W3C home > Mailing lists > Public > public-ws-addressing@w3.org > January 2006

RE: proposed breaking change to echo global element declaration

From: <paul.downey@bt.com>
Date: Tue, 3 Jan 2006 17:46:23 -0000
Message-ID: <2A7793353757DB4392DF4DFBBC9522550276F19D@I2KM11-UKBR.domain1.systemhost.net>
To: <distobj@acm.org>, <public-ws-addressing-tests@w3.org>, <public-ws-addressing@w3.org>

Hi Mark,

> Whatever the resolution, I hope that the need for additional
> out-of-band agreement (other than what is defined in the SOAP & WSDL
> specs) is documented as an interoperability problem.

I'm unsure what OOB agreement is needed - the issue is that the
same element 'echo' being used for the input and output, an 
endpoint acting as both the sender and receiver roles can only use 
Action to distinguish if the echo is a request or a response. 

In practice, an endpoint is unlikely be operating as both 'client'
and 'server', 'publisher' and 'subscriber' etc. so changing the 
message body element to be also unique relaxes the requirement
artificially placed upon implementations to process based upon 
wsa:Action rather than the message contents or even some 
combination of the two.

As far as the sender is concerned, they only need to populate
the wsa:Action and body fields as directed by the WSDL, EPR or
whatever and all is well.

Received on Tuesday, 3 January 2006 17:46:35 UTC

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