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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="monospace.verbatim.font.width">
+<refmeta>
+<refentrytitle>monospace.verbatim.font.width</refentrytitle>
+<refmiscinfo class="other" otherclass="datatype">length</refmiscinfo>
+</refmeta>
+<refnamediv>
+<refname>monospace.verbatim.font.width</refname>
+<refpurpose>Width of a single monospace font character</refpurpose>
+</refnamediv>
+
+<refsynopsisdiv>
+<src:fragment xml:id="monospace.verbatim.font.width.frag">
+<xsl:param name="monospace.verbatim.font.width">0.60em</xsl:param>
+</src:fragment>
+</refsynopsisdiv>
+
+<refsection><info><title>Description</title></info>
+
+<para>Specifies with em units the width of a single character
+of the monospace font. The default value is <literal>0.6em</literal>.</para>
+
+<para>This parameter is only used when a <tag>screen</tag>
+or <tag>programlisting</tag> element has a 
+<tag class="attribute">width</tag> attribute, which is
+expressed as a plain integer to indicate the maximum character count
+of each line.
+To convert this character count to an actual maximum width
+measurement, the width of the font characters must be provided.
+Different monospace fonts have different character width,
+so this parameter should be adjusted to fit the 
+monospace font being used.
+</para>
+
+</refsection>
+</refentry>