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[xsl] Evaluating XML inside attributes (using XSLT 2.0 and Saxon)

2010-03-24 13:39:51
Good day,

This is in relation to my earlier posts, but I have not yet been able
to solve my problem. I have tried working around the problem below,
but because of the type of information I'm working with (labeling and
vector graphics), I can't get past the fact that sometimes I end up
with attributes that will get part of their content from other parts
of the XML document.

Can anyone please share some ideas around evaluating information for
use inside xml attributes. I know it's ugly, horrible and terrible to
escape XML an dump it inside an attribute, but I need to reference
content by id from inside attributes from time to time. I can move
attributes out into child elements, but this can become even more
confusing.

Input:
<root>
  <name lookup-id="5">
    Johny
  </information>
  <chapter title="The life of &lt;x&gt;5&lt;/x&gt;">
     Everyone knew that <x>5</x> was a happy child
  </chapter>
</root>

XSLT
???

Required output:
<root>
  <name lookup-id="5">Johny</information>
  <chapter title="The life of Johny">Everyone knew that Johny was a
happy child</chapter>
</root>

I'm unable to get the XSLT processor to evaluate the content of the
title attribute. Obviously a template matching x does not get called
for content inside attributes.

A generic approach would be ideal. Something that will work no matter
where <x>5</x> is.

Kind regards,
Jacobus

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