" NEXT="cost"/>
        <FIELD NAME="cost" TYPE="char" LENGTH="10" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="startdate" NEXT="currency"/>
        <FIELD NAME="currency" TYPE="char" LENGTH="3" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="cost" NEXT="defaultroleid"/>
        <FIELD NAME="defaultroleid" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="currency" NEXT="defaultrolename"/>
        <FIELD NAME="defaultrolename" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="defaultroleid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="primary key of the mnet_course table"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="hostid_remoteid" UNIQUE="true" FIELDS="hostid, remoteid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="mnet_enrol_assignments" COMMENT="Information about enrolments on courses on remote hosts" PREVIOUS="mnet_enrol_course" NEXT="mnet_application">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" COMMENT="Unique enrollment ID" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Unique ID of user on *this* server" PREVIOUS="id" NEXT="hostid"/>
        <FIELD NAME="hostid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Unique ID of course on its home server" PREVIOUS="hostid" NEXT="rolename"/>
        <FIELD NAME="rolename" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="courseid" NEXT="enroltime"/>
        <FIELD NAME="enroltime" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="rolename" NEXT="enroltype"/>
        <FIELD NAME="enroltype" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="enroltime"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="primary key of the mnet_enrol_assignments table"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="hostid_courseid" UNIQUE="false" FIELDS="hostid, courseid" NEXT="userid"/>
        <INDEX NAME="userid" UNIQUE="false" FIELDS="userid" PREVIOUS="hostid_courseid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="mnet_application" COMMENT="Information about applications on remote hosts" PREVIOUS="mnet_enrol_assignments" NEXT="mnet_host">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="display_name"/>
        <FIELD NAME="display_name" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="xmlrpc_server_url"/>
        <FIELD NAME="xmlrpc_server_url" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="display_name" NEXT="sso_land_url"/>
        <FIELD NAME="sso_land_url" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="xmlrpc_server_url"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="mnet_host" COMMENT="Information about the local and remote hosts for RPC" PREVIOUS="mnet_application" NEXT="mnet_host2service">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" COMMENT="Unique Host ID" NEXT="deleted"/>
        <FIELD NAME="deleted" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="wwwroot"/>
        <FIELD NAME="wwwroot" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="deleted" NEXT="ip_address"/>
        <FIELD NAME="ip_address" TYPE="char" LENGTH="39" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="wwwroot" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="80" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="ip_address" NEXT="public_key"/>
        <FIELD NAME="public_key" TYPE="text" LENGTH="medium" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="public_key_expires"/>
        <FIELD NAME="public_key_expires" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="public_key" NEXT="transport"/>
        <FIELD NAME="transport" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="public_key_expires" NEXT="portno"/>
        <FIELD NAME="portno" TYPE="int" LENGTH="5" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="transport" NEXT="last_connect_time"/>
        <FIELD NAME="last_connect_time" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="portno" NEXT="last_log_id"/>
        <FIELD NAME="last_log_id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="last_connect_time" NEXT="force_theme"/>
        <FIELD NAME="force_theme" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="last_log_id" NEXT="theme"/>
        <FIELD NAME="theme" TYPE="char" LENGTH="100" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="force_theme" NEXT="applicationid"/>
        <FIELD NAME="applicationid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" ENUM="false" PREVIOUS="theme"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="primary key of the mnet_host table" NEXT="applicationid"/>
        <KEY NAME="applicationid" TYPE="foreign" FIELDS="applicationid" REFTABLE="mnet_application" REFFIELDS="id" PREVIOUS="primary"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="mnet_host2service" COMMENT="Information about the services for a given host" PREVIOUS="mnet_host" NEXT="mnet_log">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="hostid"/>
        <FIELD NAME="hostid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="serviceid"/>
        <FIELD NAME="serviceid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="hostid" NEXT="publish"/>
        <FIELD NAME="publish" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="serviceid" NEXT="subscribe"/>
        <FIELD NAME="subscribe" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="publish"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="primary key of the mnet_host2service table"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="hostid_serviceid" UNIQUE="true" FIELDS="hostid, serviceid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="mnet_log" COMMENT="Store session data from users migrating to other sites" PREVIOUS="mnet_host2service" NEXT="mnet_rpc">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="hostid"/>
        <FIELD NAME="hostid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Unique host ID" PREVIOUS="id" NEXT="remoteid"/>
        <FIELD NAME="remoteid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="hostid" NEXT="time"/>
        <FIELD NAME="time" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="remoteid" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="time" NEXT="ip"/>
        <FIELD NAME="ip" TYPE="char" LENGTH="15" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="course"/>
        <FIELD NAME="course" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="ip" NEXT="coursename"/>
        <FIELD NAME="coursename" TYPE="char" LENGTH="40" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="course" NEXT="module"/>
        <FIELD NAME="module" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="coursename" NEXT="cmid"/>
        <FIELD NAME="cmid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="module" NEXT="action"/>
        <FIELD NAME="action" TYPE="char" LENGTH="40" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="cmid" NEXT="url"/>
        <FIELD NAME="url" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="action" NEXT="info"/>
        <FIELD NAME="info" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="url"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="primary key of the mnet_log table"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="hostid_userid_course" UNIQUE="false" FIELDS="hostid, userid, course"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="mnet_rpc" COMMENT="Functions or methods that we may publish or subscribe to" PREVIOUS="mnet_log" NEXT="mnet_service">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" COMMENT="Unique Function ID" NEXT="function_name"/>
        <FIELD NAME="function_name" TYPE="char" LENGTH="40" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="xmlrpc_path"/>
        <FIELD NAME="xmlrpc_path" TYPE="char" LENGTH="80" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="function_name" NEXT="parent_type"/>
        <FIELD NAME="parent_type" TYPE="char" LENGTH="6" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="xmlrpc_path" NEXT="parent"/>
        <FIELD NAME="parent" TYPE="char" LENGTH="20" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="parent_type" NEXT="enabled"/>
        <FIELD NAME="enabled" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="parent" NEXT="help"/>
        <FIELD NAME="help" TYPE="text" LENGTH="medium" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="enabled" NEXT="profile"/>
        <FIELD NAME="profile" TYPE="text" LENGTH="medium" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="Method signature" PREVIOUS="help"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="primary key of the mnet_rpc table"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="enabled_xmlrpcpath" UNIQUE="false" FIELDS="enabled, xmlrpc_path"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="mnet_service" COMMENT="A service is a group of functions" PREVIOUS="mnet_rpc" NEXT="mnet_service2rpc">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" COMMENT="Unique Service ID" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="40" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="description"/>
