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Re: Push and Pull?

• To: xml-dev@l...
• Subject: Re: Push and Pull?
• From: "Clark C . Evans" <cce@c...>
• Date: Fri, 25 Jan 2002 21:13:23 -0500
• In-reply-to: <3C51F8B5.1F4C205@p...>; from paul@p... on Fri, Jan 25, 2002 at 04:30:45PM -0800
• References: <003401c1a610$8eb63d40$0cebd018@ilyatbjnaicm5x> <3C51F8B5.1F4C205@p...>
• User-agent: Mutt/1.2.5i

On Fri, Jan 25, 2002 at 06:24:16PM -0800, Sterin, Ilya wrote:
> The thing that I guess is confusing, is that DOM processors are 
> in a way neither push nor pull, but are rather

If "pull" is a flow-control requirement such that the program 
stack is controlled by the data consumer (the program has the
while loop), then DOM is "pull".   Likewise, if "push" is a 
flow-control requirement such that the program stack is 
controlled by the data provider (the parser has the while 
loop), then SAX is "push".  

The "slurping" noise is caused by DOM's random access requirement.
It has nothing to do with the flow-control aspect of the model.

On Fri, Jan 25, 2002 at 04:30:45PM -0800, Paul Prescod wrote:
| Here's the exception that proves the rule:
| http://www.prescod.net/python/pulldom.html

From what I understand, Paul's (quite wonderful) Pull DOM is
a not-quite-compliant DOM where you can't go backwards.  Thus,
it has a pull-interface (the program has the while loop) but
only requires sequential-access.  This works since a restricted
version of DOM is being used.

Best,

Clark

-- 
Clark C. Evans                   Axista, Inc.
http://www.axista.com            800.926.5525
XCOLLA Collaborative Project Management Software

• Follow-Ups:
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    • From: "Sterin, Ilya" <Isterin@c...>

• References:
  • RE: Push and Pull?
    • From: "Sterin, Ilya" <Isterin@c...>
  • Re: Push and Pull?
    • From: Paul Prescod <paul@p...>

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