| <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="man.charmap.use.subset"> |
| <refmeta> |
| <refentrytitle>man.charmap.use.subset</refentrytitle> |
| <refmiscinfo class="other" otherclass="datatype">boolean</refmiscinfo> |
| </refmeta> |
| <refnamediv> |
| <refname>man.charmap.use.subset</refname> |
| <refpurpose>Use subset of character map instead of full map?</refpurpose> |
| </refnamediv> |
| |
| <refsynopsisdiv> |
| <src:fragment xml:id="man.charmap.use.subset.frag"> |
| <xsl:param name="man.charmap.use.subset" select="1"/> |
| </src:fragment> |
| </refsynopsisdiv> |
| |
| <refsection><info><title>Description</title></info> |
| |
| <para>If the value of the |
| <parameter>man.charmap.use.subset</parameter> parameter is non-zero, |
| a subset of the roff character map is used instead of the full roff |
| character map. The profile of the subset used is determined either |
| by the value of the |
| <parameter>man.charmap.subset.profile</parameter> |
| parameter (if the source is not in English) or the |
| <parameter>man.charmap.subset.profile.english</parameter> |
| parameter (if the source is in English).</para> |
| |
| <note> |
| <para>You may want to experiment with setting a non-zero value of |
| <parameter>man.charmap.use.subset</parameter>, so that the full |
| character map is used. Depending on which XSLT engine you run, |
| setting a non-zero value for |
| <parameter>man.charmap.use.subset</parameter> may significantly |
| increase the time needed to process your documents. Or it may |
| not. For example, if you set it and run it with xsltproc, it seems |
| to dramatically increase processing time; on the other hand, if you |
| set it and run it with Saxon, it does not seem to increase |
| processing time nearly as much.</para> |
| |
| <para>If processing time is not a important concern and/or you can |
| tolerate the increase in processing time imposed by using the full |
| character map, set <parameter>man.charmap.use.subset</parameter> to |
| zero.</para> |
| </note> |
| |
| <refsection><info><title>Details</title></info> |
| |
| <para>For converting certain Unicode symbols and special characters in |
| UTF-8 or UTF-16 encoded XML source to appropriate groff/roff |
| equivalents in man-page output, the DocBook XSL Stylesheets |
| distribution includes a <link xlink:href="http://docbook.sourceforge.net/snapshot/xsl/manpages/charmap.groff.xsl">roff character map</link> that is compliant with the <link xlink:href="http://www.w3.org/TR/xslt20/#character-maps">XSLT character |
| map</link> format as detailed in the XSLT 2.0 specification. The map |
| contains more than 800 character mappings and can be considered the |
| standard roff character map for the distribution.</para> |
| |
| <note> |
| <para>You can use the <parameter>man.charmap.uri</parameter> |
| parameter to specify a URI for the location for an alternate roff |
| character map to use in place of the standard roff character map |
| provided in the distribution.</para> |
| </note> |
| |
| <para>Because it is not terrifically efficient to use the standard |
| 800-character character map in full -- and for most (or all) users, |
| never necessary to use it in full -- the DocBook XSL Stylesheets |
| support a mechanism for using, within any given character map, a |
| subset of character mappings instead of the full set. You can use the |
| <parameter>man.charmap.subset.profile</parameter> or |
| <parameter>man.charmap.subset.profile.english</parameter> |
| parameter to tune the profile of that subset to use.</para> |
| |
| </refsection> |
| </refsection> |
| </refentry> |