        <FIELD NAME="description" TYPE="char" LENGTH="40" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="apiversion"/>
        <FIELD NAME="apiversion" TYPE="char" LENGTH="10" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="description" NEXT="offer"/>
        <FIELD NAME="offer" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Do we even offer this service?" PREVIOUS="apiversion"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="primary key of the mnet_service table"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="mnet_service2rpc" COMMENT="Group functions or methods under a service" PREVIOUS="mnet_service" NEXT="mnet_session">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" COMMENT="Required ID field" NEXT="serviceid"/>
        <FIELD NAME="serviceid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Unique service ID" PREVIOUS="id" NEXT="rpcid"/>
        <FIELD NAME="rpcid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Unique Function ID" PREVIOUS="serviceid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="primary key of the mnet_service2rpc table"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="rpcid_serviceid" UNIQUE="true" FIELDS="rpcid, serviceid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="mnet_session" COMMENT="Store session data from users migrating to other sites" PREVIOUS="mnet_service2rpc" NEXT="mnet_sso_access_control">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" COMMENT="Required ID field" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Unique user ID" PREVIOUS="id" NEXT="username"/>
        <FIELD NAME="username" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="Unique username" PREVIOUS="userid" NEXT="token"/>
        <FIELD NAME="token" TYPE="char" LENGTH="40" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="Unique SHA1 Token" PREVIOUS="username" NEXT="mnethostid"/>
        <FIELD NAME="mnethostid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Unique remote host ID" PREVIOUS="token" NEXT="useragent"/>
        <FIELD NAME="useragent" TYPE="char" LENGTH="40" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="SHA1 hash of User Agent" PREVIOUS="mnethostid" NEXT="confirm_timeout"/>
        <FIELD NAME="confirm_timeout" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="UNIX timestamp for expiry of session" PREVIOUS="useragent" NEXT="session_id"/>
        <FIELD NAME="session_id" TYPE="char" LENGTH="40" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="The PHP Session ID" PREVIOUS="confirm_timeout" NEXT="expires"/>
        <FIELD NAME="expires" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Expire time of session on peer" PREVIOUS="session_id"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="primary key of the mnet_session table"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="token" UNIQUE="true" FIELDS="token"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="mnet_sso_access_control" COMMENT="Users by host permitted (or not) to login from a remote provider" PREVIOUS="mnet_session" NEXT="events_queue">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" COMMENT="Required ID field" NEXT="username"/>
        <FIELD NAME="username" TYPE="char" LENGTH="100" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="Username" PREVIOUS="id" NEXT="mnet_host_id"/>
        <FIELD NAME="mnet_host_id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="id of mnet host" PREVIOUS="username" NEXT="accessctrl"/>
        <FIELD NAME="accessctrl" TYPE="char" LENGTH="20" NOTNULL="true" DEFAULT="allow" SEQUENCE="false" ENUM="false" COMMENT="Whether or not this user/host can login" PREVIOUS="mnet_host_id"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="primary key of the mnet_sso_access_control table"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="mnethostid_username" UNIQUE="true" FIELDS="mnet_host_id, username"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="events_queue" COMMENT="This table is for storing queued events. It stores only one copy of the eventdata here, and entries from this table are being references by the event_queue_handlers table." PREVIOUS="mnet_sso_access_control" NEXT="events_handlers">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="eventdata"/>
        <FIELD NAME="eventdata" TYPE="text" LENGTH="big" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="serialized version of the data object passed to the event handler." PREVIOUS="id" NEXT="stackdump"/>
        <FIELD NAME="stackdump" TYPE="text" LENGTH="medium" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="serialized debug_backtrace showing where the event was fired from" PREVIOUS="eventdata" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="$USER-&amp;gt;id when the event was fired" PREVIOUS="stackdump" NEXT="timecreated"/>
        <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="time stamp of the first time this was added" PREVIOUS="userid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="userid"/>
        <KEY NAME="userid" TYPE="foreign" FIELDS="userid" REFTABLE="user" REFFIELDS="id" PREVIOUS="primary"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="events_handlers" COMMENT="This table is for storing which components requests what type of event, and the location of the responsible handlers. For example, the assignment registers 'grade_updated' event with a function assignment_grade_handler() that should be called event time an 'grade_updated' event is triggered by grade_update() function." PREVIOUS="events_queue" NEXT="events_queue_handlers">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="eventname"/>
        <FIELD NAME="eventname" TYPE="char" LENGTH="166" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="name of the event, e.g. 'grade_updated'" PREVIOUS="id" NEXT="handlermodule"/>
        <FIELD NAME="handlermodule" TYPE="char" LENGTH="166" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="e.g. moodle, mod/forum, block/rss_client" PREVIOUS="eventname" NEXT="handlerfile"/>
        <FIELD NAME="handlerfile" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="path to the file of the function, eg /grade/export/lib.php" PREVIOUS="handlermodule" NEXT="handlerfunction"/>
        <FIELD NAME="handlerfunction" TYPE="text" LENGTH="medium" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="serialized string or array describing function, suitable to be passed to call_user_func()" PREVIOUS="handlerfile" NEXT="schedule"/>
        <FIELD NAME="schedule" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="'cron' or 'instant'." PREVIOUS="handlerfunction" NEXT="status"/>
        <FIELD NAME="status" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="number of failed attempts to process this handler" PREVIOUS="schedule"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="eventname-handlermodule" UNIQUE="true" FIELDS="eventname, handlermodule"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="events_queue_handlers" COMMENT="This is the list of queued handlers for processing. The event object is retrieved from the events_queue table. When no further reference is made to the event_queues table, the corresponding entry in the events_queue table should be deleted. Entry should get deleted after a successful event processing by the specified handler." PREVIOUS="events_handlers" NEXT="grade_outcomes">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="queuedeventid"/>
        <FIELD NAME="queuedeventid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="foreign key id corresponding to the id of the event_queues table" PREVIOUS="id" NEXT="handlerid"/>
        <FIELD NAME="handlerid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="foreign key id corresponding to the id of the event_handlers table" PREVIOUS="queuedeventid" NEXT="status"/>
        <FIELD NAME="status" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="false" SEQUENCE="false" ENUM="false" COMMENT="number of failed attempts to process this handler" PREVIOUS="handlerid" NEXT="errormessage"/>
        <FIELD NAME="errormessage" TYPE="text" LENGTH="medium" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="if an error happened last time we tried to process this event, record it here." PREVIOUS="status" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="time stamp of the last attempt to run this from the queue" PREVIOUS="errormessage"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="queuedeventid"/>
        <KEY NAME="queuedeventid" TYPE="foreign" FIELDS="queuedeventid" REFTABLE="events_queue" REFFIELDS="id" PREVIOUS="primary" NEXT="handlerid"/>
