Evaluation of a string containing a valid XPath Patter

Hi,

I was wondering if it is possible to retrieve a node set by evaluating a
global stylesheet parameter
which contains a valid XPath Expression.

Example

<xsl:stylesheet ...>
<xsl:param name="$gXPath"/>

<xsl:template match="/">
    <xsl:value-of select="$gXPath"/>
</xsl:template>
</xsl:stylesheet>

The result would be the string value of $gXPath, but I would need the node
set referred to by $gXPath,
something like eval-xpath-expr($gXPath) or else would be great, any ideas? I
already came to the point
writing something parser-like, parsing the expression contained by $gXPath
and setting up variables to
retrieve the nodes in question, but this is too much overhead, since a lot
of nodes have to be processed
every time the stylesheet is invoked.

Is there a short hand way to do this? I don't want to / cannot use the
transformNode method of the Microsoft
XMLDOM, since I do need the whole xml document.

Thanks

Carsten Klein


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