Processing topics with XSLT in preprocess

You can add an Ant target to the end of the pre-processing pipeline that transforms all topics. This is useful if you want to modify topics before transtype-specific processing, for example to modularize the code or reuse the same processing in multiple transformation types.

1. Create a plug-in descriptor file plugin.xml that imports a new Ant buildfile build.xml and adds an Ant target after pre-processing.

   <?xml version="1.0" encoding="utf-8"?> <?xml-model href="https://www.dita-ot.org/rng/plugin.rnc" type="application/relax-ng-compact-syntax"?> <plugin id="plugin-id"> <feature extension="ant.import" file="build.xml"/> <feature extension="depend.preprocess.post" value="uniform-decimals"/> </plugin>

2. Create an Ant buildfile build.xml with a target to process all DITA topics in the temporary directory.

   <?xml version="1.0" encoding="utf-8"?> <project> <target name="uniform-decimals"> <pipeline taskname="xslt"> <xslt basedir="${dita.temp.dir}" style="${dita.plugin.plugin-id.dir}/filter.xsl"> <ditafileset format="dita" processingRole="normal"/> </xslt> </pipeline> </target> </project>

3. Create an XSLT stylesheet filter.xsl to filter topic content.

   <?xml version="1.0" encoding="utf-8"?> <xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema" exclude-result-prefixes="xs"> <!-- Format keywords with a decimal number with at least two decimal points --> <xsl:template match="*[contains(@class, ' topic/keyword ')]"> <xsl:copy> <xsl:apply-templates select="@*"/> <xsl:variable name="num" select="number(.)" as="xs:double"/> <xsl:choose> <xsl:when test="$num = $num and contains(., '.')"> <xsl:attribute name="orig" select="."/> <xsl:value-of select="format-number($num, '0.00#')"/> </xsl:when> <xsl:otherwise> <xsl:apply-templates select="node()"/> </xsl:otherwise> </xsl:choose> </xsl:copy> </xsl:template> <!-- Identity template --> <xsl:template match="@* | node()"> <xsl:copy> <xsl:apply-templates select="@* | node()"/> </xsl:copy> </xsl:template> </xsl:stylesheet>

4. Use the dita install subcommand to install the plug-in.

   Note: For more information, see Installing plug-ins.

The filter.xsl stylesheet will transform every DITA topic after preprocessing.