[xsl] Populating keys with values from other documents

Subject: [xsl] Populating keys with values from other documents
From: "Ashton, Andrew" <andrew_ashton@xxxxxxxxx>
Date: Tue, 29 Jun 2010 14:31:00 -0400
I am trying to look up a value in an XML document (people.xml) based
on a @ref attribute in my primary document (source.xml).  I know that
the @ref values in source.xml will match the @xml:id values in
people.xml.  I can do something like this:

<xsl:template match="name">
        <xsl:variable name="uriRef">
            <xsl:value-of select="(ancestor::*[@xml:id]/@xml:id)[last()]"/>
        <xsl:variable name="person"
        <xsl:if test="$person/residence/country">
        <span about="ont:place#{$uriRef}" property="foaf:based_near" >
            <xsl:value-of select="$person/residence/country"/>

But this is incredibly slow for large documents.  I have experimented
with using xsl:key, but I haven't had much.  Essentially I would like
to pre-populate the key with the values from people.xml, but I can't
quite figure out how to do that in a way that doesn't get me into a
looping scenario and/or that allows me to pass my $uriRef value to the
template that processes the key.  Can anyone explain a better

Thanks, Andy

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