Subject: [xsl] Executing variable XPath queries in XSLT From: "Joseph Fourness" <josephf@xxxxxxxxxxx> Date: Fri, 22 Jun 2001 08:53:26 -0700 |
Hello, I have a source document that looks like the following: <rule> <expression>%/PageContent/session/userid</expression> <condition>eq</condition> <expression>112314</expression> </rule> As you can see I'm trying to encode rules and logic into an XML file and by using XSLT evaluate these rules. The % symbol denotes an XPath expression that needs to be executed against an XML file. I'm getting this as a variable as follows: <xsl:variable name="xpath-query" select="substring-after(rule/expression[1], '%')"/> And I would like to then execute this query using $xpath-query in a select statement. I would like to do this entirely in XSLT using no extension mechanisms. I'm wondering if there are any tricks, known ways to execute these kinds of expressions. The methods I've explored so far are: 1) Pipelining, using two XSLTs the first one to pre-process the XSLT and convert all %expressions into XPath queries. The second one to execute this new XSLT (with the XPaths already built-in) This works fine, but is quite tricky and I was hoping to do this in one XSLT. 2) Using <msxsl:script> MSXML extension mechanism. Writing some simple JavaScript I instantiate the MSXML parser and use it to process the XPath query and return a result node-set. This solution works and seems to have no problems, but it ties me to MSXML and I would prefer to stay within the realm of standard XSLT (we are precompiling our XSLTs and find that calling extension mechanisms is a small performance hit.) I've searched the FAQs and the resources on the internet, but to no avail. Hopefully there is some cool way to do this. (It should be possible, I think, but I can't think of anything off hand...) Thanks for your help, I greatly appreciate it! Joe Fourness XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
Re: [xsl] Convert to a Nodelist, David Carlisle | Thread | Re: [xsl] Executing variable XPath , Jeni Tennison |
Re: [xsl] XSL : Selecting nodes, Wendell Piez | Date | [xsl] Installing MSXML3 in replace , Elina Bidner |
Month |