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RE: use case [SAX-style XP handlers]

From: Andy Neilson <aneilson@webplan.com>
Date: Wed, 20 Dec 2000 09:03:28 -0500
To: "'Mark A. Jones'" <jones@research.att.com>, <xml-dist-app@w3.org>
Message-ID: <000201c06a8d$a14b1800$d9778bc0@wp1271>
I suspect this use case is fairly common. I have already done several
implementations using this technique. I pointed out in an earlier message
that the SOAP HTTP binding's use of HTTP status codes does not address this
use case.

This use case seems less associated with the sort of use we hear about most
(i.e., RPC-oriented), and more associated more with document-oriented uses.

Andy Neilson

-----Original Message-----
From: xml-dist-app-request@w3.org [mailto:xml-dist-app-request@w3.org]On
Behalf Of Mark A. Jones
Sent: Tuesday, December 19, 2000 15:56
To: xml-dist-app@w3.org
Subject: use case [SAX-style XP handlers]

[I have a series of use cases to add for the working group
consideration.  I am submitting one per message to allow for easier
reference in the mail archives.]

An XP sender generates a lengthy XP message that is incrementally
transmitted and received by an XP receiver.  The XP receiver employs an
XP handler that can incrementally process the body as it is received
(e.g., employing a SAX-style XML parser on the body as it arrives).

Note that the entire message need not be present at one time at any
point in its existence.  This would be particularly helpful for
memory-limited processors.  It is also very efficient for services which
are consistent with incremental, real-time transformations of the data,
direct archiving of received data, etc.

It would also be useful in scenarios in which voluminous body data can
be directly transduced into application data structures or events by an
XP (module) processor.  In particular, there is no need for the explicit
construction of a DOM model of the data.  Support for XP data models
might still be possible even with incremental processing if the models
are incrementally constructible.

Mark A. Jones
AT&T Labs - Research
Shannon Laboratory
Room A201
180 Park Ave.
Florham Park, NJ  07932-0971

email: jones@research.att.com
phone: (973) 360-8326
  fax: (973) 360-8970
Received on Wednesday, 20 December 2000 09:04:25 UTC

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