[xsl] Re: Saxon versus Xalan implementations of evaluate() extension function?

["Andrzej Taramina" <andrzej@xxxxxxxxxxx>]

Adrian suggests:

> I think just doing all evaluations in a variable
> beforehand should give you a bit more safety to work
> in saxon/xalan/both. I was using xalan with the dyn
> EXSLT extension and saxon and it seemed to work...
> Although when I wanted to make it processor
> independant to check beforehand what evaluate to use
> like so... <xsl:apply-templates
> use-when="function-available(dyn:evaluate)"
> select="dyn:evaluate($evalThis)"/>, xalan 1.0
> processor seemed to have a problem with the use-when
> if this is an issue to work in both. I wasnt sure of a
> workaround).

Is dyn:evaluate() availabe in Saxon 8.4? How about Saxon 6.5.4?

> but back to the problem, does this work?...
> <xsl:variable name="evalThis" select="concat(
> '$data/', @xpathValue )" />
> ... saxon:evaluate( $evalThis )
> 
> at worst try this...
> <xsl:variable name="evalThis" select="concat( $data,
> '/', @xpathValue )" />
> ... saxon:evaluate( $evalThis )

Won't work, since many times the variable $data is a node set.  Xalan handles that fine.
saxon:evaluate won't bind to the variable.

I tried reverting to Saxon 6.5.4 but then kept getting the following exception:

javax.xml.transform.TransformerException: Error in expression : Unexpected token EOF in
expression

Anyone know what causes this exception and why Saxon 6.5.4 would throw this when Saxon 8.4
and Xalan don't, on the same stylesheet source?

Thanks!

....Andrzej

Chaeron Corporation
http://www.chaeron.com