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Re: XML parsing memory overhead concerns

• From: James Clark <jjc@j...>
• To: "Clark C. Evans" <clark.evans@m...>
• Date: Fri, 17 Dec 1999 14:48:06 +0700

"Clark C. Evans" wrote:

> Anyway, given a SAX event source, pushing
> the entire document his way, I don't see
> how a single threaded solution is possible.
> 
> And, from the expat declaration of setElementHandler,
> which requires both a StartElementHandler and an
> EndElementHandler, I assumed that expat works in
> a similar (if not identical) manner.

Expat doesn't work like SAX.  Clark Cooper has written a nice article
explaining expat's API:

  http://www.xml.com/pub/1999/09/expat/index.html

With SAX, the application calls parse once per document; the parser
makes a call on an InputStream to get each chunk of input.  With expat,
the parser doesn't make any calls to get input; rather the application
calls XML_Parse() arbitrarily many times for a single document, each
time passing it another chunk of the input.

James


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