Re: [xsl] removing a specific namespace declaration

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

At 2009-11-07 16:42 -0800, tom a wrote:
> I'm trying to remove what I believe to be an unused namespace 
> declaration from the output.

Unused namespace declarations are supposed to be benign to processing 
applications.  Why is it you want to remove it?

> eg:
>
> Source:
> <?xml version="1.0" encoding="ISO-8859-1"?>
> <svg  viewBox="0 0 360 792" xmlns="http://www.w3.org/2000/svg"; 
> xmlns:xlink="http://www.w3.org/1999/xlink"; xmlns:foo="http://www.foo.com";>
> <!-- svg content -->
> </svg>
>
> Becomes:
> <?xml version="1.0" encoding="ISO-8859-1"?>
> <svg  viewBox="0 0 360 792" xmlns="http://www.w3.org/2000/svg";
> xmlns:xlink="http://www.w3.org/1999/xlink";>
> <!-- svg content -->
> </svg>
>
> ie, the foo namespace is removed in the transformation.
>
> I've seen many posts on removing all namespaces, but can't figure 
> out how to remove a specific namespace.

In XSLT one neither removes all namespaces nor removes specific namespaces.

In XSLT and in XQuery one is always creating result trees from 
scratch using the information found in source trees.

To achieve what you want you need to reconstitute the elements and 
inhibit the copying of the foo namespace, rather than copying the 
elements, because copying an element has the effect of copying all 
attached namespace nodes.

I hope the example below helps.

. . . . . . . . . Ken

T:\ftemp>type toma.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<svg  viewBox="0 0 360 792" xmlns="http://www.w3.org/2000/svg"; 
xmlns:xlink="http
://www.w3.org/1999/xlink" xmlns:foo="http://www.foo.com";>
<!-- svg content -->
</svg>

T:\ftemp>call xslt toma.xml toma.xsl
<?xml version="1.0" encoding="utf-8"?><svg 
xmlns="http://www.w3.org/2000/svg"; xm
lns:xlink="http://www.w3.org/1999/xlink"; viewBox="0 0 360 792">
<!-- svg content -->
</svg>
T:\ftemp>type toma.xsl
<?xml version="1.0" encoding="US-ASCII"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
                version="1.0">

<xsl:template match="*">
  <xsl:element name="{name(.)}" namespace="{namespace-uri(.)}">
    <xsl:copy-of select="namespace::*[name(.)!='foo']"/>
    <xsl:copy-of select="@*"/>
    <xsl:apply-templates/>
  </xsl:element>
</xsl:template>

<xsl:template match="comment()|processing-instruction()|text()">
  <xsl:copy/>
</xsl:template>

</xsl:stylesheet>
T:\ftemp>

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