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RE: [xsl] namespace generation in the output.

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> Then I found this in the docbook stylesheets :-)
> 
> 
> <xsl:element name="xsl:stylesheet">
>   <xsl:variable name="a">
>       <xsl:element name="dummy"
> namespace="http://www.w3.org/1999/xhtml"/>
>   </xsl:variable>
>     <xsl:copy>
>       <xsl:copy-of select="exsl:node-set($a)//namespace::*"/>
>       <xsl:copy-of select="@*"/>
>       <xsl:apply-templates/>
>    </xsl:copy>
> </xsl:template>
> 
> 
> which simply copies over the namespace from the variable just 
> declared,
> which means that the stylesheet produced puts all literal content into
> the xhtml namespace.

No, it doesn't put elements into the XHTML namespace: it causes the XHTML
namespace to be declared in the output even if it is never used.

As DC mentioned this trick is usually needed only when the required
namespace is not known until run-time. In other cases you can use a literal
result element and all its in-scope namespaces will be copied with it. This
example is unusual because it's using xsl:element rather than an LRE. This
is because you can't generate an xsl:stylesheet element using an LRE unless
you go through all the complexities of xsl:namespace-alias, which this
developer was wise to avoid.

Michael Kay
http://www.saxonica.com/

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