XPath expressions with a SAX parser
jns at gellyfish.com
Tue Mar 13 09:20:46 GMT 2007
On Tue, 2007-03-13 at 10:04 +0100, Luis Motta Campos wrote:
> On Mar 13, 2007, at 9:22 AM, Nik Clayton wrote:
> > Morning all,
> > Is it possible to use XML::XPath (or similar) with a SAX parser?
> > I'm trying to do is retrieve a (small) subset of elements from an
> > XML document (that may be very large). XML::XPath works when the
> > document is small, but fails to scale when the document is very
> > large (even if the subset of elements I'm trying to retrieve is a
> > fairly constant size).
> > I'd like to keep using the XPath syntax (because it's nice and
> > compact), rather than write my own SAX event handler (because that
> > will be more code).
> > Poking around CPAN doesn't show anything useful, although it's
> > possible I've missed something given the huge number of XML::*
> > modules available.
> Have you looked at http://search.cpan.org/~mirod/XML-DOM-
> XPath-0.13/XPath.pm ?
I think that will probably suffer from the same problem as it will need
to parse the entire document and build a tree in memory (or rather
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