Subject: RE: [xsl] newbie - parameters with/without values?? From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Mon, 4 Oct 2004 16:56:32 +0100 |
Firstly, a stylsheet parameter always has a value. Let's suppose the default value is "$$$" (the "default default" is ""). Then you can write your query as //item[$param = '$$$' or @field = $param] Michael Kay http://www.saxonica.com/ > -----Original Message----- > From: Hardy Merrill [mailto:HMerrill@xxxxxxxxxxxxxxxx] > Sent: 04 October 2004 16:10 > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > Subject: [xsl] newbie - parameters with/without values?? > > XSLT newbie alert. > > I have an xml document with lots of nodes. I have some fields > (each with its own value) I'd like to use as "search" > criteria - normally I would pass the field values into the XSL > style sheet as parameters, and just reference the parameters. > But the kicker here is that the parameters may *** or may not *** > have values. If a parameter has a value, I want to include it in > an XPath select. If a parameter does NOT have a value, then I > don't want to include that parameter in the XPath select. > > I've been trying to use variables to "build" an XPath expression > from the supplied parameters using "if test"s, but I'm not having > much luck since variables can only be given a value once, and their > scope is limited to the block in which they are declared. > > Given this XML document: > > <my_document> > <person> > <name>Joe</name> > <gender>Male</gender> > <city>Boston</city> > </person> > <person> > <name>Janice</name> > <gender>Female</gender> > <city>Denver</city> > </person> > </my_document> > > can I build an XSL style sheet to take in parameters "gender" and > "city", which may or may not have values, and *build* an XPath > select expression that will find the right nodes? > > I'm sure this is a trivial question, but being a newbie I'm having > trouble with it. > > TIA. > > Hardy Merrill
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