Xalan, as far as I know, has always permitted variable references in match
patterns, despite the fact that the spec says it's an error; and after this
length of time (especially as it's permitted in XSLT 2.0) I would think it's
unlikely that they will change this.
I would categorize this as a "known non-conformance" rather than a bug, in
the sense that they almost certainly made a conscious decision to deviate
from the spec here.
Michael Kay
-----Original Message-----
From: Angel Gavin [mailto:agavin(_at_)gmv(_dot_)es]
Sent: 16 March 2005 13:55
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: RE: [xsl] external var in XSL
David,
Thanks a lot for your valuable feedback. This has been my
first intervention
in the list. Not very successful, I must say. You are right
and I am wrong
(well, at least I was right when I said I am not a guru!)
I've just discovered my answer was not exactly about the
issue you have
pointed out (it works, though).
Nevertheless, the problem is still the same. The following
stylesheet works
in Xalan v1.4.0:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:output method="html" version="1.0"
encoding="UTF-8" indent="yes"/>
<xsl:param name="chapterNumber" select="'chapter3'"/>
<xsl:template match="chapters/chapter[(_at_)name = $chapterNumber]">
<html>
<head>
<title>
<xsl:value-of select="@name"/>
</title>
</head>
<body>
<xsl:value-of select="."/>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
I do not get any error. I do not control what to do with "chapter1 and
chapter2 elements", but it produces the desired effect. In
other words, it
does not complain about including
<xsl:template match="chapters/chapter[(_at_)name = $chapterNumber]">.
I run xalan from XML Spy. The funny thing is that, when using
Altova's XSLT
engine, it gives me an error that is completely in line with
your comment
("Variables and parameters cannot be used in variables"). The
same happens
with MSXML.
Since I am more used to xalan, I guess it is a bit more (much
too?) flexible
with this. Maybe it is a bug actually.
To be honest, I am using xalan v1.4.0, and last release is
1.9. Maybe this
bug (if any) has been fixed yet (I will check it asap).
Nevertheless, the solution in my previous mail seems to make
more sense for
me (and seems to be correct!).
Regards,
Angel
-----Original Message-----
From: David Carlisle [mailto:davidc(_at_)nag(_dot_)co(_dot_)uk]
Sent: 16 March 2005 14:34
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: Re: [xsl] external var in XSL
I've tried an example (using Xalan; see below) and it works.
that is a xalan bug then.
Am I doing something wrong?
yes you can not use variable or param references in match patterns.
David
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