        <KEY NAME="handlerid" TYPE="foreign" FIELDS="handlerid" REFTABLE="events_handlers" REFFIELDS="id" PREVIOUS="queuedeventid"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="grade_outcomes" COMMENT="This table describes the outcomes used in the system. An outcome is a statement tied to a rubric scale from low to high, such as “Not met, Borderline, Met” (stored as 0,1 or 2)" PREVIOUS="events_queue_handlers" NEXT="grade_outcomes_courses">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" COMMENT="id of the table" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="Mostly these are defined site wide ie NULL" PREVIOUS="id" NEXT="shortname"/>
        <FIELD NAME="shortname" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="The short name or code for this outcome statement" PREVIOUS="courseid" NEXT="fullname"/>
        <FIELD NAME="fullname" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="The full description of the outcome (usually 1 sentence)" PREVIOUS="shortname" NEXT="scaleid"/>
        <FIELD NAME="scaleid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The recommended scale for this outcome." PREVIOUS="fullname" NEXT="description"/>
        <FIELD NAME="description" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="outcome description" PREVIOUS="scaleid" NEXT="timecreated"/>
        <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="the time this outcome was first created" PREVIOUS="description" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="the time this outcome was last updated" PREVIOUS="timecreated" NEXT="usermodified"/>
        <FIELD NAME="usermodified" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="the userid of the person who last modified this outcome" PREVIOUS="timemodified"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="courseid"/>
        <KEY NAME="courseid" TYPE="foreign" FIELDS="courseid" REFTABLE="course" REFFIELDS="id" PREVIOUS="primary" NEXT="scaleid"/>
        <KEY NAME="scaleid" TYPE="foreign" FIELDS="scaleid" REFTABLE="scale" REFFIELDS="id" PREVIOUS="courseid" NEXT="usermodified"/>
        <KEY NAME="usermodified" TYPE="foreign" FIELDS="usermodified" REFTABLE="user" REFFIELDS="id" PREVIOUS="scaleid" NEXT="courseid-shortname"/>
        <KEY NAME="courseid-shortname" TYPE="unique" FIELDS="courseid, shortname" PREVIOUS="usermodified"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="grade_outcomes_courses" COMMENT="stores what outcomes are used in what courses." PREVIOUS="grade_outcomes" NEXT="grade_categories">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="id of the course" PREVIOUS="id" NEXT="outcomeid"/>
        <FIELD NAME="outcomeid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="id of the outcome" PREVIOUS="courseid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="courseid"/>
        <KEY NAME="courseid" TYPE="foreign" FIELDS="courseid" REFTABLE="course" REFFIELDS="id" PREVIOUS="primary" NEXT="outcomeid"/>
        <KEY NAME="outcomeid" TYPE="foreign" FIELDS="outcomeid" REFTABLE="grade_outcomes" REFFIELDS="id" PREVIOUS="courseid" NEXT="courseid-outcomeid"/>
        <KEY NAME="courseid-outcomeid" TYPE="unique" FIELDS="courseid, outcomeid" PREVIOUS="outcomeid"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="grade_categories" COMMENT="This table keeps information about categories, used for grouping items." PREVIOUS="grade_outcomes_courses" NEXT="grade_items">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The course this grade category is part of" PREVIOUS="id" NEXT="parent"/>
        <FIELD NAME="parent" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="Categories can be hierarchical" PREVIOUS="courseid" NEXT="depth"/>
        <FIELD NAME="depth" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="How many parents does this category have?" PREVIOUS="parent" NEXT="path"/>
        <FIELD NAME="path" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="shows the path as /1/2/3 (like course_categories)" PREVIOUS="depth" NEXT="fullname"/>
        <FIELD NAME="fullname" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="The name of this grade category" PREVIOUS="path" NEXT="aggregation"/>
        <FIELD NAME="aggregation" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="A constant pointing to one of the predefined aggregation strategies (none, mean,median,sum, etc)" PREVIOUS="fullname" NEXT="keephigh"/>
        <FIELD NAME="keephigh" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Keep only the X highest items" PREVIOUS="aggregation" NEXT="droplow"/>
        <FIELD NAME="droplow" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Drop the X lowest items" PREVIOUS="keephigh" NEXT="aggregateonlygraded"/>
        <FIELD NAME="aggregateonlygraded" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="aggregate only graded activities" PREVIOUS="droplow" NEXT="aggregateoutcomes"/>
        <FIELD NAME="aggregateoutcomes" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Aggregate outcomes" PREVIOUS="aggregateonlygraded" NEXT="aggregatesubcats"/>
        <FIELD NAME="aggregatesubcats" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="ignore subcategories in aggregation" PREVIOUS="aggregateoutcomes" NEXT="timecreated"/>
        <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="aggregatesubcats" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="timecreated"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="courseid"/>
        <KEY NAME="courseid" TYPE="foreign" FIELDS="courseid" REFTABLE="course" REFFIELDS="id" PREVIOUS="primary" NEXT="parent"/>
        <KEY NAME="parent" TYPE="foreign" FIELDS="parent" REFTABLE="grade_categories" REFFIELDS="id" PREVIOUS="courseid"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="grade_items" COMMENT="This table keeps information about gradeable items (ie columns). If an activity (eg an assignment or quiz) has multiple grade_items associated with it (eg several outcomes or numerical grades), then there will be a corresponding multiple number of rows in this table." PREVIOUS="grade_categories" NEXT="grade_grades">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The course this item is part of" PREVIOUS="id" NEXT="categoryid"/>
        <FIELD NAME="categoryid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="(optional) the category group this item belongs to" PREVIOUS="courseid" NEXT="itemname"/>
        <FIELD NAME="itemname" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="The name of this item (pushed in by the module)" PREVIOUS="categoryid" NEXT="itemtype"/>
        <FIELD NAME="itemtype" TYPE="char" LENGTH="30" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="'mod', 'blocks', 'import', 'calculated' etc" PREVIOUS="itemname" NEXT="itemmodule"/>
        <FIELD NAME="itemmodule" TYPE="char" LENGTH="30" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="'forum', 'quiz', 'csv', etc" PREVIOUS="itemtype" NEXT="iteminstance"/>
        <FIELD NAME="iteminstance" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="id of the item module" PREVIOUS="itemmodule" NEXT="itemnumber"/>
        <FIELD NAME="itemnumber" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="Can be used to distinguish multiple grades for an activity" PREVIOUS="iteminstance" NEXT="iteminfo"/>
        <FIELD NAME="iteminfo" TYPE="text" LENGTH="medium" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="Info and notes about this item XXX" PREVIOUS="itemnumber" NEXT="idnumber"/>
        <FIELD NAME="idnumber" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="Arbitrary idnumber provided by the module responsible" PREVIOUS="iteminfo" NEXT="calculation"/>
        <FIELD NAME="calculation" TYPE="text" LENGTH="medium" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="Formula describing how to derive this grade from other items, referring to them using giXXX where XXX is grade item id ... eg something like: =sin(square([#gi20#])) + [#gi30#]" PREVIOUS="idnumber" NEXT="gradetype"/>
        <FIELD NAME="gradetype" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="false" DEFAULT="1" SEQUENCE="false" ENUM="false" COMMENT="0 = none, 1 = value, 2 = scale, 3 = text" PREVIOUS="calculation" NEXT="grademax"/>
        <FIELD NAME="grademax" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="100" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="What is the maximum allowable grade?" PREVIOUS="gradetype" NEXT="grademin"/>
        <FIELD NAME="grademin" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="What is the minimum allowable grade?" PREVIOUS="grademax" NEXT="scaleid"/>
        <FIELD NAME="scaleid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="If this grade is based on a scale, which one is it?" PREVIOUS="grademin" NEXT="outcomeid"/>
        <FIELD NAME="outcomeid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="If this grade is related to an outcome, which one is it?" PREVIOUS="scaleid" NEXT="gradepass"/>
        <FIELD NAME="gradepass" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="What grade is needed to pass? grademin &amp;lt; gradepass &amp;lt;= grademax" PREVIOUS="outcomeid" NEXT="multfactor"/>
