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+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink"
+          xmlns:xi="http://www.w3.org/2001/XInclude"
+          xmlns:src="http://nwalsh.com/xmlns/litprog/fragment"
+          xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+          version="5.0" xml:id="ebnf.assignment">
+<refmeta>
+<refentrytitle>ebnf.assignment</refentrytitle>
+<refmiscinfo class="other" otherclass="datatype">rtf</refmiscinfo>
+</refmeta>
+<refnamediv>
+<refname>ebnf.assignment</refname>
+<refpurpose>The EBNF production assignment operator</refpurpose>
+</refnamediv>
+
+<refsynopsisdiv>
+<src:fragment xml:id="ebnf.assignment.frag">
+<xsl:param condition="html" name="ebnf.assignment">
+<code xmlns="">::=</code>
+</xsl:param>
+<xsl:param xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" condition="fo" name="ebnf.assignment">
+  <fo:inline font-family="{$monospace.font.family}">
+    <xsl:text>::=</xsl:text>
+  </fo:inline>
+</xsl:param>
+</src:fragment>
+</refsynopsisdiv>
+
+<refsection><info><title>Description</title></info>
+
+<para>The <parameter>ebnf.assignment</parameter> parameter determines what
+text is used to show <quote>assignment</quote> in <tag>production</tag>s
+in <tag>productionset</tag>s.</para>
+
+<para>While <quote><literal>::=</literal></quote> is common, so are several
+other operators.</para>
+
+</refsection>
+</refentry>