<?xml version="1.0" encoding="utf-8"?>
<!--
     The DocBook Schema Version 5.2
     OASIS Standard
     06 February 2024
     Copyright (c) OASIS Open 2024. All Rights Reserved.
     Source: https://docs.oasis-open.org/docbook/docbook/v5.2/os/sch/
     Link to latest version of specification: https://docs.oasis-open.org/docbook/docbook/v5.2/docbook-v5.2.html
-->
<s:schema xmlns:db="http://docbook.org/ns/docbook"
           xmlns:rng="http://relaxng.org/ns/structure/1.0"
           xmlns:s="http://purl.oclc.org/dsdl/schematron"
           queryBinding="xslt2">
   <s:ns prefix="db" uri="http://docbook.org/ns/docbook"/>
   <s:ns prefix="xlink" uri="http://www.w3.org/1999/xlink"/>
   <s:ns prefix="trans" uri="http://docbook.org/ns/transclusion"/>
   <s:pattern>
      <s:title>Callout cross reference constraint</s:title>
      <s:rule context="db:callout[@arearefs]">
         <s:assert test="every $id in tokenize(current()/@arearefs) satisfies (every $ar in //*[@xml:id = $id] satisfies (local-name($ar) = ('areaset', 'area', 'co') and namespace-uri($ar) = 'http://docbook.org/ns/docbook'))">@arearefs on callout must point to a areaset, area, or co.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Cardinality of segments and titles</s:title>
      <s:rule context="db:seglistitem">
         <s:assert test="count(db:seg) = count(../db:segtitle)">The number of seg elements must be the same as the number of segtitle elements in the parent segmentedlist</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Constraint cross reference constraint</s:title>
      <s:rule context="db:constraint[@linkend]">
         <s:assert test="local-name(//*[@xml:id=current()/@linkend]) = 'constraintdef' and namespace-uri(//*[@xml:id=current()/@linkend]) = 'http://docbook.org/ns/docbook'">@linkend on constraint must point to a constraintdef.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Element exclusion</s:title>
      <s:rule context="db:annotation">
         <s:assert test="not(.//db:annotation)">annotation must not occur among the children or descendants of annotation</s:assert>
      </s:rule>
      <s:rule context="db:caution">
         <s:assert test="not(.//db:caution)">caution must not occur among the children or descendants of caution</s:assert>
         <s:assert test="not(.//db:danger)">danger must not occur among the children or descendants of caution</s:assert>
         <s:assert test="not(.//db:important)">important must not occur among the children or descendants of caution</s:assert>
         <s:assert test="not(.//db:note)">note must not occur among the children or descendants of caution</s:assert>
         <s:assert test="not(.//db:tip)">tip must not occur among the children or descendants of caution</s:assert>
         <s:assert test="not(.//db:warning)">warning must not occur among the children or descendants of caution</s:assert>
      </s:rule>
      <s:rule context="db:danger">
         <s:assert test="not(.//db:caution)">caution must not occur among the children or descendants of danger</s:assert>
         <s:assert test="not(.//db:danger)">danger must not occur among the children or descendants of danger</s:assert>
         <s:assert test="not(.//db:important)">important must not occur among the children or descendants of danger</s:assert>
         <s:assert test="not(.//db:note)">note must not occur among the children or descendants of danger</s:assert>
         <s:assert test="not(.//db:tip)">tip must not occur among the children or descendants of danger</s:assert>
         <s:assert test="not(.//db:warning)">warning must not occur among the children or descendants of danger</s:assert>
      </s:rule>
      <s:rule context="db:important">
         <s:assert test="not(.//db:caution)">caution must not occur among the children or descendants of important</s:assert>
         <s:assert test="not(.//db:danger)">danger must not occur among the children or descendants of important</s:assert>
         <s:assert test="not(.//db:important)">important must not occur among the children or descendants of important</s:assert>
         <s:assert test="not(.//db:note)">note must not occur among the children or descendants of important</s:assert>
         <s:assert test="not(.//db:tip)">tip must not occur among the children or descendants of important</s:assert>
         <s:assert test="not(.//db:warning)">warning must not occur among the children or descendants of important</s:assert>
      </s:rule>
      <s:rule context="db:note">
         <s:assert test="not(.//db:caution)">caution must not occur among the children or descendants of note</s:assert>
         <s:assert test="not(.//db:danger)">danger must not occur among the children or descendants of note</s:assert>
         <s:assert test="not(.//db:important)">important must not occur among the children or descendants of note</s:assert>
         <s:assert test="not(.//db:note)">note must not occur among the children or descendants of note</s:assert>
         <s:assert test="not(.//db:tip)">tip must not occur among the children or descendants of note</s:assert>
         <s:assert test="not(.//db:warning)">warning must not occur among the children or descendants of note</s:assert>
      </s:rule>
      <s:rule context="db:tip">
         <s:assert test="not(.//db:caution)">caution must not occur among the children or descendants of tip</s:assert>
         <s:assert test="not(.//db:danger)">danger must not occur among the children or descendants of tip</s:assert>
         <s:assert test="not(.//db:important)">important must not occur among the children or descendants of tip</s:assert>
         <s:assert test="not(.//db:note)">note must not occur among the children or descendants of tip</s:assert>
         <s:assert test="not(.//db:tip)">tip must not occur among the children or descendants of tip</s:assert>
         <s:assert test="not(.//db:warning)">warning must not occur among the children or descendants of tip</s:assert>
      </s:rule>
      <s:rule context="db:warning">
         <s:assert test="not(.//db:caution)">caution must not occur among the children or descendants of warning</s:assert>
         <s:assert test="not(.//db:danger)">danger must not occur among the children or descendants of warning</s:assert>
         <s:assert test="not(.//db:important)">important must not occur among the children or descendants of warning</s:assert>
         <s:assert test="not(.//db:note)">note must not occur among the children or descendants of warning</s:assert>
