Re: [xsl] Using saxon:assign and testing content of variable

Subject: Re: [xsl] Using saxon:assign and testing content of variable
From: David Carlisle <davidc@xxxxxxxxx>
Date: Tue, 20 Sep 2005 22:43:35 +0100
> First what is the proper way to reset the variable to be empty and 
> hopefully no nodes in the node-set? Does a simple <saxon:assign 
> name="pageNumber"/> do it?

ther's no "proper" way to reset a variable in a functional
language saxon:assign really cuts across the whole declarative language
paradigm and really once you use something like that you aren't really
using XSLT at all.

However I don't understand your comment

> What I'm at a loss for is the proper test in the <choice> to see if there 
> is content in $pageNumber.

You don't need to test this you know exactly the content of the variable
                               <fo:leader leader-pattern="dots" 
leader-length="1in" />
ref-id="{generate-id()}" />

so it is a result tree fragment corresponding to those elements.

I can't really tell from the small fragment that you posted but I
suspect that you are trying to get XSLT to process page numbers and
other values calculated by an FO engine. That never works,the XSLT
process does not know _anything_ about XSLFO and XSLFO does not know
_anything_ about XSLT. As far as the xslt is concerned there is nothing
special about  <fo:page-number-citation>  it could just as well be
<jhgifgi> it's just an element node in a result tree. XSLT has to
construct the entire FO document to be processed and teh XSLT
transformation finishes before the FO engine starts.


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