RE: [Question] How to do incremental parsing?

[Ajay K sanghi <sanghi@giasdl01.vsnl.net.in>]

Hi:

We currently incrementally read XML document using MSXML SAX parser. You'll
have to use Suspend() and Resume() methods of the IMXReaderControl
interface. However, the MSDN documentation warns "Be aware that this
interface is non-standard"

Hope this helps.

Thanks,

Ajay


-----Original Message-----
From: xml-dev-errors@lists.xml.org
[mailto:xml-dev-errors@lists.xml.org]On Behalf Of Sterin, Ilya
Sent: Wednesday, July 04, 2001 11:02 PM
To: Xu, Mousheng (SEA); xml-dev@lists.xml.org
Subject: RE: [Question] How to do incremental parsing?




> -----Original Message-----
> From: Xu, Mousheng (SEA) [mailto:Mousheng.Xu@sea.celltechgroup.com]
> Sent: Tuesday, July 03, 2001 8:27 PM
> To: 'xml-dev@lists.xml.org'
> Subject: [Question] How to do incremental parsing?
>
>
> Dear all,
>
> A problem of all the current XML parsers is that they at least read the
> whole XML document into the input stream, which can consume a lot
> of memory
> when the XML is big (e.g. 1 GB).

Not true.  Use SAX parser.


>
> One way to get around the problem would be to read the XML file
> into memory
> gradually and when needed. I would like to build such a DOM
> parser, but I am

There is a modules that does the for Perl.  XML::Twig reads in only the
parts of the document which you specify and builds a DOM representation of
it.  So therefore you avoid loading the parts that you will not use.

Ilya



> not familiar with the design of the Xerces XML parsers. Could someone give
> me a suggestion on how to tackle on the problem? The most critical part
> would be the method to parse an element. If reading the whole
> document into
> memory is inevitable, then I would like to borrow the method
> which parse the
> input stream to get the next element.
>
> Your help is highly appreciated.
>
> Thanks in advance.
>
> -- Mousheng Xu
>
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