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Re: Third release of Constraint SVG browser

From: Robin Berjon <robin.berjon@expway.fr>
Date: Fri, 27 Feb 2004 00:31:52 +0100
Message-ID: <403E81E8.9070508@expway.fr>
To: Cameron McCormack <cam-www-svg@aka.mcc.id.au>
Cc: www-svg@w3.org

Cameron McCormack wrote:
> Robin Berjon:
>>So do I! I would very much like to see it implemented on top of SVG 1.2 
>>instead of just Batik. Cameron should clamour for extension functions in 
>>the XPath API :-D
> Yeah, that would be cool (the extension functions, if there were an
> interface to XPath from the DOM).  Maybe it would be best to wait for
> XSLT/XPath 2.0 for this, since you can define your own XPath functions
> in XSLT 2.0.  These specs are in final call now, I think.

Requiring XSLT 2.0 support seems very unlikely for SVG 1.2... it's a 
massive spec :) But given that SVG 1.2 has DOM 3 XPath, and that most 
XPath implementations have pluggable extensions (or at the very least a 
table of functions), the addition of something exposing those along the 
lines of:

    interface SVGXPathEvaluator : xpath::XPathEvaluator {
        void    registerFunction( in DOMString NamespaceURI,
                                  in DOMString FunctionName,
                                  in EventListener function );

A listener taking an XPathResultList and returning an XPathResult would 
cut it. Wouldn't you then have all you need to implement CSVG on top of 
SVG 1.2?

Robin Berjon
Received on Thursday, 26 February 2004 18:31:53 UTC

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