Re: Howto implement a node index extension to be shared across transform invocations on the same source document (DOMSource)

Christoffer Dam Bruun schrieb:
> Michael Ludwig skrev:
>> Could XSLTC (which I don't have any experience with yet) be used to
>> make the <xsl:key> persist? Hmm, maybe the <xsl:key> would persist -
>> but that probably would still require its execution on a document
>> instance.
> I don't think XSLTC would make any difference since the XSLT processor
> cannot know that the XML document has not been modified since the key
> was last calculated- only I as the programmer knows that.

I see, you'd need the lookup table resulting from applyint the <xsl:key>
on the document, and that doesn't seem to be available.

>> Could you use the ID feature built into XML to achieve what you want?
> I have looked at it - the problem is that I also use an one-to-many
> reverse-id lookup e.g.:
> "All elements that refer to the element with this @id"
> and I don't think I can cram that into the builtin ID feature.

Can't think of a way to achieve that either. Sounds like you really need
<xsl:key>.

I've never used this, but if all else fails, you might want to take a
look at VTD-XML:

http://vtd-xml.sourceforge.net/

Michael Ludwig