Problem with default namespace declaration and XSLT

[Persson Richard <ri...@tietoenator.com>]

I am trying to do a XSL transformation of a XML file using the class
javax.xml.transform.Transformer and an external XSL file.
The XSL file performs a very simple copy of the entire input to the output.

XSL-File:
----------
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
<xsl:output encoding="ISO-8859-1"/>

<xsl:template match="Message">
	<xsl:copy-of select="."/>
</xsl:template>

</xsl:stylesheet>
-----------


Problem:
--------------
If the input XML looks like (note default namespace declaration has no
namespace prefix 'xmlns=...'):
<?xml version="1.0" encoding="ISO-8859-1"?>
<Message xmlns="http://www.dot.com/xmlstds/request">
	<Type V="H"/>
	<MsgVersion>v1.0 2002-11-08</MsgVersion>
	<MIGversion>v1.0 2002-11-08</MIGversion>
 ...

I get a value-of result from the XSLT.

But, if the input XML has got a namespace declaraion with namespace prefix,
'xmlns:foo="http://www.dot.com/xmlstds/request' I get what I want, a copy-of
result of the input file.

Is the javax.xml.transform.Transformer class failing or am I on the wrong
track?

/Richard Persson



---------------
Richard Persson
TietoEnator AS

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Re: Problem with default namespace declaration and XSLT

[Joseph Kesselman <ke...@us.ibm.com>]

You probably intended this for the Xalan (XSLT processor) user list rather
than the Xerces (XML parser) list.

Short answer: This is an XSLT FAQ. To match a namespaced element -- whether
the source document uses the default namespace or not -- you must use a
properly-declared namespace prefix in your XPath. There is a proposal to
add the default shorthand to XPath 2.0, but until that comes along you're
stuck.  Rewrite your template as

<xsl:template match="foo:Message" xmlns:foo="
http://www.dot.com/xmlstds/request">
             <xsl:copy-of select="."/>
</xsl:template>

(Of course you can declare the prefix at a higher level, eg on the
stylesheet element, if you prefer; since you'll usually want to use it in
multiple templates that's generally the preferred solution.)

______________________________________
Joe Kesselman, IBM Next-Generation Web Technologies: XML, XSL and more.
"The world changed profoundly and unpredictably the day Tim Berners Lee
got bitten by a radioactive spider." -- Rafe Culpin, in r.m.filk


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