Prashanth Ellina wrote:


> When I try to run the following xsl on an xml with "<dummy></dummy>",
> the 4xslt processor says "Undefined function: "testfn"". Any ideas?
> 
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>                 xmlns:exslt = "http://exslt.org/common"
>                 xmlns:func = "http://exslt.org/functions"
>                 version="1.0">
> 
> <xsl:template match="/">
>      <xsl:value-of select="testfn()"/>
> </xsl:template>
> 
> <func:function name="testfn">
>      <func:result>
>      <hello></hello>
>      </func:result>
> </func:function>
> 
> </xsl:stylesheet>

I don't use 4xslt but Saxon 6 also has support for the EXSLT functions, 
here is a stylesheet that I think achieves what you want to do:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                 xmlns:func="http://exslt.org/functions"
                 xmlns:myfunctions="http://example.com/2005/08/functions"
                 extension-element-prefixes="func"
                 version="1.0">

<xsl:template match="/">
   <results>
      <xsl:copy-of select="myfunctions:testfn()"/>
   </results>
</xsl:template>

<func:function name="myfunctions:testfn">
      <func:result>
      <hello></hello>
      </func:result>
</func:function>

</xsl:stylesheet>

The result of that stylesheet run against any source document is

<?xml version="1.0" encoding="utf-8"?>
<results 
xmlns:myfunctions="http://example.com/2005/08/functions"><hello/></results>

So you need to make sure that you
   - define your own functions in a namespace
   - have extension-element-prefixes="func" on the <xsl:stylesheet>
   - be aware that an EXSLT function defined with func:function like the
     testfn returns a nodeset, if you want to have a nodeset show up in
     the result tree you need to use xsl:copy-of on the result of the
     function call


-- 

	Martin Honnen
	http://JavaScript.FAQTs.com/