Michael and Wendell,
Thank you both for your replies. Your answer gave me the understanding I needed
to solve this. I added a prefixed namespace declaration to my stylesheet and
prefixed all my xpath expressions with that like Wendell said, now my
stylesheet is working.
Thanks again.
Josh
----------------------------------------
Date: Mon, 9 Feb 2009 18:31:19 -0500
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
From: wapiez(_at_)mulberrytech(_dot_)com
Subject: Re: [xsl] XPath Expression in XSL Template Will Not Return Documen t
Element with Attributesþ
Joshua,
Welcome to XSL-List.
At 05:03 PM 2/9/2009, you wrote:
Listmembers, I have a problem creating an appropriate XPath
expression in a XSL file, and have been unable to find a solution.
Here the Scenario: I have an xml file output from asp.net
xmlserializer class. It outputs the Document Element "Catalog" with
three attributes pertaining to XML namespaces.
the catalog tag looks like this (markup removed):
Catalog
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";
First off, a point of terminology. In namespace-aware XML, attributes
that start "xmlns" aren't attributes in the normal sense, and don't
appear as such in the data model. They are namespace declarations,
which affect the way elements are named (specifically, by allowing us
to differentiate families of elements and attributes with prefixes on
their names).
Second, while you say you have three attributes, you've only pasted
in two. The third might be the source of the problem.
In particular, if you have a (pseudo-)attribute named "xmlns", this
is a namespace declaration for the "null" or unprefixed namespace --
which has the effect of placing unprefixed elements, such as
"Catalog", into this namespace.
The tricky thing is that when this is the case, XSLT has no way of
addressing the element, since you ordinarily do not want to bind
unprefixed names in XSLT to a namespace. (If you do, it's going to
affect elements in your *result* XML, without helping to address the
elements in your *source* XML, since XSLT addresses the source data
via XPath, which is to say, only as attribute values in the XSLT-as-XML.)
The solution is therefore to declare a namespace with a prefix in
your stylesheet, and use that to address the elements.
So if your source data has:
Catalog xmlns="http://my.namespace.com";
your stylesheet would have a declaration
xmlns:n="http://my.namespace.com"; (probably at the very top, on the
xsl:stylesheet element; use any prefix you like, 'n' is my choice),
and thence you would say
... xsl:apply-templates select="n:Catalog" ...
and your stylesheet would then work with your (namespaced) input.
I hope that helps.
Cheers,
Wendell
I have created an XSL file to restructure the information for use in
a ASP.NET GridView Control.
xsl:template match="/"
xsl:apply-templates select="Catalog"
xsl:template>
It works, but only if I remove the attributes from the Element. I
need to know how to format the xsl:template match="Catalog" xpath
expression in the XSL file to match that tag, even if it has attributes.
======================================================================
Wendell Piez mailto:wapiez(_at_)mulberrytech(_dot_)com
Mulberry Technologies, Inc. http://www.mulberrytech.com
17 West Jefferson Street Direct Phone: 301/315-9635
Suite 207 Phone: 301/315-9631
Rockville, MD 20850 Fax: 301/315-8285
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Mulberry Technologies: A Consultancy Specializing in SGML and XML
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