I would like to rename a processing instruction, and at the same time add a unique id attribute to it. My input looks like this:
?xml version="1.0" encoding="utf-8" ?>
<material xml:lang="en-us">
<title>
<?PI_start author="joepublic" comment="Comment #1" ?>Discovering
<?PI_end?>XML
</title>
<related-stuff>
<?PI_start author="johndoe" comment="Comment #3" ?>
<a href="otherdoc.xml" />
<?PI_end?>
</related-stuff>
</material>
The result would look like this:
<?xml version="1.0" encoding="utf-8"?>
<material xml:lang="en-us">
<title>
<?otherPI_start author="joepublic" comment="Comment #1" id ="1" ?>Discovering
<?otherPI_end id ="1" ?>XML
</title>
<related-stuff>
<?otherPI_start author="johndoe" comment="Comment #3" id ="2" ?>
<a href="otherdoc.xml" />
<?otherPI_end id ="2"?>
</related-stuff>
</material>
Notice that I have two id's generated, id="1" for the first instruction encountered in the document, id="2" for the second. Also notice that the id is repeated in the otherPI_end processing instruction.
Can you help me identify the matching statement in the xsl that would do this?
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output method="xml" indent="yes" />
<xsl:template match="node()|@*">
<xsl:copy>
<xsl:apply-templates select="node()|@*" />
</xsl:copy>
</xsl:template>
<xsl:template match="processing-instruction('PI_start')">
<xsl:processing-instruction name="otherPI_start">
author="<xsl:value-of select="substring-before(substring-after(.,'author="'),'"')"/>"
comment="<xsl:value-of select="substring-before(substring-after(.,'comment="'),'"')"/>"
id="<!-- What should I put here??? -->"
</xsl:processing-instruction>
</xsl:template>
<xsl:template match="processing-instruction('PI_end')">
<xsl:processing-instruction name="otherPI_end">
id="<!-- What should I put there??? -->"
</xsl:processing-instruction>
</xsl:template>
</xsl:stylesheet>
id="<!-- What should I put here??? -->"
<xsl:value-of select="generate-id()"/>
If you want the id of <?PI_end?>
to match that of the preceding <?PI_start ?>
, then use:
<xsl:value-of select="generate-id(preceding-sibling::processing-instruction('PI_start')[1])"/>
XSLT 1.0
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>
<!-- identity transform -->
<xsl:template match="@*|node()">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="processing-instruction('PI_start')">
<xsl:processing-instruction name="otherPI_start">
<xsl:value-of select="."/>
<xsl:text>id="</xsl:text>
<xsl:value-of select="generate-id()"/>
<xsl:text>"</xsl:text>
</xsl:processing-instruction>
</xsl:template>
<xsl:template match="processing-instruction('PI_end')">
<xsl:processing-instruction name="otherPI_end">
<xsl:text>id="</xsl:text>
<xsl:value-of select="generate-id(preceding-sibling::processing-instruction('PI_start')[1])"/>
<xsl:text>"</xsl:text>
</xsl:processing-instruction>
</xsl:template>
</xsl:stylesheet>