Hi Thomas,
Let's say that I have an XML document looking like that:
<root>
<A name="a1"><B .../></A>
<A name="a2"><B .../></A>
<A name="a3"><B .../></A>
<C aRef="ns1:a1"/>
<C aRef="ns2:a2"/>
</root>
I want to be able to select all the B element which are under
the A elements
referenced by the C element (the A elements for which a
C/@aRef attribute
value, minus the prefix, is equal to the A/@name attribute).
I'd bundle up all the @aRef attributes space separated into a global
variable, and then use a predicate to only select those A elements whose
name attribute is contained in the variable string.
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
version="1.0">
<xsl:variable name="allCs">
<xsl:text> </xsl:text>
<xsl:for-each select="/root/C">
<xsl:value-of select="concat(substring-after(@aRef,':'),' ')"/>
</xsl:for-each>
</xsl:variable>
<xsl:template match="A[contains($allCs,concat(' ',@name,' '))]">
<xsl:copy-of select="B"/>
</xsl:template>
</xsl:stylesheet>
This uses string-handling, so there's probably a faster way, particularly if
your file is large.
Cheers,
Stuart
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list