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RE: EPR to UDDI Mapping

From: Vikas Deolaliker <vikasd@yahoo.com>
Date: Wed, 19 Jan 2005 17:10:37 -0800
To: "'Harris Reynolds'" <hreynolds@webmethods.com>, <public-ws-addressing@w3.org>
Message-ID: <E1CrQqH-0007Gc-Se@frink.w3.org>


Harris,

I see two issues in the scenario you describe. 

First, EPR seems like a dynamic addressing service and so a service
receiving EPR cannot forward it to another (not the original sender) without
triggering some security policy. 

Second, if anything is to be stored it should be the logical address and not
physical as you suggest. The reason being there are multiplicity of physical
addresses depending upon the transport and those addresses can change. 

It might help if you create a category called reference addresses and
distinguish them from logical and physical. EPR being a reference address
that needs to be resolved into a logical address based on some tbd function
which in turn resolves into a physical address.

Vikas

-----Original Message-----
From: public-ws-addressing-request@w3.org
[mailto:public-ws-addressing-request@w3.org] On Behalf Of Harris Reynolds
Sent: Wednesday, January 19, 2005 10:15 AM
To: 'vikasd@yahoo.com'; public-ws-addressing@w3.org
Subject: RE: EPR to UDDI Mapping


There isn't currently a mapping from WSA to UDDI, although I am not sure
that one will be needed.  A lot of times an EPR will be part of an
interaction.  Node A sends B a message and includes a ReplyTo EPR specifying
where a response should be sent.

I am still not convinced that EPR are intended to be "stored" in the same
way that services are saved to a UDDI Registry.  EPRs seem to be more
transitory in nature.

The discussion on physical vs. logical addresses is interesting in this
context.  From my perspective the physical address (transport specific
location) should be stored, but the logical address (the ERP) likely will
not need to be.

It will be interesting to see what happens in practice in this area.  As a
working group we will have a lot of educating to do to ensure the
specification is used as designed.


Harris Reynolds
webMethods, Inc.

-----Original Message-----
From: public-ws-addressing-request@w3.org
[mailto:public-ws-addressing-request@w3.org] On Behalf Of Vikas Deolaliker
Sent: Wednesday, January 19, 2005 12:24 PM
To: public-ws-addressing@w3.org
Cc: vikasd@yahoo.com
Subject: EPR to UDDI Mapping


Is their a specification that show how a service can discover an existing
EPR? Is their a UDDI binding defined for WSA-Core? 

In general, how can one discover/search for an EPR without an hallway
conversation? 

Thanks 

Vikas 
Received on Thursday, 20 January 2005 01:10:33 GMT

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