Re: use-when in the xsl:inlcude

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Subject: Re: use-when in the xsl:inlcude
From: "G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>
Date: Sat, 30 Aug 2008 07:39:39 -0400

At 2008-08-30 12:49 +0300, Vladimir Nesterovsky wrote:

Is there something I can pass to xslt for it to evaluate that something in the use-when attribute in the xsl:inlcude, and xsl:import? In particular I'm using saxon in java.
I think I have found a clean way to achieve the desired effect. I'll define an uri resolver that among others will resolve uri like "configuration:data".

Thus I can write:

<xsl:include href="..." use-when="document('configuration:data')/data/xs:boolean(@xxx)"/>

I guess, this approach has a virtue to be almost processor independent.

Except that it won't work. Your use-when= above relies on *some* document context in order to determine the argument values for the document() function, but as I mentioned earlier all use-when= processing *must* happen before any input source tree is loaded. After all, there may be some top-level instructions in the imported stylesheet tree that impact on the source node tree.

So, in summary, the document() function cannot be used because it is *not* independent of the source node tree ... it needs to be executed in *some* source node tree context and there is no source node tree when the processor acts on use-when=.

I'm quite confident your proposed approach will not work ... you say you found it, but have you tried it?

I hope this helps.

. . . . . . . . . . . . . Ken

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Current Thread

Re: use-when in the xsl:inlcude, (continued)
- G. Ken Holman - 28 Aug 2008 14:53:06 -0000
- Andrew Welch - 28 Aug 2008 15:02:10 -0000
- Michael Kay - 28 Aug 2008 15:15:15 -0000
- Vladimir Nesterovsky - 30 Aug 2008 09:49:20 -0000
  - G. Ken Holman - 30 Aug 2008 11:40:28 -0000 <=
    - Vladimir Nesterovsky - 30 Aug 2008 12:58:20 -0000
    - G. Ken Holman - 30 Aug 2008 13:24:15 -0000
    - Vladimir Nesterovsky - 30 Aug 2008 15:09:18 -0000
    - Michael Kay - 31 Aug 2008 09:35:29 -0000

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