         <s:assert test="not(.//db:tip)">tip must not occur among the children or descendants of warning</s:assert>
         <s:assert test="not(.//db:warning)">warning must not occur among the children or descendants of warning</s:assert>
      </s:rule>
      <s:rule context="db:caption">
         <s:assert test="not(.//db:caution)">caution must not occur among the children or descendants of caption</s:assert>
         <s:assert test="not(.//db:danger)">danger must not occur among the children or descendants of caption</s:assert>
         <s:assert test="not(.//db:equation)">equation must not occur among the children or descendants of caption</s:assert>
         <s:assert test="not(.//db:example)">example must not occur among the children or descendants of caption</s:assert>
         <s:assert test="not(.//db:figure)">figure must not occur among the children or descendants of caption</s:assert>
         <s:assert test="not(.//db:important)">important must not occur among the children or descendants of caption</s:assert>
         <s:assert test="not(.//db:note)">note must not occur among the children or descendants of caption</s:assert>
         <s:assert test="not(.//db:sidebar)">sidebar must not occur among the children or descendants of caption</s:assert>
         <s:assert test="not(.//db:table)">table must not occur among the children or descendants of caption</s:assert>
         <s:assert test="not(.//db:task)">task must not occur among the children or descendants of caption</s:assert>
         <s:assert test="not(.//db:tip)">tip must not occur among the children or descendants of caption</s:assert>
         <s:assert test="not(.//db:warning)">warning must not occur among the children or descendants of caption</s:assert>
      </s:rule>
      <s:rule context="db:equation">
         <s:assert test="not(.//db:equation)">equation must not occur among the children or descendants of equation</s:assert>
         <s:assert test="not(.//db:example)">example must not occur among the children or descendants of equation</s:assert>
         <s:assert test="not(.//db:figure)">figure must not occur among the children or descendants of equation</s:assert>
         <s:assert test="not(.//db:table)">table must not occur among the children or descendants of equation</s:assert>
      </s:rule>
      <s:rule context="db:example">
         <s:assert test="not(.//db:equation)">equation must not occur among the children or descendants of example</s:assert>
         <s:assert test="not(.//db:example)">example must not occur among the children or descendants of example</s:assert>
         <s:assert test="not(.//db:figure)">figure must not occur among the children or descendants of example</s:assert>
         <s:assert test="not(.//db:table)">table must not occur among the children or descendants of example</s:assert>
      </s:rule>
      <s:rule context="db:figure">
         <s:assert test="not(.//db:equation)">equation must not occur among the children or descendants of figure</s:assert>
         <s:assert test="not(.//db:example)">example must not occur among the children or descendants of figure</s:assert>
         <s:assert test="not(.//db:figure)">figure must not occur among the children or descendants of figure</s:assert>
         <s:assert test="not(.//db:table)">table must not occur among the children or descendants of figure</s:assert>
      </s:rule>
      <s:rule context="db:table">
         <s:assert test="not(.//db:equation)">equation must not occur among the children or descendants of table</s:assert>
         <s:assert test="not(.//db:example)">example must not occur among the children or descendants of table</s:assert>
         <s:assert test="not(.//db:figure)">figure must not occur among the children or descendants of table</s:assert>
      </s:rule>
      <s:rule context="db:footnote">
         <s:assert test="not(.//db:caution)">caution must not occur among the children or descendants of footnote</s:assert>
         <s:assert test="not(.//db:danger)">danger must not occur among the children or descendants of footnote</s:assert>
         <s:assert test="not(.//db:epigraph)">epigraph must not occur among the children or descendants of footnote</s:assert>
         <s:assert test="not(.//db:equation)">equation must not occur among the children or descendants of footnote</s:assert>
         <s:assert test="not(.//db:example)">example must not occur among the children or descendants of footnote</s:assert>
         <s:assert test="not(.//db:figure)">figure must not occur among the children or descendants of footnote</s:assert>
         <s:assert test="not(.//db:footnote)">footnote must not occur among the children or descendants of footnote</s:assert>
         <s:assert test="not(.//db:important)">important must not occur among the children or descendants of footnote</s:assert>
         <s:assert test="not(.//db:note)">note must not occur among the children or descendants of footnote</s:assert>
         <s:assert test="not(.//db:sidebar)">sidebar must not occur among the children or descendants of footnote</s:assert>
         <s:assert test="not(.//db:table)">table must not occur among the children or descendants of footnote</s:assert>
         <s:assert test="not(.//db:task)">task must not occur among the children or descendants of footnote</s:assert>
         <s:assert test="not(.//db:tip)">tip must not occur among the children or descendants of footnote</s:assert>
         <s:assert test="not(.//db:warning)">warning must not occur among the children or descendants of footnote</s:assert>
      </s:rule>
      <s:rule context="db:sidebar">
         <s:assert test="not(.//db:sidebar)">sidebar must not occur among the children or descendants of sidebar</s:assert>
      </s:rule>
      <s:rule context="db:entry">
         <s:assert test="not(.//db:informaltable)">informaltable must not occur among the children or descendants of entry</s:assert>
         <s:assert test="not(.//db:table)">table must not occur among the children or descendants of entry</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Footnote reference type constraint</s:title>
      <s:rule context="db:footnoteref">
         <s:assert test="local-name(//*[@xml:id=current()/@linkend]) = 'footnote' and namespace-uri(//*[@xml:id=current()/@linkend]) = 'http://docbook.org/ns/docbook'">@linkend on footnoteref must point to a footnote.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Glossary 'firstterm' type constraint</s:title>
