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Re: Select value by position

Subject: Re: Select value by position
From: David Carlisle <davidc@xxxxxxxxx>
Date: Tue, 29 Aug 2006 11:38:22 +0100
Re:  Select value by position
> Thanks for any tips how to improve performance..

> <xsl:variable name="identifier">
>    <xsl:value-of select="normalize-space(dc:identifier)"/>
> </xsl:variable>

Never use an xsl:variable with content like this unless you really need
to generate a new result tree fragment 9which is essentially a new node
tree with a root node (/) a text node with string value. that's
expensive to build and has to be coersed back to a string when used. You
just want a string here so

 <xsl:variable name="identifier">

which is less code to type and a lot more efficient (athough in this
case you don't really need a variable at all). In xslt1 that will use
the first dc:identifier, in xslt2 it will generate an error that there
is more than one. Tou sie the second you can use

 <xsl:variable name="identifier">

or [last()] or whatever predicate you need to specify.

	<xsl:attribute name="rdf:about"><xsl:value-of 

could be written more simply as
  <rdf:Description rdf:about="{$identifier}">
or just inline the variable if it is only used once:

  <rdf:Description rdf:about="{normalize-space(dc:identifier[2]}">


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