Alessandro Bonazzi
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52 lines
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Chapter 1. DocBook XSL</title><link rel="stylesheet" href="reference.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.37"><link rel="home" href="index.html" title="DocBook XSL Stylesheet Documentation"><link rel="up" href="index.html" title="DocBook XSL Stylesheet Documentation"><link rel="previous" href="pr01.html" title="Preface"><link rel="next" href="ch01s02.html" title="A brief introduction to XSL"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 1. DocBook XSL</th></tr><tr><td width="20%" align="left"><a href="pr01.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a href="ch01s02.html">Next</a></td></tr></table><hr></div><p>There is a growing list of tools to process DocBook
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documents using XSL stylesheets. Each tool implements parts
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or all of the XSL standard, which actually has several
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components:
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<div class="variablelist"><dl><dt><a name="c44b1b3b4b2b2b1"></a><span class="term">Extensible Stylesheet Language (XSL)</span></dt><dd><p><a name="c44b1b3b4b2b2b1b2"></a>A language for expressing stylesheets written
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in XML. It includes the formatting object language, but
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refers to separate documents for the transformation
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language and the path language.</p></dd><dt><a name="c44b1b3b4b2b2b2"></a><span class="term">XSL Transformation (XSLT)</span></dt><dd><p><a name="c44b1b3b4b2b2b2b2"></a>The part of XSL for transforming XML documents
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into other XML documents, HTML, or text. It can be used to
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rearrange the content and generate new content.</p></dd><dt><a name="c44b1b3b4b2b2b3"></a><span class="term">XML Path Language (XPath)</span></dt><dd><p><a name="c44b1b3b4b2b2b3b2"></a>A language for addressing parts of an XML
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document. It is used to find the parts of your document to
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apply different styles to. All XSL processors use this
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component.</p></dd></dl></div></p><p>To publish HTML from your XML documents, you just
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need an XSLT engine. To get to print, you need an XSLT
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engine to produce formatting objects (FO), which then must
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be processed with a formatting object processor to produce
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PostScript or PDF output.</p><p>James Clark's XT was the first useful XSLT engine,
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and it is still in wide use. It is written in Java, so it
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runs on many platforms, and it is free (
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<a href="http://www.jclark.com" target="_top">http://www.jclark.com</a>).
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XT comes with James Clark's nonvalidating parser XP, but
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you can substitute a different Java parser. Here is a
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simple example of using XT from the Unix command line to
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produce HTML: You'll need to alter your
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<i><tt>CLASSPATH</tt></i> environment variable to
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include the path to where you put the
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<tt>.jar</tt> files from the XT
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distribution.</p><pre class="screen">CLASSPATH=xt.jar:xp.jar:sax.jar
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export CLASSPATH
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java com.jclark.xsl.sax.Driver <i><tt>filename.xml</tt></i> <i><tt>docbook/html/docbook.xsl</tt></i> > <i><tt>output.html</tt></i></pre><p>If you replace the HTML stylesheet with a
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formatting object stylesheet, XT will produce a formatting
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object file. Then you can convert that to PDF using FOP, a
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formatting object processor available for free from the
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Apache XML Project (
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<a href="http://xml.apache.org" target="_top">http://xml.apache.org</a>).
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Here is an example of that two stage processing:</p><pre class="screen">CLASSPATH=xt.jar:xp.jar:sax.jar:fop.jar
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export CLASSPATH
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java com.jclark.xsl.sax.Driver <i><tt>filename.xml</tt></i> <i><tt>docbook/fo/docbook.xsl</tt></i> > <i><tt>output.fo</tt></i>
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java org.apache.fop.apps.CommandLine <i><tt>output.fo</tt></i> <i><tt>output.pdf</tt></i></pre><p>As of this writing, some other XSLT processors to
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choose from include:</p><div class="itemizedlist"><ul><li><p><a name="c44b1b3b4b9b1"></a>4XSLT, written in Python, from FourThought LLC (
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<a href="http://www.fourthought.com" target="_top">http://www.fourthought.com</a>)</p></li><li><p><a name="c44b1b3b4b9b2"></a>Sablotron, written in C++, from Ginger Alliance (
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<a href="http://www.gingerall.com" target="_top">http://www.gingerall.com</a>)</p></li><li><p><a name="c44b1b3b4b9b3"></a>Saxon, written in Java, from Michael Kay (
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<a href="http://users.iclway.co.uk/mhkay/saxon" target="_top">http://users.iclway.co.uk/mhkay/saxon</a>)</p></li><li><p><a name="c44b1b3b4b9b4"></a>Xalan, written in Java, from the Apache XML
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Project (
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<a href="http://xml.apache.org" target="_top">http://xml.apache.org</a>)</p></li><li><p><a name="c44b1b3b4b9b5"></a>XML::XSLT,written in Perl, from Geert Josten and
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Egon Willighagen (
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<a href="http://www.cpan.org" target="_top">http://www.cpan.org</a>)</p></li></ul></div><p>For print output, these additional tools are available for processing formatting objects:</p><div class="itemizedlist"><ul><li><p><a name="c44b1b3b4c11b1"></a>XEP (written in Java) from
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RenderX (
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<a href="http://www.renderx.com" target="_top">http://www.renderx.com</a>).</p></li><li><p><a name="c44b1b3b4c11b2"></a>PassiveTeX from Sebastian Rahtz (<a href="http://users.ox.ac.uk/~rahtz/passivetex/" target="_top">http://users.ox.ac.uk/~rahtz/passivetex/</a>).</p></li></ul></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a href="pr01.html">Prev</a> </td><td width="20%" align="center"><a href="index.html">Home</a></td><td width="40%" align="right"> <a href="ch01s02.html">Next</a></td></tr><tr><td width="40%" align="left">Preface </td><td width="20%" align="center"><a href="index.html">Up</a></td><td width="40%" align="right"> A brief introduction to XSL</td></tr></table></div></body></html> |