You can use a recursive function to change context to each document and then
return the results of each keyed access.
David
-----Original Message-----
From: saxon-help-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@xxxxxxxxxxxxxxxx
[mailto:saxon-help-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@xxxxxxxxxxxxxxxx]On
Behalf Of Willink, Ed
Sent: 12 January 2004 10:39
To: 'saxon-help-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@xxxxxxxxxxxxxxxx'
Subject: RE: [saxon] Chaining of transformations in Saxon?
Hi
> > >
> > > Main disadvantage is that keys cannot be used on subsequent
> > > passes, since keys are defined with respect to the read not
> > > recreate context.
> > >
> > I'm not quite sure what you mean by this comment. Keys can
> be used in
> > any phase of the transformation. You always have to be careful when
> > using the key() function to get the context right (key()
> > finds nodes in
> > the same document as the context node), but apart from
> that, there are
> > no limitations. Certainly you *can* use keys on temporary trees.
>
> Interesting.
Unfortunately, this doesn't always work in practice.
If I want to use @xmi:id as a key, and execute in multiple passes,
then I have a separate root for each pass, one for the input and
one for each variable holding additional intermediates.
Since the @xmi:id may need resolution across more than one 'document' root,
I cannot rely on a key to resolve an @xmi:idref.
[Incidentally, is there an elegant way to intercept the generic node
construction/copy process to auto-create an @xmi:id]
Regards
Ed Willink
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