On Tue, Mar 1, 2022 at 3:37 AM Nick Wellnhofer <wellnho...@aevum.de> wrote:
> On 28/02/2022 22:07, George Joseph wrote: > > Actually "//*[name()='dm:device']" works as well so maybe that's what > I'll do. > > This seems like the best work-around. > Yeah makes sense. I'll need to do some performance testing regardless of which way I go since I'm parsing SIP messages in real time. > > Is there any reason why path parameters with namespaces haven't been > > supported? > > Would a pull request to add the namespaces > in xsltNewTransformContext be > > considered? > > How parameters are passed isn't covered by the standard, so it's up to the > implementation to come up with something. It seems natural to allow XPath > expressions, but it's not clear how to handle namespaces. Simply taking > the > namespace defitinions from the root element of the root stylesheet should > do > what most people expect, but it is somewhat fragile. > > True. > 1. Passing parameters from the command line > > Supporting namespaces in a clean way would probably require a separate > channel > to register namespaces just for parameter evaluation. Even Saxon doesn't > seem > to support custom namespaces in parameter expressions: > > "The static context for this XPath expression includes only the standard > namespaces conventionally bound to the prefixes xs, fn, xsi, and saxon." > [1] > > 2. Passing parameters using the API > > The most flexible approach is probably an API to set parameters directly, > similar to Saxon's XsltTransformer [2]. This would even allow to pass > nodes > from external documents as parameters. But if you want to combine that > with > XPath expressions, you'd have to evaluate them yourself. > > Nick > > Gotcha. Thanks for all your help Nick! > > [1] > https://www.saxonica.com/documentation11/index.html#!using-xsl/commandline > [2] > > https://www.saxonica.com/documentation11/index.html#!javadoc/net.sf.saxon.s9api/XsltTransformer@setParameter >
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