RE: WS-A Issue 28 - Multiple ports needed in an EPR

I take issue with the assertion "where there are different
protocols/transports/formats available for the same service, the "access
to a Web service endpoint" requires the client to choose among
alternatives". 
 
If I, the service, give you, the client, a single EPR then as far as you
are concerned, there is only one mechansim with which you can
communicate with me. So you don't need to make any choices ( except
whether to communicate or not, I guess ). 
 
If I am available on multiple EPRs, then I'll provide you with multiple
EPRs (perhaps in a WSDL document), *then* you have to choose one from
the set.
 
Gudge
 
________________________________

From: public-ws-addressing-request@w3.org
[mailto:public-ws-addressing-request@w3.org] On Behalf Of Bergersen,
Rebecca
Sent: 04 November 2004 11:53
To: public-ws-addressing@w3.org
Cc: Newcomer, Eric; Vinoski, Stephen; Bergersen, Rebecca
Subject: WS-A Issue 28 - Multiple ports needed in an EPR



	Issue 28 - Multiple ports needed in an EPR
	 
	According to the ws-addressing submission, "Endpoint references
convey the information needed to identify/reference a Web service
endpoint, and may be used in several different ways: endpoint references
are suitable for conveying the information needed to access a Web
service endpoint...."  However, in the situation where there are
different protocols/transports/formats available for the same service,
the "access to a Web service endpoint" requires the client to choose
among alternatives, each accessible in the standard manner through a
port - but there are different ports for each protocol/transport/format
alternative.  When such alternatives exist, the EPR must be able to
identify those multiple ports.
	 
	
	Rebecca Bergersen
	Principal Architect, Middleware Standards
	rebecca.bergersen@iona.com <mailto:rebecca.bergersen@iona.com> 
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