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" />
<fo:basic-link
internal-destination="{generate-id()}">
<fo:page-number-citation
ref-id="{generate-id()}" />
</fo:basic-link>
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.
David
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