        <FIELD NAME="multfactor" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="1.0" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="Multiply all grades by this" PREVIOUS="gradepass" NEXT="plusfactor"/>
        <FIELD NAME="plusfactor" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="Add this to all grades" PREVIOUS="multfactor" NEXT="aggregationcoef"/>
        <FIELD NAME="aggregationcoef" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="Aggregation coefficient used for category weights or other aggregation types" PREVIOUS="plusfactor" NEXT="sortorder"/>
        <FIELD NAME="sortorder" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Sorting order of the columns" PREVIOUS="aggregationcoef" NEXT="display"/>
        <FIELD NAME="display" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Display as real grades, percentages (in reference to the minimum and maximum grades) or letters (A, B, C etc..), or course default (0)" PREVIOUS="sortorder" NEXT="decimals"/>
        <FIELD NAME="decimals" TYPE="int" LENGTH="1" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="Also known as precision, the number of digits after the decimal point symbol." PREVIOUS="display" NEXT="hidden"/>
        <FIELD NAME="hidden" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="1 is hidden, &amp;gt; 1 is a date to hide until (prevents viewing)" PREVIOUS="decimals" NEXT="locked"/>
        <FIELD NAME="locked" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="1 is locked, &amp;gt; 1 is a date to lock until (prevents update)" PREVIOUS="hidden" NEXT="locktime"/>
        <FIELD NAME="locktime" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="lock all final grades after this date" PREVIOUS="locked" NEXT="needsupdate"/>
        <FIELD NAME="needsupdate" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="If this flag is set, then the whole column will be recalculated" PREVIOUS="locktime" NEXT="timecreated"/>
        <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The first time this grade_item was created" PREVIOUS="needsupdate" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The last time this grade_item was modified" PREVIOUS="timecreated"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="courseid"/>
        <KEY NAME="courseid" TYPE="foreign" FIELDS="courseid" REFTABLE="course" REFFIELDS="id" PREVIOUS="primary" NEXT="categoryid"/>
        <KEY NAME="categoryid" TYPE="foreign" FIELDS="categoryid" REFTABLE="grade_categories" REFFIELDS="id" PREVIOUS="courseid" NEXT="scaleid"/>
        <KEY NAME="scaleid" TYPE="foreign" FIELDS="scaleid" REFTABLE="scale" REFFIELDS="id" PREVIOUS="categoryid" NEXT="outcomeid"/>
        <KEY NAME="outcomeid" TYPE="foreign" FIELDS="outcomeid" REFTABLE="grade_outcomes" REFFIELDS="id" PREVIOUS="scaleid"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="locked-locktime" UNIQUE="false" FIELDS="locked, locktime" COMMENT="used in grading cron" NEXT="itemtype-needsupdate"/>
        <INDEX NAME="itemtype-needsupdate" UNIQUE="false" FIELDS="itemtype, needsupdate" COMMENT="used in grading cron" PREVIOUS="locked-locktime" NEXT="gradetype"/>
        <INDEX NAME="gradetype" UNIQUE="false" FIELDS="gradetype" COMMENT="index for gradetype" PREVIOUS="itemtype-needsupdate" NEXT="idnumber-courseid"/>
        <INDEX NAME="idnumber-courseid" UNIQUE="false" FIELDS="idnumber, courseid" COMMENT="non unique index (although programatically we are guarantying some sort of uniqueness both under this table and the course_modules one). TODO: We need a central store of module idnumbers in the future." PREVIOUS="gradetype"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="grade_grades" COMMENT="grade_grades  This table keeps individual grades for each user and each item, exactly as imported or submitted by modules. The rawgrademax/min and rawscaleid are stored here to record the values at the time the grade was stored, because teachers might change this for an activity! All the results are normalised/resampled for the final grade value." PREVIOUS="grade_items" NEXT="grade_outcomes_history">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="itemid"/>
        <FIELD NAME="itemid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The item this grade belongs to" PREVIOUS="id" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The user who this grade is for" PREVIOUS="itemid" NEXT="rawgrade"/>
        <FIELD NAME="rawgrade" TYPE="number" LENGTH="10" NOTNULL="false" UNSIGNED="false" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="If the grade is a float value (or has been converted to one)" PREVIOUS="userid" NEXT="rawgrademax"/>
        <FIELD NAME="rawgrademax" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="100" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="The maximum allowable grade when this was created" PREVIOUS="rawgrade" NEXT="rawgrademin"/>
        <FIELD NAME="rawgrademin" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="The minimum allowable grade when this was created" PREVIOUS="rawgrademax" NEXT="rawscaleid"/>
        <FIELD NAME="rawscaleid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="If this grade is based on a scale, which one was it?" PREVIOUS="rawgrademin" NEXT="usermodified"/>
        <FIELD NAME="usermodified" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="the userid of the person who last modified this grade" PREVIOUS="rawscaleid" NEXT="finalgrade"/>
        <FIELD NAME="finalgrade" TYPE="number" LENGTH="10" NOTNULL="false" UNSIGNED="false" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="The final grade (cached) after all calculations are made" PREVIOUS="usermodified" NEXT="hidden"/>
        <FIELD NAME="hidden" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="show 0, hide 1 or hide until date" PREVIOUS="finalgrade" NEXT="locked"/>
        <FIELD NAME="locked" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="not locked 0, locked from date" PREVIOUS="hidden" NEXT="locktime"/>
        <FIELD NAME="locktime" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="automatic locking of final grade, 0 means none, date otherwise" PREVIOUS="locked" NEXT="exported"/>
        <FIELD NAME="exported" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="date of last grade export, 0 if none" PREVIOUS="locktime" NEXT="overridden"/>
        <FIELD NAME="overridden" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="indicates grade overridden from gradebook, 0 means none, date means overridden" PREVIOUS="exported" NEXT="excluded"/>
        <FIELD NAME="excluded" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="grade excluded from aggregation functions, date means when excluded" PREVIOUS="overridden" NEXT="feedback"/>
        <FIELD NAME="feedback" TYPE="text" LENGTH="medium" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="grading feedback" PREVIOUS="excluded" NEXT="feedbackformat"/>
        <FIELD NAME="feedbackformat" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="format of feedback text" PREVIOUS="feedback" NEXT="information"/>
        <FIELD NAME="information" TYPE="text" LENGTH="medium" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="optiona information" PREVIOUS="feedbackformat" NEXT="informationformat"/>
        <FIELD NAME="informationformat" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="format of information text" PREVIOUS="information" NEXT="timecreated"/>
        <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="the time this grade was first created" PREVIOUS="informationformat" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="the time this grade was last modified" PREVIOUS="timecreated"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="itemid"/>
        <KEY NAME="itemid" TYPE="foreign" FIELDS="itemid" REFTABLE="grade_items" REFFIELDS="id" PREVIOUS="primary" NEXT="userid"/>
        <KEY NAME="userid" TYPE="foreign" FIELDS="userid" REFTABLE="user" REFFIELDS="id" PREVIOUS="itemid" NEXT="rawscaleid"/>
        <KEY NAME="rawscaleid" TYPE="foreign" FIELDS="rawscaleid" REFTABLE="scale" REFFIELDS="id" PREVIOUS="userid" NEXT="usermodified"/>
        <KEY NAME="usermodified" TYPE="foreign" FIELDS="usermodified" REFTABLE="user" REFFIELDS="id" PREVIOUS="rawscaleid" NEXT="userid-itemid"/>
        <KEY NAME="userid-itemid" TYPE="unique" FIELDS="userid, itemid" COMMENT="one entry per user per item" PREVIOUS="usermodified"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="locked-locktime" UNIQUE="false" FIELDS="locked, locktime" COMMENT="used in grading cron"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="grade_outcomes_history" COMMENT="History table" PREVIOUS="grade_grades" NEXT="grade_categories_history">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="action"/>
        <FIELD NAME="action" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="created/modified/deleted constants" PREVIOUS="id" NEXT="oldid"/>
