Issue i044: Definition of the rules to reply to a message in Core 3.2

Based on the discussion on yesterday's call, the proposal I made for
issue i044[4] needs to be expressed in terms of message addressing
properties.

The previous version's last step was wrongly talking about SOAP
headers. As Marc pointed out, we do not need to talk about SOAP
serialization in the core, as the part about reference parameters is
covered in [3]:

* Hugo Haas <hugo@w3.org> [2005-01-16 19:27-0500]
> -=- Proposal -=-
> 
> Spell out rules for replying to a message, which I believe to be:
> - select reply endpoint, fault, or source EPR, depending on the type
>  of message being replied and the information found in the first
>  message
> - use the EPR's [address] property as the [destination] MAP
> - use the [message id] MAP as the [relationthip] URI with the right
>  relationship type
> - echo the EPR's [referance properties] and [reference parameters] as
>  SOAP headers

Here's a revised proposal for the rules of a reply message. It is more
detailed. The proposed text is for section 3.2:

----8<--

The reply to an incoming message using WS-Addressing is constructed as
follows.

1. Select the appropriate EPR

If the reply is a normal message and the incoming message's [reply
endpoint] message addressing property is not empty, select the EPR
from this property.

Otherwise, if the reply is a fault message and the incoming message's
[fault endpoint] message addressing property is not empty, select the
EPR from this property.

Otherwise, if incoming message's [source endpoint] message addressing
property is not empty, select the EPR from this property.

Otherwise, select an EPR whose [address] property is the anonymous
endpoint URI, http://www.w3.org/@@@@/@@/addressing/role/anonymous.

2. Populate the reply message's message addressing properties

The following message addressing properties are populated as follows:
- [destination]: this property takes the value of the selected EPR's
  [address] property
- [relationship]: a new pair of URIs is added to this value; the
  selected EPR's [message id] property value is used as the related
  message; the appropriate relationship type is associated with it
- [reference parameters]: this property takes the value of the
  selected EPR's [reference parameters] property

-->8----

Note that, in order to do that cleanly, I have used a [reference
parameters] message addressing property which currently does not
exist; introducing one is something which also has benefits in the
context of issue i021, as per [1] and [2]. This is a proposed change
for section 3.

Cheers,

Hugo

  1. http://lists.w3.org/Archives/Public/public-ws-addressing/2004Nov/0529.html
  2. http://lists.w3.org/Archives/Public/public-ws-addressing/2004Dec/0067.html
  3. http://dev.w3.org/cvsweb/~checkout~/2004/ws/addressing/ws-addr-soap.html#_Toc77464317
  4. http://www.w3.org/2002/ws/addr/wd-issues/#i044
-- 
Hugo Haas - W3C
mailto:hugo@w3.org - http://www.w3.org/People/Hugo/