      <s:rule context="db:firstterm[@linkend]">
         <s:assert test="local-name(//*[@xml:id=current()/@linkend]) = 'glossentry' and namespace-uri(//*[@xml:id=current()/@linkend]) = 'http://docbook.org/ns/docbook'">@linkend on firstterm must point to a glossentry.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Glossary 'glossterm' type constraint</s:title>
      <s:rule context="db:glossterm[@linkend]">
         <s:assert test="local-name(//*[@xml:id=current()/@linkend]) = 'glossentry' and namespace-uri(//*[@xml:id=current()/@linkend]) = 'http://docbook.org/ns/docbook'">@linkend on glossterm must point to a glossentry.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Glossary 'seealso' type constraint</s:title>
      <s:rule context="db:glossseealso[@otherterm]">
         <s:assert test="local-name(//*[@xml:id=current()/@otherterm]) = 'glossentry' and namespace-uri(//*[@xml:id=current()/@otherterm]) = 'http://docbook.org/ns/docbook'">@otherterm on glossseealso must point to a glossentry.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Glossary term definition constraint</s:title>
      <s:rule context="db:termdef">
         <s:assert test="count(db:firstterm) = 1">A termdef must contain exactly one firstterm</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Glosssary 'see' type constraint</s:title>
      <s:rule context="db:glosssee[@otherterm]">
         <s:assert test="local-name(//*[@xml:id=current()/@otherterm]) = 'glossentry' and namespace-uri(//*[@xml:id=current()/@otherterm]) = 'http://docbook.org/ns/docbook'">@otherterm on glosssee must point to a glossentry.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Indexterm 'startref' type constraint</s:title>
      <s:rule context="db:indexterm[@startref]">
         <s:assert test="//*[@xml:id=current()/@startref]/@class='startofrange'">@startref on indexterm must point to a startofrange indexterm.</s:assert>
         <s:assert test="local-name(//*[@xml:id=current()/@startref]) = 'indexterm' and namespace-uri(//*[@xml:id=current()/@startref]) = 'http://docbook.org/ns/docbook'">@startref on indexterm must point to an indexterm.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Production recap cross reference constraint</s:title>
      <s:rule context="db:productionrecap[@linkend]">
         <s:assert test="local-name(//*[@xml:id=current()/@linkend]) = 'production' and namespace-uri(//*[@xml:id=current()/@linkend]) = 'http://docbook.org/ns/docbook'">@linkend on productionrecap must point to a production.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Root must have version</s:title>
      <s:rule context="/db:info">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:procedure">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:step">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:stepalternatives">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:sidebar">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:abstract">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:personblurb">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:blockquote">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:epigraph">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:formalpara">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:para">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:simpara">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:itemizedlist">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:orderedlist">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:segmentedlist">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:simplelist">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:variablelist">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:example">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:informalexample">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:literallayout">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:screen">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:screenshot">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:figure">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:informalfigure">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:mediaobject">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:inlinemediaobject">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:videoobject">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:audioobject">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:imageobject">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:textobject">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:videodata">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:audiodata">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:imagedata">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:textdata">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:caption">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:address">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:legalnotice">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:revhistory">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:formalgroup">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:set">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:book">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:dedication">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:acknowledgements">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:colophon">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:appendix">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:chapter">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:part">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:preface">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:partintro">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:section">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:simplesect">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:article">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:annotation">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:sect1">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:sect2">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:sect3">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:sect4">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:sect5">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:reference">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