        <FIELD NAME="oldid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="action" NEXT="source"/>
        <FIELD NAME="source" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="What caused the modification? manual/module/import/..." PREVIOUS="oldid" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The last time this grade_item was modified" PREVIOUS="source" NEXT="loggeduser"/>
        <FIELD NAME="loggeduser" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="the userid of the person who last modified this outcome" PREVIOUS="timemodified" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="Mostly these are defined site wide ie NULL" PREVIOUS="loggeduser" NEXT="shortname"/>
        <FIELD NAME="shortname" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="The short name or code for this outcome statement" PREVIOUS="courseid" NEXT="fullname"/>
        <FIELD NAME="fullname" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="The full description of the outcome (usually 1 sentence)" PREVIOUS="shortname" NEXT="scaleid"/>
        <FIELD NAME="scaleid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The recommended scale for this outcome." PREVIOUS="fullname" NEXT="description"/>
        <FIELD NAME="description" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="Outcome description" PREVIOUS="scaleid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="oldid"/>
        <KEY NAME="oldid" TYPE="foreign" FIELDS="oldid" REFTABLE="grade_outcomes" REFFIELDS="id" PREVIOUS="primary" NEXT="courseid"/>
        <KEY NAME="courseid" TYPE="foreign" FIELDS="courseid" REFTABLE="course" REFFIELDS="id" PREVIOUS="oldid" NEXT="scaleid"/>
        <KEY NAME="scaleid" TYPE="foreign" FIELDS="scaleid" REFTABLE="scale" REFFIELDS="id" PREVIOUS="courseid" NEXT="loggeduser"/>
        <KEY NAME="loggeduser" TYPE="foreign" FIELDS="loggeduser" REFTABLE="user" REFFIELDS="id" PREVIOUS="scaleid"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="action" UNIQUE="false" FIELDS="action" COMMENT="insert/update/delete"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="grade_categories_history" COMMENT="History of grade_categories" PREVIOUS="grade_outcomes_history" NEXT="grade_items_history">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="action"/>
        <FIELD NAME="action" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="created/modified/deleted constants" PREVIOUS="id" NEXT="oldid"/>
        <FIELD NAME="oldid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="action" NEXT="source"/>
        <FIELD NAME="source" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="What caused the modification? manual/module/import/..." PREVIOUS="oldid" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The last time this grade_item was modified" PREVIOUS="source" NEXT="loggeduser"/>
        <FIELD NAME="loggeduser" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="the userid of the person who last modified this outcome" PREVIOUS="timemodified" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The course this grade category is part of" PREVIOUS="loggeduser" NEXT="parent"/>
        <FIELD NAME="parent" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="Categories can be hierarchical" PREVIOUS="courseid" NEXT="depth"/>
        <FIELD NAME="depth" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="How many parents does this category have?" PREVIOUS="parent" NEXT="path"/>
        <FIELD NAME="path" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="shows the path as /1/2/3 (like course_categories)" PREVIOUS="depth" NEXT="fullname"/>
        <FIELD NAME="fullname" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="The name of this grade category" PREVIOUS="path" NEXT="aggregation"/>
        <FIELD NAME="aggregation" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="A constant pointing to one of the predefined aggregation strategies (none, mean,median,sum, etc)" PREVIOUS="fullname" NEXT="keephigh"/>
        <FIELD NAME="keephigh" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Keep only the X highest items" PREVIOUS="aggregation" NEXT="droplow"/>
        <FIELD NAME="droplow" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Drop the X lowest items" PREVIOUS="keephigh" NEXT="aggregateonlygraded"/>
        <FIELD NAME="aggregateonlygraded" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="aggregate only graded items" PREVIOUS="droplow" NEXT="aggregateoutcomes"/>
        <FIELD NAME="aggregateoutcomes" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Aggregate outcomes" PREVIOUS="aggregateonlygraded" NEXT="aggregatesubcats"/>
        <FIELD NAME="aggregatesubcats" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="ignore subcategories in aggregation" PREVIOUS="aggregateoutcomes"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="oldid"/>
        <KEY NAME="oldid" TYPE="foreign" FIELDS="oldid" REFTABLE="grade_categories" REFFIELDS="id" PREVIOUS="primary" NEXT="courseid"/>
        <KEY NAME="courseid" TYPE="foreign" FIELDS="courseid" REFTABLE="course" REFFIELDS="id" PREVIOUS="oldid" NEXT="parent"/>
        <KEY NAME="parent" TYPE="foreign" FIELDS="parent" REFTABLE="grade_categories" REFFIELDS="id" PREVIOUS="courseid" NEXT="loggeduser"/>
        <KEY NAME="loggeduser" TYPE="foreign" FIELDS="loggeduser" REFTABLE="user" REFFIELDS="id" PREVIOUS="parent"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="action" UNIQUE="false" FIELDS="action" COMMENT="insert/update/delete"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="grade_items_history" COMMENT="History of grade_items" PREVIOUS="grade_categories_history" NEXT="grade_grades_history">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="action"/>
        <FIELD NAME="action" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="created/modified/deleted constants" PREVIOUS="id" NEXT="oldid"/>
        <FIELD NAME="oldid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="action" NEXT="source"/>
        <FIELD NAME="source" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="What caused the modification? manual/module/import/..." PREVIOUS="oldid" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The last time this grade_item was modified" PREVIOUS="source" NEXT="loggeduser"/>
        <FIELD NAME="loggeduser" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="the userid of the person who last modified this outcome" PREVIOUS="timemodified" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The course this item is part of" PREVIOUS="loggeduser" NEXT="categoryid"/>
        <FIELD NAME="categoryid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="(optional) the category group this item belongs to" PREVIOUS="courseid" NEXT="itemname"/>
        <FIELD NAME="itemname" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="The name of this item (pushed in by the module)" PREVIOUS="categoryid" NEXT="itemtype"/>
        <FIELD NAME="itemtype" TYPE="char" LENGTH="30" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="'mod', 'blocks', 'import', 'calculated' etc" PREVIOUS="itemname" NEXT="itemmodule"/>
        <FIELD NAME="itemmodule" TYPE="char" LENGTH="30" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="'forum', 'quiz', 'csv', etc" PREVIOUS="itemtype" NEXT="iteminstance"/>
        <FIELD NAME="iteminstance" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="id of the item module" PREVIOUS="itemmodule" NEXT="itemnumber"/>
        <FIELD NAME="itemnumber" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="Can be used to distinguish multiple grades for an activity" PREVIOUS="iteminstance" NEXT="iteminfo"/>
        <FIELD NAME="iteminfo" TYPE="text" LENGTH="medium" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="Info and notes about this item XXX" PREVIOUS="itemnumber" NEXT="idnumber"/>
        <FIELD NAME="idnumber" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="Arbitrary idnumber provided by the module responsible" PREVIOUS="iteminfo" NEXT="calculation"/>
        <FIELD NAME="calculation" TYPE="text" LENGTH="medium" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="Formula describing how to derive this grade from other items, referring to them using giXXX where XXX is grade item id ... eg something like: =sin(square([#gi20#])) + [#gi30#]" PREVIOUS="idnumber" NEXT="gradetype"/>
        <FIELD NAME="gradetype" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="false" DEFAULT="1" SEQUENCE="false" ENUM="false" COMMENT="0 = none, 1 = value, 2 = scale, 3 = text" PREVIOUS="calculation" NEXT="grademax"/>
        <FIELD NAME="grademax" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="100" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="What is the maximum allowable grade?" PREVIOUS="gradetype" NEXT="grademin"/>
        <FIELD NAME="grademin" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="What is the minimum allowable grade?" PREVIOUS="grademax" NEXT="scaleid"/>
