</section>
-<section xml:id="docbook">
+<section xml:id="s.docbook">
<title>The DocBook RELAX NG Schema V5.0</title>
<para>The DocBook <link xlink:href="&root;rng/">RELAX NG Schema</link> is distributed
to make <quote>unannounced</quote> backwards-incompatible changes for
this one release.</para>
-<section>
+<section xml:id="s.remvlegacy">
<title>Removing Legacy Elements</title>
<para>A number of elements have been removed from DocBook. Many of
</section>
-<section>
+<section xml:id="s.smaller.cm">
<title>Smaller Content Models</title>
<para>The content models of many inlines have been reduced, sometimes
with a single element name.</para>
</section>
-<section>
+<section xml:id="s.req.titles">
<title>Required Titles</title>
<para>DocBook V5.0 enforces the constraint that titles are required on
</section>
-<section>
+<section xml:id="s.req.version">
<title>Required Version</title>
<para>In DocBook V4.x and earlier, the presence of a document type declaration
</section>
-<section>
+<section xml:id="s.co-constraints">
<title>Co-Constraints</title>
<para>DocBook V5.0 enforces attribute co-constraints such as the
</section>
-<section>
+<section xml:id="s.tables">
<title>Improved HTML and CALS Table Support</title>
<para>In DocBook V5.0, HTML tables and CALS tables are independently specified.
</section>
-<section>
+<section xml:id="s.datatypes">
<title>Data Types</title>
<para>DocBook V5.0 adds a few simple data types. For example, the
</section>
</section>
-<section>
+<section xml:id="s.conversion">
<title>Conversion</title>
<para>There’s an XSLT 1.0 stylesheet for performing conversion from
</section>
</section>
-<section><title>Release Notes</title>
+<section xml:id="s.relnotes">
+<title>Release Notes</title>
<para>See <link xlink:href="http://www.relaxng.org/"/> for a list of tools that
can validate an XML document using RELAX NG. Note that not all products
<bibliography xml:id="references"><title>References</title>
-<bibliodiv><title>Normative</title>
+<bibliodiv xml:id="normative.refs"><title>Normative</title>
<bibliomixed xml:id="relaxng"/>
<bibliomixed xml:id="xml-rec"/>
</bibliodiv>
-<bibliodiv><title>Non-Normative</title>
+<bibliodiv xml:id="non-normative.refs"><title>Non-Normative</title>
<bibliomixed xml:id="iso8879"/>
<bibliomixed xml:id="xmlschema-1"/>