:refentry">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:refsynopsisdiv">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:refsection">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:refsect1">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:refsect2">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:refsect3">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:glosslist">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:glossary">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:glossdiv">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:bibliography">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:bibliodiv">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:bibliolist">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:index">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:setindex">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:indexdiv">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:toc">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:tocdiv">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:task">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:tasksummary">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:taskprerequisites">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:taskrelated">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:calloutlist">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:programlistingco">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:screenco">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:imageobjectco">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:productionset">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:constraintdef">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:table">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:informaltable">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:msgset">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:msg">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:msgmain">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:msgsub">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:msgrel">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:msgexplan">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:qandaset">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:qandadiv">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:qandaentry">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:equation">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:informalequation">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:cmdsynopsis">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:synopsis">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:funcsynopsis">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:funcsynopsisinfo">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:classsynopsis">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:classsynopsisinfo">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:fieldsynopsis">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:constructorsynopsis">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:destructorsynopsis">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:methodsynopsis">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:packagesynopsis">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:macrosynopsis">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:unionsynopsis">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:enumsynopsis">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:typedefsynopsis">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:programlisting">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:caution">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:danger">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:important">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:note">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:tip">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:warning">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
      <s:rule context="/db:topic">
         <s:assert test="@version">If this element is the root element, it must have a version attribute.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Suffix fixup must be specified</s:title>
      <s:rule context="db:*[@trans:suffix]">
         <s:assert test="@trans:idfixup = 'suffix'">If a suffix is specified, suffix ID fixup must also be specified.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>Synopsis fragment type constraint</s:title>
      <s:rule context="db:synopfragmentref">
         <s:assert test="local-name(//*[@xml:id=current()/@linkend]) = 'synopfragment' and namespace-uri(//*[@xml:id=current()/@linkend]) = 'http://docbook.org/ns/docbook'">@linkend on synopfragmentref must point to a synopfragment.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>XLink arc placement</s:title>
      <s:rule context="*[@xlink:type='arc']">
         <s:assert test="parent::*[@xlink:type='extended']">An XLink arc type element must occur as the direct child of an XLink extended type element.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>XLink extended placement</s:title>
      <s:rule context="*[@xlink:type='extended']">
         <s:assert test="not(parent::*[@xlink:type='extended'])">An XLink extended type element may not occur as the direct child of an XLink extended type element.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>XLink locator placement</s:title>
      <s:rule context="*[@xlink:type='locator']">
         <s:assert test="parent::*[@xlink:type='extended']">An XLink locator type element must occur as the direct child of an XLink extended type element.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>XLink resource placement</s:title>
      <s:rule context="*[@xlink:type='resource']">
         <s:assert test="parent::*[@xlink:type='extended']">An XLink resource type element must occur as the direct child of an XLink extended type element.</s:assert>
      </s:rule>
   </s:pattern>
   <s:pattern>
      <s:title>XLink title placement</s:title>
      <s:rule context="*[@xlink:type='title']">
         <s:assert test="parent::*[@xlink:type='extended'] or parent::*[@xlink:type='locator'] or parent::*[@xlink:type='arc']">An XLink title type element must occur as the direct child of an XLink extended, locator, or arc type element.</s:assert>
      </s:rule>
   </s:pattern>
</s:schema>