[xsl] Complicated Variable/Xpath update

[Andrew Borsz <andrew@xxxxxxxxxxxxxxx>]

Hello again,
I've found a solution for my problem but it is not very efficient (it 
goes to show you can think about something for days but only find a 
solution until you ask someone...). Is there anything less time 
consuming than this? It really bogs down my computer.

<xsl:template match="anchor">
<xsl:variable name="anchor"><xsl:value-of select="@id"/></xsl:variable>
<xsl:variable name="source">
<xsl:value-of select="//linkSource[@href = 
$anchor]/following-sibling::linkTarget/@href"/>
</xsl:variable>
<xref pointer="{$source}"></xref>
</xsl:template>

Thanks for all your help.

-Andrew