However if I suggest that, Mike is bound to say that saxon
can spot if an
RTF variable is always used as a string and so optimises away its
internal node structure. so doing this explictly makes no difference.
I'm getting close to that, but not quite there yet. I do some special-casing
of constructs like
<xsl:variable name="x">fred</xsl:variable>
or
<xsl:variable name="x"><xsl:value-of select="'fred'"/></xsl:variable>
but it's still a lot more expensive than
<xsl:variable name="x" select="'fred'"/>
Michael Kay
http://www.saxonica.com/
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