Re: [xsl] 'apply-templates' on parameter of 'call-template'

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

At 2004-04-09 13:07 -0400, Angus McIntyre wrote:
> Is it legitimate to invoke 'xsl:apply-templates' on a parameter passed to 
> 'xsl:call-template'?

Only if the parameter is of type "node set" since that is the only argument 
type for select= for <xsl:apply-templates/>

> In other words, should the following fragment be expected to work:
>
>         <xsl:template match="/">
>            <xsl:call-template name="test">
>               <xsl:with-param name="body">
>                  <p>This is my body</p>
>                  <matchable id="123"/>
>               </xsl:with-param>

No, because the data type of the parameter is result tree fragment.

>            </xsl:call-template>
>         </xsl:template>
>
>         <xsl:template name="test">
>            <xsl:param name="body">no body</xsl:param>

To initialize a node set to empty use select="/.." as the attribute.

> The Xalan error ("can not convert #RTREEFRAG to a nodelist") hints that 
> I'm trying to do something basically contrary to the spirit of XSL, or at 
> least XSL 1.0.

Good hint!

> What I'd like to do can be described as follows: use 'call-template' to 
> 'surround' an arbitrary block of XML, _contained in the XSL stylesheet_, 
> by additional XML content - and have templates applied to the contained 
> block in the usual way.

Then address the nodes in the stylesheet using the document function.  In 
outline form:

  <xsl:stylesheet
        xmlns:myns="my-namespace"
        exclude-result-prefixes="myns"

  <myns:data1>
         <p>This is my body</p>
         <matchable id="123"/>
  </myns:data1>

  ...
     <xsl:with-param name="body" select="document('')/*/myns:data1/node()"/>

> As to why I want to do this particularly horrible thing, put it down to 
> someone else's questionable design decisions. If the nodes that I want to 
> 'surround' were in the XML rather than the XSL, this would be trivial.

But XSL *is* XML so you can use the document() function to get at the nodes 
of your stylesheet.

I hope this helps.

....................... Ken

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