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<html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="UTF-8"><meta name="copyright" content="(C) Copyright 2020"><meta name="generator" content="DITA-OT"><meta name="description" content="DITA Open Toolkit provides a series of extension points that can be used to integrate changes into the core code. Extension points are defined in the plugin.xml file for each plug-in. When plug-ins are installed, DITA-OT makes each extension visible to the rest of the toolkit."><meta name="keywords" content="extension points, overview, plug-in, preprocessing, plugin.xml, topicmerge, org.dita.pdf2.xsl.topicmerge"><link rel="stylesheet" type="text/css" href="../css/commonltr.css"><link rel="stylesheet" type="text/css" href="../css/dita-ot-doc.css"><title>Extension point reference</title></head><body id="plugin-extension-points"><header role="banner"><div class="header">
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<p>DITA Open Toolkit</p>
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<hr>
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</div></header><nav role="toc"><ul><li><a href="../index.html">DITA Open Toolkit 3.6</a></li><li><a href="../release-notes/index.html">Release Notes</a></li><li><a href="../topics/installing-client.html">Installing DITA-OT</a></li><li><a href="../topics/building-output.html">Building output</a></li><li><a href="../topics/input-formats.html">Authoring formats</a></li><li><a href="../topics/output-formats.html">Output formats</a></li><li><a href="../parameters/index.html">Parameters</a></li><li><a href="../topics/html-customization.html">Customizing HTML</a></li><li><a href="../topics/pdf-customization.html">Customizing PDF</a></li><li><a href="../topics/adding-plugins.html">Adding plug-ins</a></li><li><a href="../topics/custom-plugins.html">Creating plug-ins</a></li><li><a href="../topics/troubleshooting-overview.html">Troubleshooting</a></li><li><a href="../reference/index.html">Reference</a><ul><li><a href="../reference/architecture.html">DITA-OT architecture</a></li><li><a href="../reference/dita-spec-support.html">DITA specification support</a></li><li class="active"><a href="../extension-points/plugin-extension-points.html">Extension points</a><ul><li><a href="../extension-points/all-extension-points.html">All extension points</a></li><li><a href="../extension-points/plugin-extension-points-general.html">General extension points</a></li><li><a href="../extension-points/plugin-extension-points-pre-processing.html">Pre-processing extension points</a></li><li><a href="../extension-points/plugin-extension-points-xslt-import.html">XSLT-import extension points</a></li><li><a href="../extension-points/plugin-extension-points-xslt-parameters.html">XSLT-parameter extension points</a></li><li><a href="../extension-points/plugin-extension-points-support.html">Version and support information</a></li><li><a href="../extension-points/extension-points-by-plugin.html">Plug-in extension points</a></li></ul></li><li><a href="../reference/license.html">License</a></li><li><a href="../reference/glossary.html#glossary">Glossary</a></li></ul></li><li><a href="../topics/dita-and-dita-ot-resources.html">Resources</a></li></ul></nav><main role="main"><article role="article" aria-labelledby="ariaid-title1">
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<h1 class="title topictitle1" id="ariaid-title1">Extension point reference</h1>
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<p class="shortdesc">DITA Open Toolkit provides a series of extension points that can be used to integrate changes into the core
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code. Extension points are defined in the <span class="ph filepath">plugin.xml</span> file for each plug-in. When plug-ins are
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installed, DITA-OT makes each extension visible to the rest of the toolkit.</p>
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<nav role="navigation" class="related-links"><ul class="ullinks"><li class="link ulchildlink"><strong><a href="../extension-points/all-extension-points.html">All DITA-OT extension points</a></strong><br>The pre-defined extension points can be used to add new functionality to DITA-OT. If your toolkit installation includes custom plug-ins that define additional extension points, you can add to this list by rebuilding the DITA-OT documentation.</li><li class="link ulchildlink"><strong><a href="../extension-points/plugin-extension-points-general.html">General extension points</a></strong><br>These extension points enable you to extend DITA-OT. You can add Ant targets or imports; add a Java library to the <span class="keyword parmname">classpath</span> parameter; add a new transformation type; extend a catalog file; add new diagnostic messages, and more.</li><li class="link ulchildlink"><strong><a href="../extension-points/plugin-extension-points-pre-processing.html">Pre-processing extension points</a></strong><br>You can use these extension points to run an Ant target before or after the pre-processing stage. If necessary, you can also run an Ant target before a specific pre-processing step — but this approach is not recommended.</li><li class="link ulchildlink"><strong><a href="../extension-points/plugin-extension-points-xslt-import.html">XSLT-import extension points</a></strong><br>You can use these extension points to override XSLT processing steps in pre-processing and certain transformation types. The value of the <code class="keyword markupname xmlatt">@file</code> attribute in the <code class="keyword markupname xmlelement"><feature></code> element specifies a relative path to an XSL file in the current plug-in. The plug-in installer adds a XSL import statement to the default DITA-OT code, so that the XSL override becomes part of the normal build.</li><li class="link ulchildlink"><strong><a href="../extension-points/plugin-extension-points-xslt-parameters.html">XSLT-parameter extension points</a></strong><br>You can use these extension points to pass parameters into existing XSLT steps in both the pre-processing pipeline and DITA-OT transformation. The parameters generally will be available as global <code class="keyword markupname xmlelement"><xsl:param></code> values with XSLT overrides.</li><li class="link ulchildlink"><strong><a href="../extension-points/plugin-extension-points-support.html">Version and support information</a></strong><br>You can use these extension points to define version and support information for a plug-in. Currently, DITA-OT does not do anything with this information, but it might do so in the future.</li><li class="link ulchildlink"><strong><a href="../extension-points/extension-points-by-plugin.html">Extension points by plug-in</a></strong><br>The default plug-ins that ship with DITA Open Toolkit include a series of extension points that can be used to modify various aspects of toolkit processing.</li></ul><div class="familylinks"><div class="parentlink"><strong>Parent topic:</strong> <a class="link" href="../reference/index.html" title="The Reference topics provide more advanced information about the DITA-OT architecture, OASIS specification support, and licensing.">Reference</a></div></div><div class="linklist relinfo"><strong>Related information</strong><br><ul class="linklist"><li class="linklist"><a class="link" href="https://www.oxygenxml.com/events/2014/dita-ot_day.html#Extending_the_DITA_Open_Toolkit" target="_blank" rel="external noopener" title="DITA-OT includes extension points that let you do any number of things. This session will cover what's available, what you should or shouldn't extend, and give out sample plugins to slice and dice your content.">Extending the DITA Open Toolkit: How crazy can you get?</a></li></ul></div></nav></article></main></body></html> |