Re: [xsl] Setting Namespace on Generated xsl:stylesheet Element

["G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>]

At 2010-01-25 10:11 -0600, Roger L. Cauvin wrote:
> I'm using a stylesheet (A.xsl) to generate another stylesheet (B.xsl).
> B.xsl will process Atom feeds and thus needs to reference the atom
> namespace.  Consequently, B.xsl needs a namespace declaration in the
> xsl:stylesheet element:
>
> <xsl:stylesheet version="1.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>                               xmlns:atom="http://www.w3.org/2005/Atom";>
>
> To generate the xsl:stylesheet element in B.xsl, I have the following
> excerpt in A.xsl:
>
> <xsl:element name="xsl:stylesheet">
>   <xsl:namespace name="atom">http://www.w3.org/2005/Atom</xsl:namespace>
>   <xsl:attribute name="version">1.0</xsl:attribute>
>   ...
> </xsl:element>

You don't need to be that elaborate, just use namespace alias:

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xslo="dummy">

<xsl:namespace-alias stylesheet-prefix="xslo" result-prefix="xsl"/>

<xsl:template ....
  <xslo:stylesheet version="1.0"
                   xmlns:atom="http://www.w3.org/2005/Atom";>
  .....
  </xslo:stylesheet>
</xsl:template>

This uses a non-XSLT namespace in the template rule but the XSLT 
namespace in the result tree.

> My understanding is that the xsl:namespace element in this excerpt is only
> valid in XSLT 2.0.  I tried:
>
> <xsl:attribute name="xmlns:atom">http://www.w3.org/2005/Atom</xsl:attribute>
>
> but Saxon told me:
>
> Error at xsl:attribute on line 22 column 40 of QueryToFeedFilter.xsl:
>   XTDE0850: Invalid attribute name: {xmlns:atom}
> Failed to compile stylesheet. 1 error detected.

Correct ... because xmlns is reserved for namespaces, you cannot 
create a non-namespace node (i.e. an attribute node) with it.

> Using XSLT 1.0, is there a way of generating the xsl:stylesheet element that
> needs to be in B.xsl?

That is the use case for namespace aliasing.

I hope this helps.

. . . . . . . . . . Ken

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