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<refentry id="constraint.element" revision='EBNF'>
<?dbhtml filename="constraint.html"?>
<refentryinfo>
<pubdate>$Date$</pubdate>
<releaseinfo>$Revision$</releaseinfo>
</refentryinfo>
<refmeta>
<indexterm><primary>elements</primary>
<secondary>constraint</secondary></indexterm>
<refentrytitle>constraint</refentrytitle>
<refmiscinfo>Element</refmiscinfo>
</refmeta>
<refnamediv>
<refname>constraint</refname>
<refpurpose>&constraint.purpose;</refpurpose>
</refnamediv>
&constraint.synopsis.gen;
<refsect1 condition='ref.description'><title>Description</title>
<para>This element is only available if you are using the
<link linkend="ebnf.module">EBNF Module</link>.</para>
<para>A <sgmltag>Constraint</sgmltag> is a cross-reference to a
description of a constraint that cannot be expressed in the grammar
(generally logical rather than syntactic constraints).</para>
&constraint.parents.gen;
</refsect1>
<refsect1 condition='ref.elem.attrdesc'><title>Attributes</title>
<variablelist>
<varlistentry><term>linkend</term>
<listitem>
<para revision="EBNF">FIXME:</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1><title>Examples</title>
&constraint.example.seealso.gen;
</refsect1>
</refentry>
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