Re: namespaces and extensions and multiple files

Hi, 

> I want my XSL file to handle all the variants of the "multiple output
> file" scenario; to avoid a load of namespace declarations at the
> front, I thought I'd be clever and use the "xmlns" attribute on the
> extension element itself, thusly:
> 
>  <xsl:when test="contains($processor,'Clark')">
>   <document xmlns="http://www.jclark.com/xt" href="{$filename}">
>    <xsl:call-template name="writestone"/>
>   </document>
>  </xsl:when>
> 
>  <xsl:when test="contains($processor,'SAXON')">
>   <output xmlns="http://icl.com/saxon" file="{$filename}">
>    <xsl:call-template name="writestone"/>
>   </output>
>  </xsl:when>
> 
>  <xsl:when test="contains($processor,'Apache')">
>   <write xmlns="org.apache.xalan.xslt.extensions.Redirect" file="{$filename}">
>    <xsl:call-template name="writestone"/>
>   </write>
>  </xsl:when>
> 
>  <xsl:when test="contains($processor,'Oracle')">
>   <output use="oout"  xmlns="http://www.oracle.com/XSL/Transform/java" 
href="{$filename}">
>    <xsl:call-template name="writestone"/>
>   </output>
> 
> XT accepts this, and does what I expect. The other three don't. Would
> anyone care to express a view on whether this *should* work?

In 14.1 of http://www.w3.org/TR/xslt#extension-element
it is stated
"When such an extension element is instantiated, then the XSLT processor 
must perform fallback for the element as specified in [15 Fallback]. An 
XSLT processor must not signal an error merely because a template contains 
an extension element for which no implementation is available."

Hmm ...

OTOH in 15 it reads
"However, when an XSLT processor performs fallback for an instruction 
element, if the instruction element has one or more xsl:fallback children, 
then the content of each of the xsl:fallback children must be instantiated 
in sequence; otherwise, an error must be signaled."

If this means that you *must* provide an xsl:fallback element, you should
add <xsl:fallback/> in each of your extension elements and see what happens.

Cheers,
Oliver


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|  ob|do        Dipl.Inf. Oliver Becker                             |
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