RE: XPath with SAX?

There has been research work (sorry, I can't point to it specifically)
on defining a subset of XPath that can be executed in streaming mode,
and/or translating XPath expressions into such a subset. A very limited
such subset is used for defining identity constraints in XML Schema. In
general, though, given the reverse axes and arbitrary predicates, the
problem is either impossible or very difficult, and mainstream products
don't attempt it.

Michael Kay

> -----Original Message-----
> From: www-xpath-comments-request@w3.org 
> [mailto:www-xpath-comments-request@w3.org] On Behalf Of Simon Kampa
> Sent: 22 January 2004 14:00
> To: www-xpath-comments@w3.org
> Subject: XPath with SAX?
> 
> 
> 
> Hi,
> 
> Most XPath implementations appear to use some DOM Parser as 
> the base to perform XPath resolution. However, is there an 
> approach that uses a SAX parser to find the correct location 
> as specified in the XPath and then return the corresponding 
> nodeset. (Yes, I realise this sounds like mixing a bit of SAX 
> with a bit of DOM.)
> 
> My problem is having to apply XPath expressions to VERY large 
> documents where DOM parsing is hugely resource intensive.
> 
> Ideas/Thoughts greatly appreciated.
> 
> Thanks.
> 
> --
> Simon Kampa
> 
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Received on Thursday, 22 January 2004 12:13:35 UTC