<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="http://www.w3.org/1999/xlink" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:docbook="http://docbook.org/ns/docbook">
  <xs:attribute name="href"/>
  <xs:attribute name="type"/>
  <xs:attribute name="role"/>
  <xs:attribute name="arcrole"/>
  <xs:attribute name="title"/>
  <xs:attribute name="show">
    <xs:simpleType>
      <xs:restriction base="xs:token">
        <xs:enumeration value="new"/>
        <xs:enumeration value="replace"/>
        <xs:enumeration value="embed"/>
        <xs:enumeration value="other"/>
        <xs:enumeration value="none"/>
      </xs:restriction>
    </xs:simpleType>
  </xs:attribute>
  <xs:attribute name="actuate">
    <xs:simpleType>
      <xs:restriction base="xs:token">
        <xs:enumeration value="onLoad"/>
        <xs:enumeration value="onRequest"/>
        <xs:enumeration value="other"/>
        <xs:enumeration value="none"/>
      </xs:restriction>
    </xs:simpleType>
  </xs:attribute>
  <xs:attribute name="label" type="xs:NMTOKEN"/>
  <xs:attribute name="from" type="xs:NMTOKEN"/>
  <xs:attribute name="to" type="xs:NMTOKEN"/>
</xs:schema>
