I am attempting to transform an XML document with an included stylesheet in multiple passes, however whenever I attempt to include exsl:node-set to make the variable I have placed the transformed XML into usable Firefox fails parsing with the notice Error loading stylesheet: An unknown error has occurred ().
I have not found any other technique to do multiple transformation passes in XSLT 1.0, and I am led to believe Firefox does not support XSLT 2.0 and should support exsl:node-set.
My code is the following:
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xml" href="#stylesheet"?>
<doc>
<xsl:stylesheet id="stylesheet" version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="xsl:stylesheet" mode="passone"/>
<xsl:template match="@*|node()" mode="passone">
<xsl:copy>
<xsl:copy-of select="ancestor::node()[local-name()='inherit']/@*"/> <!-- take default from parent -->
<xsl:copy-of select="@*"/> <!-- overwrite if applicable -->
<xsl:apply-templates mode="passone"/>
</xsl:copy>
</xsl:template>
<xsl:template match="@*|node()" mode="passtwo">
<xsl:copy>
<xsl:copy-of select="ancestor::node()[local-name()='inherit']/@*"/> <!-- take default from parent -->
<xsl:copy-of select="@*"/> <!-- overwrite if applicable -->
<xsl:apply-templates mode="passtwo"/>
</xsl:copy>
</xsl:template>
<xsl:template match="@*|node()" mode="passthree">
<xsl:copy>
<xsl:copy-of select="ancestor::node()[local-name()='inherit']/@*"/> <!-- take default from parent -->
<xsl:copy-of select="@*"/> <!-- overwrite if applicable -->
<xsl:apply-templates mode="passthree"/>
</xsl:copy>
</xsl:template>
<xsl:template match="*[local-name()='inherit']" mode="passthree">
<xsl:apply-templates mode="passthree"/>
</xsl:template>
<xsl:template match="*[local-name()='template'][@define]" mode="passtwo"/>
<xsl:template match="*[local-name()='template'][@insert]" mode="passtwo">
<xsl:copy-of select="//*[local-name()='template'][@define=current()/@insert]/*"/>
<xsl:apply-templates mode="passtwo"/>
</xsl:template>
<xsl:template match="/">
<xsl:variable name="resultone">
<xsl:apply-templates mode="passone" select="."/>
</xsl:variable>
<xsl:variable name="resulttwo">
<xsl:apply-templates mode="passtwo" select="exsl:node-set($resultone)"/>
</xsl:variable>
<xsl:apply-templates mode="passthree" select="exsl:node-set($resulttwo)"/>
</xsl:template>
</xsl:stylesheet>
<svg version="1.1" viewBox="0 0 26 14" xmlns="http://www.w3.org/2000/svg">
<template define="row">
<rect/>
<rect x="4"/>
<rect x="8"/>
<rect x="12"/>
<rect x="16"/>
<rect x="20"/>
<rect x="24"/>
</template>
<inherit width="2" height="2">
<template insert="row"/>
<inherit y="4">
<template insert="row"/>
</inherit>
<inherit y="8">
<template insert="row"/>
</inherit>
<inherit y="12">
<template insert="row"/>
</inherit>
</inherit>
</svg>
</doc>
And the expected result is:
<?xml version="1.0" encoding="UTF-8"?>
<svg version="1.1" viewBox="0 0 26 14" xmlns="http://www.w3.org/2000/svg">
<rect width="2" height="2"/>
<rect x="4" width="2" height="2"/>
<rect x="8" width="2" height="2"/>
<rect x="12" width="2" height="2"/>
<rect x="16" width="2" height="2"/>
<rect x="20" width="2" height="2"/>
<rect x="24" width="2" height="2"/>
<rect x="24" y="4" width="2" height="2"/>
<rect x="20" y="4" width="2" height="2"/>
<rect x="16" y="4" width="2" height="2"/>
<rect x="12" y="4" width="2" height="2"/>
<rect x="8" y="4" width="2" height="2"/>
<rect x="4" y="4" width="2" height="2"/>
<rect y="4" width="2" height="2"/>
<rect y="8" width="2" height="2"/>
<rect x="4" y="8" width="2" height="2"/>
<rect x="8" y="8" width="2" height="2"/>
<rect x="12" y="8" width="2" height="2"/>
<rect x="16" y="8" width="2" height="2"/>
<rect x="20" y="8" width="2" height="2"/>
<rect x="24" y="8" width="2" height="2"/>
<rect x="24" y="12" width="2" height="2"/>
<rect x="20" y="12" width="2" height="2"/>
<rect x="16" y="12" width="2" height="2"/>
<rect x="12" y="12" width="2" height="2"/>
<rect x="8" y="12" width="2" height="2"/>
<rect x="4" y="12" width="2" height="2"/>
<rect y="12" width="2" height="2"/>
</svg>
exsl:node-set describes the function node-set in the namespace with the prefix exsl. Like any other, this prefix and namespace is not available by default, but has to be declared.
Specifically node-set exists in the Common module of EXSLT, whose namespace is http://exslt.org/common.
This means you will have to add xmlns:exsl="http://exslt.org/common" to the xsl:stylesheet element, which will make this namespace available under the exsl prefix and enable you to use the desired function as exsl:node-set.
Apart from that, using modes to apply only specific templates, piping the result into a variable and using it as input to apply-templates as demonstrated in the given source is the correct way.
Thanks to Martin Honnen for the pointer.