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[xsl] Forcing a namespace declaration

2007-05-01 06:37:31
Hi all,

The following XML:

<?xml version="1.0" encoding="UTF-8"?>
<n xmlns="http://www.test.com"; xmlns:xhtml="http://www.w3.org/1999/xhtml"/>

uses the following XSLT:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0" xmlns="http://purl.org/rss/1.0/"; xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"; xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; xmlns:dc="http://purl.org/dc/elements/1.1/"; xmlns:rss1="http://purl.org/rss/1.0/"; exclude-result-prefixes="rss1" xpath-default-namespace="http://www.test.com";>

        <xsl:output indent="yes" method="xml"/>

        <xsl:template match="n" >
<rdf:RDF xmlns="http://purl.org/rss/1.0/"; xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"; >
                        <channel>fffffff</channel>
                </rdf:RDF>
        </xsl:template>

</xsl:stylesheet>

to generate the following XML:

<?xml version="1.0" encoding="UTF-8"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";
        xmlns:dc="http://purl.org/dc/elements/1.1/";>
  <channel xmlns="http://purl.org/rss/1.0/";>fffffff</channel>
</rdf:RDF>

I'm using XSLT 2 in Saxon 8.

The problem is I need the http://purl.org/rss/1.0/ xmlns declaration to appear on the root element instead of on the channel element.

I believe it is appearing where it is due to the xmlns:rss1="http://purl.org/rss/1.0/"; declaration, as when I remove this it works in the way I want it to. The xmlns:rss1="http://purl.org/rss/1.0/"; declaration is needed on the root element as elsewhere in the stylesheet I need to process an external document with elements belonging to this namespace.

The only way I can see to fix this is to have xpath-default-namespace attributes scattered at appropriate points in the stylesheet. As the templates do not separate easily into sections determined by which XML document they are working on i believe this will lead to code that is difficult to read.

Can anyone explain why http://purl.org/rss/1.0/ is being declared on channel instead of the root element?

Can anyone propose a better solution to this problem than the one I have come up with?

Thanks

Tom

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