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why is select=".[true()]" bad?


Why is it that a predicate is not allowed when I do something like

<xsl:variable name="foo" select=".[@id=1]"/>

I mean if the current node has an 'id' attribute numerically equal to the
number 1, then $foo will be the current node; otherwise it will be an
empty node-set, right? Both SAXON and XT gripe at me for having a
predicate after . at all. I can't even say ".[true()]"! What's the deal?
I don't see anything in XPath prohibiting this.

   - Mike
____________________________________________________________________
Mike J. Brown, software engineer at         My XML/XSL resources:
webb.net in Denver, Colorado, USA           http://www.skew.org/xml/


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