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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 12:31:37 -0500
• In-reply-to: <005801c175e9$81e98880$0500a8c0@carnage>; from kpako@y... on Sun, Nov 25, 2001 at 11:43:49AM -0800
• References: <15977008ABB8D5118B1300805FA7A8F1815A99@c...> <005801c175e9$81e98880$0500a8c0@carnage>
• User-agent: Mutt/1.2.5i

On Sun, Nov 25, 2001 at 11:43:49AM -0800, Dare Obasanjo wrote:
| No. The pull model has *nothing* to do with an in-memory 
| representation of the document.

Yes.  Random vs. sequential access is an othogonal issue.


         Sequential      Random
       +----------------------------------------------------------
       |
  Push | SAX             (recursive visitor)
       |
  Pull | Pull Parser     DOM
       |
       +-------------------------------------------------------

The confusion arises since SAX and DOM are different
in two regards: (a) processing model (push vs pull)
and (b) access model (random vs sequential).  

The XML Pull Parser is an example which is SAX-like 
in that it is sequential access, but DOM-like in that
it has a pull interface.   The other permutation
is a recurisive visitor interface.  You can scan
the SML-DEV archives if you'd like more information
on this... it doesn't seem to be as useful as the
other three permutations.

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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• References:
  • RE: Push and Pull?
    • From: "Sterin, Ilya" <Isterin@c...>
  • Re: Push and Pull?
    • From: "Dare Obasanjo" <kpako@y...>

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