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<title>GNU Texinfo 5.2: Customization Variables</title>

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<a name="Customization-Variables"></a>
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<p>
Next: <a href="Internationalization-of-Document-Strings.html#Internationalization-of-Document-Strings" accesskey="n" rel="next">Internationalization of Document Strings</a>, Previous: <a href="Pointer-Validation.html#Pointer-Validation" accesskey="p" rel="previous">Pointer Validation</a>, Up: <a href="Generic-Translator-texi2any.html#Generic-Translator-texi2any" accesskey="u" rel="up">Generic Translator <tt>texi2any</tt></a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Command-and-Variable-Index.html#Command-and-Variable-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="Customization-Variables-1"></a>
<h3 class="section">22.5 Customization Variables</h3>

<blockquote>
<p><b>Warning:</b> These customization variable names and meanings may change in any
Texinfo release.  We always try to avoid incompatible changes, but we
cannot absolutely promise, since needs change over time.
</p></blockquote>

<p>Many aspects of the behavior and output of <code>texi2any</code> may be
modified by modifying so-called <em>customization variables</em>.  These
fall into a few general categories:
</p>
<ul>
<li> Those associated with @-commands; for example,
<code>@documentlanguage</code>.

</li><li> Those associated with command-line options; for example, the
customization variable <code>SPLIT</code> is associated with the
<samp>--split</samp> command-line option, and <code>TEXINFO_OUTPUT_FORMAT</code>
allows specifying the output format.

</li><li> Those associated with customizing the HTML output.

</li><li> Other ad hoc variables.
</li></ul>

<p>Customization variables may set on the command line using
<code>--set-customization-variable '<var>var</var> <var>value</var>'</code> (quoting
the variable/value pair to the shell) or
<code>--set-customization-variable <var>var</var>=<var>value</var></code> (using
<code>=</code>).  A special <var>value</var> is &lsquo;<samp>undef</samp>&rsquo;, which sets the
variable to this special &ldquo;undefined&rdquo; Perl value.
</p>
<p>The sections below give the details for each of these.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">&bull; <a href="Customization-Variables-for-_0040_002dCommands.html#Customization-Variables-for-_0040_002dCommands" accesskey="1">Commands</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Customization-Variables-and-Options.html#Customization-Variables-and-Options" accesskey="2">Options</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="HTML-Customization-Variables.html#HTML-Customization-Variables" accesskey="3">HTML</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Other-Customization-Variables.html#Other-Customization-Variables" accesskey="4">Other</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>





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