        <FIELD NAME="scaleid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="If this grade is based on a scale, which one is it?" PREVIOUS="grademin" NEXT="outcomeid"/>
        <FIELD NAME="outcomeid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="If this grade is related to an outcome, which one is it?" PREVIOUS="scaleid" NEXT="gradepass"/>
        <FIELD NAME="gradepass" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="What grade is needed to pass? grademin &amp;lt; gradepass &amp;lt;= grademax" PREVIOUS="outcomeid" NEXT="multfactor"/>
        <FIELD NAME="multfactor" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="1.0" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="Multiply all grades by this" PREVIOUS="gradepass" NEXT="plusfactor"/>
        <FIELD NAME="plusfactor" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="Add this to all grades" PREVIOUS="multfactor" NEXT="aggregationcoef"/>
        <FIELD NAME="aggregationcoef" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="Aggregation coefficient used for category weights or other aggregation types" PREVIOUS="plusfactor" NEXT="sortorder"/>
        <FIELD NAME="sortorder" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="Sorting order of the columns" PREVIOUS="aggregationcoef" NEXT="hidden"/>
        <FIELD NAME="hidden" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="1 is hidden, &amp;gt; 1 is a date to hide until (prevents viewing)" PREVIOUS="sortorder" NEXT="locked"/>
        <FIELD NAME="locked" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="1 is locked, &amp;gt; 1 is a date to lock until (prevents update)" PREVIOUS="hidden" NEXT="locktime"/>
        <FIELD NAME="locktime" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="lock all final grades after this date" PREVIOUS="locked" NEXT="needsupdate"/>
        <FIELD NAME="needsupdate" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="If this flag is set, then the whole column will be recalculated" PREVIOUS="locktime"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="oldid"/>
        <KEY NAME="oldid" TYPE="foreign" FIELDS="oldid" REFTABLE="grade_items" REFFIELDS="id" PREVIOUS="primary" NEXT="courseid"/>
        <KEY NAME="courseid" TYPE="foreign" FIELDS="courseid" REFTABLE="course" REFFIELDS="id" PREVIOUS="oldid" NEXT="categoryid"/>
        <KEY NAME="categoryid" TYPE="foreign" FIELDS="categoryid" REFTABLE="grade_categories" REFFIELDS="id" PREVIOUS="courseid" NEXT="scaleid"/>
        <KEY NAME="scaleid" TYPE="foreign" FIELDS="scaleid" REFTABLE="scale" REFFIELDS="id" PREVIOUS="categoryid" NEXT="outcomeid"/>
        <KEY NAME="outcomeid" TYPE="foreign" FIELDS="outcomeid" REFTABLE="grade_outcomes" REFFIELDS="id" PREVIOUS="scaleid" NEXT="loggeduser"/>
        <KEY NAME="loggeduser" TYPE="foreign" FIELDS="loggeduser" REFTABLE="user" REFFIELDS="id" PREVIOUS="outcomeid"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="action" UNIQUE="false" FIELDS="action" COMMENT="insert/update/delete"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="grade_grades_history" COMMENT="History table" PREVIOUS="grade_items_history" NEXT="grade_import_newitem">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="action"/>
        <FIELD NAME="action" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="created/modified/deleted constants" PREVIOUS="id" NEXT="oldid"/>
        <FIELD NAME="oldid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="action" NEXT="source"/>
        <FIELD NAME="source" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="What caused the modification? manual/module/import/..." PREVIOUS="oldid" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The last time this grade_item was modified" PREVIOUS="source" NEXT="loggeduser"/>
        <FIELD NAME="loggeduser" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="the userid of the person who last modified this outcome" PREVIOUS="timemodified" NEXT="itemid"/>
        <FIELD NAME="itemid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The item this grade belongs to" PREVIOUS="loggeduser" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="The user who this grade is for" PREVIOUS="itemid" NEXT="rawgrade"/>
        <FIELD NAME="rawgrade" TYPE="number" LENGTH="10" NOTNULL="false" UNSIGNED="false" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="If the grade is a float value (or has been converted to one)" PREVIOUS="userid" NEXT="rawgrademax"/>
        <FIELD NAME="rawgrademax" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="100" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="The maximum allowable grade when this was created" PREVIOUS="rawgrade" NEXT="rawgrademin"/>
        <FIELD NAME="rawgrademin" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="The minimum allowable grade when this was created" PREVIOUS="rawgrademax" NEXT="rawscaleid"/>
        <FIELD NAME="rawscaleid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="If this grade is based on a scale, which one was it?" PREVIOUS="rawgrademin" NEXT="usermodified"/>
        <FIELD NAME="usermodified" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="the userid of the person who last modified this grade" PREVIOUS="rawscaleid" NEXT="finalgrade"/>
        <FIELD NAME="finalgrade" TYPE="number" LENGTH="10" NOTNULL="false" UNSIGNED="false" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="The final grade (cached) after all calculations are made" PREVIOUS="usermodified" NEXT="hidden"/>
        <FIELD NAME="hidden" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="show 0, hide 1 or hide until date" PREVIOUS="finalgrade" NEXT="locked"/>
        <FIELD NAME="locked" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="not locked 0, locked from date" PREVIOUS="hidden" NEXT="locktime"/>
        <FIELD NAME="locktime" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="automatic locking of final grade, 0 means none, date otherwise" PREVIOUS="locked" NEXT="exported"/>
        <FIELD NAME="exported" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="date of last grade export, 0 if none" PREVIOUS="locktime" NEXT="overridden"/>
        <FIELD NAME="overridden" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="indicates grade overridden from gradebook, 0 means none, date means overridden" PREVIOUS="exported" NEXT="excluded"/>
        <FIELD NAME="excluded" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="grade excluded from aggregation functions, date means when excluded" PREVIOUS="overridden" NEXT="feedback"/>
        <FIELD NAME="feedback" TYPE="text" LENGTH="medium" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="grading feedback" PREVIOUS="excluded" NEXT="feedbackformat"/>
        <FIELD NAME="feedbackformat" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="format of feedback text" PREVIOUS="feedback" NEXT="information"/>
        <FIELD NAME="information" TYPE="text" LENGTH="medium" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="optiona information" PREVIOUS="feedbackformat" NEXT="informationformat"/>
        <FIELD NAME="informationformat" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="format of information text" PREVIOUS="information"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="oldid"/>
        <KEY NAME="oldid" TYPE="foreign" FIELDS="oldid" REFTABLE="grade_grades" REFFIELDS="id" PREVIOUS="primary" NEXT="itemid"/>
        <KEY NAME="itemid" TYPE="foreign" FIELDS="itemid" REFTABLE="grade_items" REFFIELDS="id" PREVIOUS="oldid" NEXT="userid"/>
        <KEY NAME="userid" TYPE="foreign" FIELDS="userid" REFTABLE="user" REFFIELDS="id" PREVIOUS="itemid" NEXT="rawscaleid"/>
        <KEY NAME="rawscaleid" TYPE="foreign" FIELDS="rawscaleid" REFTABLE="scale" REFFIELDS="id" PREVIOUS="userid" NEXT="usermodified"/>
        <KEY NAME="usermodified" TYPE="foreign" FIELDS="usermodified" REFTABLE="user" REFFIELDS="id" PREVIOUS="rawscaleid" NEXT="loggeduser"/>
        <KEY NAME="loggeduser" TYPE="foreign" FIELDS="loggeduser" REFTABLE="user" REFFIELDS="id" PREVIOUS="usermodified"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="action" UNIQUE="false" FIELDS="action" COMMENT="insert/update/delete"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="grade_import_newitem" COMMENT="temporary table for storing new grade_item names from grade import" PREVIOUS="grade_grades_history" NEXT="grade_import_values">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="itemname"/>
        <FIELD NAME="itemname" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="new grade item name" PREVIOUS="id" NEXT="importcode"/>
        <FIELD NAME="importcode" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="import batch code for identification" PREVIOUS="itemname" NEXT="importer"/>
