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Re: [xsl] Elements and functions available

Subject: Re: [xsl] Elements and functions available
From: "Andrew Welch" <andrew.j.welch@xxxxxxxxx>
Date: Wed, 22 Oct 2008 10:27:35 +0100

Out of interest, can someone comment on the cost of calling these
functions?  I imagine element-available() is very cheap, but I'm
wondering about function-available() with user created extensions...

Given a transform that makes use of many custom extensions, is it
reasonable to do:

   <xsl:when test="function-available( )">
     normal execution
     test execution

...to allow you to run the transform away from the host application?
Or would all the calls to function-available() adversely affect normal
running of the transform?

The alternative (and good practice anway I think) is to move all of
the calls to extensions into one or maybe two physical stylesheets,
and then you can use an alternative primary stylesheet that imports a
different stylesheet where the calls to the extensions have been
replaced with sample values....

Either way, I'm just wondering if I should try to avoid lots of
function-available() calls?

2008/10/22 Jesper Tverskov <jesper@xxxxxxxxxxx>:
> I have tested the little used XSLT functions element-available() and
> function-available() and made a stylesheet that can create a report
> for most XSLT processors, testing also for EXSLT extensions and Saxon
> extensions.
> I have made 8 reports available and a summary, "Elements and functions
> available in XSLT processors",
> http://www.xmlplease.com/elements-functions.
> Feel free to suggest improvements.
> Best regards,
> Jesper Tverskov
> http://www.xmlplease.com

Andrew Welch
Kernow: http://kernowforsaxon.sf.net/

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