Re: XPath 2.0: Conditional Expression (Was Re: XQuery
I'd second Jeni's request on this front, though I might also see keeping in mind the node-set aspect. If you have a conditional statement of the form if(myNodeSet=condition,exprA,exprB) then the function will return a node-set containing either exprA or exprB depending upon whether the given node in the node-set satisfies or fails to satisfy the condition. Thus, if you have a node-set of the form <record name="Kurt"/> <record name="Jeni"/> <record name="Jim"/> called $records and myFunc returns a node of the form <invalidRecord name="myName"/> if($records[@name="Jeni"], . , myFunc(//crossRef[@idref=./@name])) would return a node-set of the form <invalidRecord name="Kurt"/> <record name="Jeni"/> <invalidRecord name="Jim"/> Of course, if no second condition is imposed, this just becomes a handy way to apply a function to a bunch of nodes one a a time, since function($nyNodeSet) would act on the node-set while if($myNodeSet,function(.)) would act on each node of the node-set. The ability to convert a string to an XPath expression would be nice. It sort of exists with the common node-set() extension in XSLT, but that to me seems to be something that should be intrinsic to the functional set. -- Kurt ----- Original Message ----- From: "Jeni Tennison" <mail@xxxxxxxxxxxxxxxx> To: "Jim Melton" <jim.melton@xxxxxxx> Cc: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx> Sent: Friday, September 07, 2001 9:46 AM Subject: XPath 2.0: Conditional Expression (Was Re: XQuery 1.0 and XPath 2.0 Functions and Operators Version 1.0) > Hi Jim, > > Another XPath 2.0 requirement that doesn't seem to be present in the > F&O WD is 2.2 "Must Provide a Conditional Expression". I imagined that > conditional expressions would be supported with an operator, something > like: > > boolean-expression ? true-expression : false-expression > > Is this functionality going to appear in a different document? > > Cheers, > > Jeni > > --- > Jeni Tennison > http://www.jenitennison.com/ > > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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