        <FIELD NAME="importer" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="user importing the data" PREVIOUS="importcode"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="importer"/>
        <KEY NAME="importer" TYPE="foreign" FIELDS="importer" REFTABLE="user" REFFIELDS="id" PREVIOUS="primary"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="grade_import_values" COMMENT="Temporary table for importing grades" PREVIOUS="grade_import_newitem" NEXT="tag">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="itemid"/>
        <FIELD NAME="itemid" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="if set, this points to existing grade_items id" PREVIOUS="id" NEXT="newgradeitem"/>
        <FIELD NAME="newgradeitem" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="if set, points to the id of grade_import_newitem" PREVIOUS="itemid" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="newgradeitem" NEXT="finalgrade"/>
        <FIELD NAME="finalgrade" TYPE="number" LENGTH="10" NOTNULL="false" UNSIGNED="false" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="raw grade value" PREVIOUS="userid" NEXT="feedback"/>
        <FIELD NAME="feedback" TYPE="text" LENGTH="medium" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="finalgrade" NEXT="importcode"/>
        <FIELD NAME="importcode" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="similar to backup_code, a unique batch code for identifying one batch of imports" PREVIOUS="feedback" NEXT="importer"/>
        <FIELD NAME="importer" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="importcode"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="itemid"/>
        <KEY NAME="itemid" TYPE="foreign" FIELDS="itemid" REFTABLE="grade_items" REFFIELDS="id" PREVIOUS="primary" NEXT="newgradeitem"/>
        <KEY NAME="newgradeitem" TYPE="foreign" FIELDS="newgradeitem" REFTABLE="grade_import_newitem" REFFIELDS="id" PREVIOUS="itemid" NEXT="importer"/>
        <KEY NAME="importer" TYPE="foreign" FIELDS="importer" REFTABLE="user" REFFIELDS="id" COMMENT="user who is importing" PREVIOUS="newgradeitem"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="tag" COMMENT="Tag table - this generic table will replace the old &quot;tags&quot; table." PREVIOUS="grade_import_values" NEXT="tag_correlation">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="rawname"/>
        <FIELD NAME="rawname" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="The raw, unnormalised name for the tag as entered by users" PREVIOUS="name" NEXT="tagtype"/>
        <FIELD NAME="tagtype" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="rawname" NEXT="description"/>
        <FIELD NAME="description" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="tagtype" NEXT="descriptionformat"/>
        <FIELD NAME="descriptionformat" TYPE="int" LENGTH="2" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="description" NEXT="flag"/>
        <FIELD NAME="flag" TYPE="int" LENGTH="4" NOTNULL="false" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="a tag can be 'flagged' as inappropriate" PREVIOUS="descriptionformat" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="flag"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="userid"/>
        <KEY NAME="userid" TYPE="foreign" FIELDS="userid" REFTABLE="user" REFFIELDS="id" PREVIOUS="primary"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="name" UNIQUE="true" FIELDS="name" COMMENT="tag names are unique"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="tag_correlation" COMMENT="The rationale for the 'tag_correlation' table is performance.   It works as a cache for a potentially heavy load query done at the 'tag_instance' table.   So, the 'tag_correlation' table stores redundant information derived from the 'tag_instance' table" PREVIOUS="tag" NEXT="tag_instance">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="tagid"/>
        <FIELD NAME="tagid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="correlatedtags"/>
        <FIELD NAME="correlatedtags" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="tagid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="tagid"/>
        <KEY NAME="tagid" TYPE="foreign" FIELDS="tagid" REFTABLE="tag" REFFIELDS="id" PREVIOUS="primary"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="tag_instance" COMMENT="tag_instance table holds the information of associations between tags and other items" PREVIOUS="tag_correlation" NEXT="groups">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="tagid"/>
        <FIELD NAME="tagid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="itemtype"/>
        <FIELD NAME="itemtype" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="tagid" NEXT="itemid"/>
        <FIELD NAME="itemid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="itemtype" NEXT="ordering"/>
        <FIELD NAME="ordering" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="Maintains the order of the tag instances of an item" PREVIOUS="itemid" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" COMMENT="timemodified" PREVIOUS="ordering"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="tagid"/>
        <KEY NAME="tagid" TYPE="foreign" FIELDS="tagid" REFTABLE="tag" REFFIELDS="id" PREVIOUS="primary"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="itemtype-itemid-tagid" UNIQUE="true" FIELDS="itemtype, itemid, tagid"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="groups" COMMENT="Each record represents a group." PREVIOUS="tag_instance" NEXT="groupings">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="254" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="Short human readable unique name for the group." PREVIOUS="courseid" NEXT="description"/>
        <FIELD NAME="description" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="enrolmentkey"/>
        <FIELD NAME="enrolmentkey" TYPE="char" LENGTH="50" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="description" NEXT="picture"/>
        <FIELD NAME="picture" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="enrolmentkey" NEXT="hidepicture"/>
        <FIELD NAME="hidepicture" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="picture" NEXT="timecreated"/>
        <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="hidepicture" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timecreated"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="courseid"/>
        <KEY NAME="courseid" TYPE="foreign" FIELDS="courseid" REFTABLE="course" REFFIELDS="id" PREVIOUS="primary"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="groupings" COMMENT="A grouping is a collection of groups. WAS: groups_groupings" PREVIOUS="groups" NEXT="groups_members">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="Short human readable unique name for group." PREVIOUS="courseid" NEXT="description"/>
        <FIELD NAME="description" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="configdata"/>
        <FIELD NAME="configdata" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="extra configuration data - may be used by group IU tools" PREVIOUS="description" NEXT="timecreated"/>
        <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="configdata" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="timecreated"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="courseid"/>
        <KEY NAME="courseid" TYPE="foreign" FIELDS="courseid" REFTABLE="course" REFFIELDS="id" PREVIOUS="primary"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="groups_members" COMMENT="Link a user to a group." PREVIOUS="groupings" NEXT="groupings_groups">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="groupid"/>
        <FIELD NAME="groupid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="groupid" NEXT="timeadded"/>
        <FIELD NAME="timeadded" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="userid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="groupid"/>
        <KEY NAME="groupid" TYPE="foreign" FIELDS="groupid" REFTABLE="groups" REFFIELDS="id" PREVIOUS="primary" NEXT="userid"/>
        <KEY NAME="userid" TYPE="foreign" FIELDS="userid" REFTABLE="user" REFFIELDS="id" PREVIOUS="groupid"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="groupings_groups" COMMENT="Link a grouping to a group (note, groups can be in multiple groupings ONLY in a course). WAS: groups_groupings_groups" PREVIOUS="groups_members" NEXT="user_private_key">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="groupingid"/>
        <FIELD NAME="groupingid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="groupid"/>
        <FIELD NAME="groupid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="groupingid" NEXT="timeadded"/>
        <FIELD NAME="timeadded" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="groupid"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="groupingid"/>
        <KEY NAME="groupingid" TYPE="foreign" FIELDS="groupingid" REFTABLE="groupings" REFFIELDS="id" PREVIOUS="primary" NEXT="groupid"/>
