Re: [xsl] xpath query in an attribute

[Oleg Tkachenko <olegt at multiconn dot com>]

Balazs Scheidler wrote:

> Hi,
> 
> I'm new to XSL, and I'm not sure whether I did something wrong or xalan (the
> xslt engine I use is buggy).
> 
> So I want to run an XPath query I extracted from an attribute in the XML
> document.
> 
> Here's what I did:
> 
>     <xsl:variable name="query" select="@select"/>
>     <xsl:value-of select="$query"/>
> 
> The first statement extracts the select attribute from the current node, and
> the second _should_ run the query in $query, and return the accompanying
> node-set. The problem is that it doesn't, it displays the value of the query
> itself.
> 
> My question is: how to execute string variables as XPath queries? Any help
> welcome.
First of all variable 'query' will actualy hold result of evaluating XPath 

expression "@select" but not this expression itself. Read more about variables in xslt.

And second - pure XSLT doesn't

support dynamic XPath expression. If you really want to run that stuff 
you should probably to use xalan:evaluate() extension function.


-- 
Oleg Tkachenko
Multiconn International, Israel


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