Re: Avoiding boneheaded mistakes in XSLT?
On Wed, Dec 29, 2010 at 02:39:04PM +0000, Dave Pawson scripsit: > On Wed, 29 Dec 2010 13:14:15 +0000 > David Carlisle <davidc@xxxxxxxxx> wrote: > > On 29/12/2010 13:09, Piet van Oostrum wrote: > > > It would be nice if processors would have a debug mode in which > > > XPath expressions would be checked against a schema or DTD and give > > > a warning when some 'impossible' expression is encountered. > > > Impossible meaning something that never can give a non-empty result > > > on valid documents. Probably just paths that are illegal according > > > to the schema. > > > > That's exactly what a schema aware xpath2 processor will do. > > Even without schema awareness/context, surely the processor can > tell when an xpath expression will result in zero match? But a zero match is completely legitimate, isn't it? If I'm matching on para/b, and much of my input doesn't have it, and some of it does, I shouldn't get a warning because I'm looking for something that isn't in this particular input file. Or am I completely mis-understanding what you want, there? -- Graydon
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