Subject: Re: [xsl] string parameter to node-set? From: David Carlisle <davidc@xxxxxxxxx> Date: Fri, 3 Jan 2003 17:09:40 GMT |
> I suppose this is because the parameter is of type string, and the > select attribute requires a node set. How do I solve this? this is a FAQ. Some systems (saxon, and xalan for example) have an evaluate extension that allows a string to be evaluated as an X{ath expression, however there are more poratble alternatives. In simple cases you can pass in a string used to make up the expression, so instead of para-xpath=/root/data[@id='whatever' ... <xsl:apply-templates select="$para-xpath"/> para-id=whatever <xsl:apply-templates select="/root/data[@id=$para-id]"/> Otherwise if you are calling XSLT from some API rather than the command line it is usually possible to make the parameter have a value being the node set itself rather than an Xpath taht selects the node set. Typically you use some Xpath interface to a DOM to select teh node set and then pass that in as the parameter, then your <xsl:apply-templates select="$para-xpath"/> would work. > The key problem is that I need to transform a subset of a larger XML > stream, where the subset is defined through an XPath expression and all > this must happen within XSL in order to avoid cross-domain security > constrains in JavaScript. hmm so the last possibility may not be avaolable to you. > Any recommendations welcome. You could ask the XSLT WG to reconsider adding evaluate to xpath 2.... Or you can have a two pass approach, take the xpath expression from teh source and generate a stylesheet that uses that expression, then run teh generated stylesheet. David ________________________________________________________________________ This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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