XSLT 1.0 in-browser Q&A

• How to get XSLT path from within XSLT?

<xsl:value-of select="substring-before(substring-after(/processing-instruction('xml-stylesheet'),'href=&quot;'),'&quot;')"/>

XML: <?xml-stylesheet type="text/xsl" href="../AsTable.xsl" ?>

Gives: ../AsTable.xsl

• How to get relative URL of  specific XSLT from XML?

<xsl:value-of select="substring-before(substring-after(/processing-instruction('xml-stylesheet'),'href=&quot;'),'AsTable.xsl&quot;')"/>

Gives: ../

• How to get Javascript URL relative to XSLT applied to XML as processing instruction?

XSLT:

<xsl:param name="baseUrl" select="substring-before(substring-after(/processing-instruction('xml-stylesheet'),'href=&quot;'),'AsTable.xsl&quot;')"  />

<script type="module" src="{$baseUrl}XmlView.js">/**/</script> 

Gives: ../XmlView.js

• list of unique children tags (each last)

*[ not( name() = name(following-sibling::*) ) ]

• how to output XSL from XSL

Add namespace with altered URL, namespace-alias, use the namespace in output:

<xsl:stylesheet version="1.0"
                xmlns="http://www.w3.org/1999/xhtml"
                xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                xmlns:xvxsl="http://www.w3.org/1999/XSL/TransformAlias">
<!--
* get entries for table presentation and
* fills in xsl:template mode="DisplayAs" for each
-->
    <xsl:output method="xml" />
    <xsl:namespace-alias stylesheet-prefix="xvxsl" result-prefix="xsl"/>
...
<xvxsl:template mode="DisplayAs" match="{$xPath}">

• how to debug XSL? 

Currently the most convenient way is given by Visual Studio Pro edition. Trial available.