[xsl] dynamic-context type-branching

[ac <ac@xxxxxxxxxxxxx>]

Hi,

In schema unaware xslt2 environments, what would be the best way to 
select action depending on the result type (ex: string, text node(s), 
attribute(s), element(s)) of saxon:evaluate(), ex:

idealy (v1) something like ...
   <xsl:template match="context" mode="foo">
       <xsl:param name="xpathstring" select="... some xpath string ... "/>
       <xsl:apply-templates 
select="saxon:eval(saxon:evaluate($xpathstring)" mode="lama"/>
   </xsl:template>

but since you cannot apply-templates on atomic types, alternately (v2) ...
   <xsl:template match="context" mode="foo">
       <xsl:param name="xpathstring" select="... some xpath string ... "/>
       <xsl:variable name="tmp" 
select="saxon:eval(saxon:evaluate($xpathstring)"/>
       <xsl:choose>
           <xsl:when test="$tmp instance of 
xs:anyAtomicType"><xsl:value-of select="$tmp"/></xsl:when>
           <xsl:otherwise><xsl:apply-templates select="$tmp" 
mode="lama"/></xsl:otherwise>
       </xsl:choose>
   </xsl:template>

Assuming mode="lama" has templates with appropriate matches for the 
different types.

Thanks,
ac