dear forum users,

i hope someone can help me with the following problem:

i want to apply an XSLT transformation on an XSD document. my problem is now that the "xsl:apply-templates" element does not return any matching node unless i define the xpath expression as an xsl:variable.

concretely lets look at this example XSD:

<xsd:schema xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.gbxml.org/schema" targetNamespace="http://www.foo.org/schema" elementFormDefault="unqualified" attributeFormDefault="unqualified" version="0.37">
<xsd:annotation>
<xsd:documentation>documentation of a problem</xsd:documentation>
</xsd:annotation>
</xsd:schema>

if i want a rule to give me the value of for example the "targetNamespace" value i could write a template rule in my XSLT stylesheet:

<xsl:template match="xsd:schema" mode="class">
<xsl:value-of select="./@targetNamespace"/>
</xsl:template>

and call this template rule in the global rule:

<xsl:template match="/">
<xsl:apply-templates select="xsd:schema" mode="class"/>
</xsl:template>

however THIS does not work!the matching rule does not return nothing.

i do not understand.. maybe it has a problem with the xsd: namespace (i also declared it in my XSLT stylesheet, of course) but i just figured out that the following soultion by interposing a xsl:variable works:

<xsl:template match="/">
<xsl:variable name="xpath" select="xsd:schema"/>
<xsl:apply-templates select="$xpath" mode="class"/>
</xsl:template>

can someone PLEASE tell me why it shows me this behaviour, and maybe how to omit the usage of an intermediary xsl:variable element.

thank you very much,

best regards,

mario

Creating a stylesheet out of the bits of XSLT you have posted the above works fine for me (it outputs "http://www.foo.org/schema").

Perhaps if you show us a complete sample XSLT which doesn't work we can try and identify the problem.

What XSLT processor are you using? Perhaps that is an issue?

The following running in Saxon 9 Basic using Kernow for Saxon:

__________________
/- Sam Judson : Wrox Technical Editor -/

Think before you post: What have you tried?

many thanks for your fast reply.

with your help i figured out what was the problem:

i define a namespace attribute for the target file which is the same namespace attribute as the one i am querying. therefore this attribute is overruling and hiding the original attribute.

concretely:

<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
>

<xsl:template match="/">
<rdf:RDF xmlns="http://www.xxx.com/test#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#">

<xsl:apply-templates select="xsd:schema" mode="class"/>

</rdf:RDF>

</xsl:template>

</xsl:stylesheet>

therefore no node called "schema" was found within the "xsd" namespace defined in the "rdf" tag.

thanks a lot for your help,

best regards,

mario

There is nothing to stop you using a different prefix you know. Simply define the one in your stylesheet to be xmlns:myxsd="http://www.w3.org/2001/XMLSchema" and the reference it as select="myxsd:schema".

I find it highly suspicious though that you are redefining the XMLSchema namespace with a # at the end - This isn't the correct namespace for the XML Schema - and yes, that # would cause other applications to fail..

Also, you haven't defined the rdf prefix anywhere.

__________________
/- Sam Judson : Wrox Technical Editor -/

Think before you post: What have you tried?

hello,

yes it is strange, but i want the output document to be a valid "RDF" file. therefore i first created an ontology in Protege and then having a look at the .owl file revealed:

<rdf:RDF xmlns="http://www.sample.com/sample#"
xml:base="http://www.sample.com/sample/sample.owl"
xmlns:BuildingOntology="http://www.sample.com/sample/sample.owl#"
xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
xmlns:owl2xml="http://www.w3.org/2006/12/owl2-xml#"
xmlns:owl="http://www.w3.org/2002/07/owl#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<owl:Ontology rdf:about=""/>

That's the reason why i redefine the namespace with an # at the end, so that it looks this way in the end ;) .

thanks,

mario