        <KEY NAME="groupid" TYPE="foreign" FIELDS="groupid" REFTABLE="groups" REFFIELDS="id" PREVIOUS="groupingid"/>
      </KEYS>
    </TABLE>
    <TABLE NAME="user_private_key" COMMENT="access keys used in cookieless scripts - rss, etc." PREVIOUS="groupings_groups" NEXT="grade_letters">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="script"/>
        <FIELD NAME="script" TYPE="char" LENGTH="128" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="plugin, module - unique identifier" PREVIOUS="id" NEXT="value"/>
        <FIELD NAME="value" TYPE="char" LENGTH="128" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="private access key value" PREVIOUS="script" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="owner" PREVIOUS="value" NEXT="instance"/>
        <FIELD NAME="instance" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="optional instance id" PREVIOUS="userid" NEXT="iprestriction"/>
        <FIELD NAME="iprestriction" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" COMMENT="ip restriction" PREVIOUS="instance" NEXT="validuntil"/>
        <FIELD NAME="validuntil" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="timestampt - valid until data" PREVIOUS="iprestriction" NEXT="timecreated"/>
        <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="false" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="created timestamp" PREVIOUS="validuntil"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="userid"/>
        <KEY NAME="userid" TYPE="foreign" FIELDS="userid" REFTABLE="user" REFFIELDS="id" COMMENT="id from user table" PREVIOUS="primary"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="script-value" UNIQUE="false" FIELDS="script, value" COMMENT="index used for key validation"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="grade_letters" COMMENT="Repository for grade letters, for courses and other moodle entities that use grades." PREVIOUS="user_private_key" NEXT="cache_flags">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="contextid"/>
        <FIELD NAME="contextid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" COMMENT="What contextid does this letter apply to (for now these will always be courses, but later...)" PREVIOUS="id" NEXT="lowerboundary"/>
        <FIELD NAME="lowerboundary" TYPE="number" LENGTH="10" NOTNULL="true" UNSIGNED="false" SEQUENCE="false" ENUM="false" DECIMALS="5" COMMENT="The lower boundary of the letter. Its upper boundary is the lower boundary of the next highest letter, unless there is none above, in which case it's grademax for that grade_item." PREVIOUS="contextid" NEXT="letter"/>
        <FIELD NAME="letter" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" COMMENT="The display value of the letter. Can be any character or string of characters (OK, A, 10% etc..)" PREVIOUS="lowerboundary"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="contextid-lowerboundary" UNIQUE="false" FIELDS="contextid, lowerboundary" COMMENT="index used when fetching context letters"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="cache_flags" COMMENT="Cache of time-sensitive flags" PREVIOUS="grade_letters" NEXT="grade_settings">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="flagtype"/>
        <FIELD NAME="flagtype" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="flagtype" NEXT="timemodified"/>
        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="value"/>
        <FIELD NAME="value" TYPE="text" LENGTH="medium" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="timemodified" NEXT="expiry"/>
        <FIELD NAME="expiry" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="value"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="flagtype" UNIQUE="false" FIELDS="flagtype" NEXT="name"/>
        <INDEX NAME="name" UNIQUE="false" FIELDS="name" PREVIOUS="flagtype"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="grade_settings" COMMENT="gradebook settings" PREVIOUS="cache_flags" NEXT="webdav_locks">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="courseid"/>
        <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="courseid" NEXT="value"/>
        <FIELD NAME="value" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="name"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="courseid"/>
        <KEY NAME="courseid" TYPE="foreign" FIELDS="courseid" REFTABLE="course" REFFIELDS="id" PREVIOUS="primary"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="courseid-name" UNIQUE="true" FIELDS="courseid, name"/>
      </INDEXES>
    </TABLE>
    <TABLE NAME="webdav_locks" COMMENT="Resource locks for WebDAV users" PREVIOUS="grade_settings">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="token"/>
        <FIELD NAME="token" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="path"/>
        <FIELD NAME="path" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="token" NEXT="expiry"/>
        <FIELD NAME="expiry" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="path" NEXT="userid"/>
        <FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="expiry" NEXT="recursive"/>
        <FIELD NAME="recursive" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="userid" NEXT="exclusivelock"/>
        <FIELD NAME="exclusivelock" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="recursive" NEXT="created"/>
        <FIELD NAME="created" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="exclusivelock" NEXT="modified"/>
        <FIELD NAME="modified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="created" NEXT="owner"/>
        <FIELD NAME="owner" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="modified"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="token"/>
        <KEY NAME="token" TYPE="unique" FIELDS="token" PREVIOUS="primary"/>
      </KEYS>
      <INDEXES>
        <INDEX NAME="path" UNIQUE="false" FIELDS="path" NEXT="expiry"/>
        <INDEX NAME="expiry" UNIQUE="false" FIELDS="expiry" PREVIOUS="path"/>
      </INDEXES>
    </TABLE>
  </TABLES>
  <STATEMENTS>
    <STATEMENT NAME="insert mnet_application" TYPE="insert" TABLE="mnet_application" COMMENT="Initial insert of records on table mnet_application" NEXT="insert log_display">
      <SENTENCES>
        <SENTENCE TEXT="(name, display_name, xmlrpc_server_url, sso_land_url) VALUES ('moodle','Moodle','/mnet/xmlrpc/server.php', '/auth/mnet/land.php')" />
        <SENTENCE TEXT="(name, display_name, xmlrpc_server_url, sso_land_url) VALUES ('mahara','Mahara','/api/xmlrpc/server.php',  '/auth/xmlrpc/land.php')" />
      </SENTENCES>
    </STATEMENT>
    <STATEMENT NAME="insert log_display" TYPE="insert" TABLE="log_display" COMMENT="Initial insert of records on table log_display" PREVIOUS="insert mnet_application">
      <SENTENCES>
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('user', 'view', 'user', 'CONCAT(firstname,&quot; &quot;,lastname)')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('course', 'user report', 'user', 'CONCAT(firstname,&quot; &quot;,lastname)')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('course', 'view', 'course', 'fullname')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('course', 'update', 'course', 'fullname')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('course', 'enrol', 'course', 'fullname')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('course', 'unenrol', 'course', 'fullname')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('course', 'report log', 'course', 'fullname')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('course', 'report live', 'course', 'fullname')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('course', 'report outline', 'course', 'fullname')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('course', 'report participation', 'course', 'fullname')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('course', 'report stats', 'course', 'fullname')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('message', 'write', 'user', 'CONCAT(firstname,&quot; &quot;,lastname)')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('message', 'read', 'user', 'CONCAT(firstname,&quot; &quot;,lastname)')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('message', 'add contact', 'user', 'CONCAT(firstname,&quot; &quot;,lastname)')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('message', 'remove contact', 'user', 'CONCAT(firstname,&quot; &quot;,lastname)')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('message', 'block contact', 'user', 'CONCAT(firstname,&quot; &quot;,lastname)')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('message', 'unblock contact', 'user', 'CONCAT(firstname,&quot; &quot;,lastname)')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('group', 'view', 'groups', 'name')" />
        <SENTENCE TEXT="(module, action, mtable, field) VALUES ('tag', 'update', 'tag', 'name')" />
      </SENTENCES>
    </STATEMENT>
  </STATEMENTS>
</XMLDB>