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Issue 154 closed: Invariance of role

From: Gaertner, Dietmar <Dietmar.Gaertner@softwareag.com>
Date: Thu, 7 Mar 2002 14:32:47 +0100
Message-ID: <DFF2AC9E3583D511A21F0008C7E621060163BEC2@daemsg02.software-ag.de>
To: "'xmlp-comments@w3.org'" <xmlp-comments@w3.org>
Cc: "'dug@us.ibm.com'" <dug@us.ibm.com>
Hi all,

the XMLP WG has decided to close the issue 154, invariance of role [1],
with the resolution proposed in [2] as follows:

Section 2.6 of SOAP Version 1.2 Part 1 now states:

  "This section sets out the rules by which SOAP messages are processed. 
  Unless otherwise stated, processing must be semantically equivalent to 
  performing the following steps separately, and in the order given. Note 
  however that nothing in this specification should be taken to prevent 
  the use of optimistic concurrency, roll back, or other techniques that 
  might provide increased flexibility in processing order as long as all 
  SOAP messages, SOAP faults and application-level side effects are 
  equivalent to those that would be obtained by direct implementation of 
  the following rules in the order shown below.

  1. Determine the set of roles in which the node is to act. The contents 
  of the SOAP envelope, including header blocks and the body, MAY be 
  inspected in making such determination."
  ...

Summarised, this resolution states that a node is explicitly allowed to
inspect the message contents when deciding on the set of roles it is to
play. A node is also allowed to change the set of roles it plays after
starting to process blocks provided that the outcome of this is
"semantically equivalent to performing the following steps separately,
and in the order given".

[1] http://www.w3.org/2000/xp/Group/xmlp-issues.html#x154
[2] http://lists.w3.org/Archives/Public/xml-dist-app/2002Feb/0392.html
Received on Thursday, 7 March 2002 08:33:01 GMT

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