[15c7d39] | 1 | <refentry xmlns="http://docbook.org/ns/docbook"
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| 2 | xmlns:xlink="http://www.w3.org/1999/xlink"
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| 3 | xmlns:xi="http://www.w3.org/2001/XInclude"
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| 4 | xmlns:src="http://nwalsh.com/xmlns/litprog/fragment"
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| 5 | xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
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| 6 | version="5.0" xml:id="man.charmap.use.subset">
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| 7 | <refmeta>
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| 8 | <refentrytitle>man.charmap.use.subset</refentrytitle>
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| 9 | <refmiscinfo class="other" otherclass="datatype">boolean</refmiscinfo>
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| 10 | </refmeta>
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| 11 | <refnamediv>
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| 12 | <refname>man.charmap.use.subset</refname>
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| 13 | <refpurpose>Use subset of character map instead of full map?</refpurpose>
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| 14 | </refnamediv>
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| 15 |
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| 16 | <refsynopsisdiv>
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| 17 | <src:fragment xml:id="man.charmap.use.subset.frag">
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| 18 | <xsl:param name="man.charmap.use.subset" select="1"/>
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| 19 | </src:fragment>
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| 20 | </refsynopsisdiv>
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| 21 |
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| 22 | <refsection><info><title>Description</title></info>
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| 23 |
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| 24 | <para>If the value of the
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| 25 | <parameter>man.charmap.use.subset</parameter> parameter is non-zero,
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| 26 | a subset of the roff character map is used instead of the full roff
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| 27 | character map. The profile of the subset used is determined either
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| 28 | by the value of the
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| 29 | <parameter>man.charmap.subset.profile</parameter>
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| 30 | parameter (if the source is not in English) or the
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| 31 | <parameter>man.charmap.subset.profile.english</parameter>
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| 32 | parameter (if the source is in English).</para>
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| 33 |
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| 34 | <note>
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| 35 | <para>You may want to experiment with setting a non-zero value of
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| 36 | <parameter>man.charmap.use.subset</parameter>, so that the full
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| 37 | character map is used. Depending on which XSLT engine you run,
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| 38 | setting a non-zero value for
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| 39 | <parameter>man.charmap.use.subset</parameter> may significantly
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| 40 | increase the time needed to process your documents. Or it may
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| 41 | not. For example, if you set it and run it with xsltproc, it seems
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| 42 | to dramatically increase processing time; on the other hand, if you
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| 43 | set it and run it with Saxon, it does not seem to increase
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| 44 | processing time nearly as much.</para>
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| 45 |
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| 46 | <para>If processing time is not a important concern and/or you can
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| 47 | tolerate the increase in processing time imposed by using the full
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| 48 | character map, set <parameter>man.charmap.use.subset</parameter> to
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| 49 | zero.</para>
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| 50 | </note>
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| 51 |
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| 52 | <refsection><info><title>Details</title></info>
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| 53 |
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| 54 | <para>For converting certain Unicode symbols and special characters in
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| 55 | UTF-8 or UTF-16 encoded XML source to appropriate groff/roff
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| 56 | equivalents in man-page output, the DocBook XSL Stylesheets
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| 57 | 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
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| 58 | map</link> format as detailed in the XSLT 2.0 specification. The map
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| 59 | contains more than 800 character mappings and can be considered the
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| 60 | standard roff character map for the distribution.</para>
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| 61 |
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| 62 | <note>
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| 63 | <para>You can use the <parameter>man.charmap.uri</parameter>
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| 64 | parameter to specify a URI for the location for an alternate roff
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| 65 | character map to use in place of the standard roff character map
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| 66 | provided in the distribution.</para>
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| 67 | </note>
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| 68 |
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| 69 | <para>Because it is not terrifically efficient to use the standard
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| 70 | 800-character character map in full -- and for most (or all) users,
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| 71 | never necessary to use it in full -- the DocBook XSL Stylesheets
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| 72 | support a mechanism for using, within any given character map, a
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| 73 | subset of character mappings instead of the full set. You can use the
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| 74 | <parameter>man.charmap.subset.profile</parameter> or
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| 75 | <parameter>man.charmap.subset.profile.english</parameter>
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| 76 | parameter to tune the profile of that subset to use.</para>
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| 77 |
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| 78 | </refsection>
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| 79 | </refsection>
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| 80 | </refentry>
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