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RE: Top cloud in triangle/rectangle diagram

From: Heather Kreger <kreger@us.ibm.com>
Date: Mon, 7 Oct 2002 13:19:27 -0400
To: "Sedukhin, Igor" <Igor.Sedukhin@ca.com>, <www-ws-arch@w3.org>
Message-ID: <OF39F674DF.F4AF7867-ON87256C4B.005EA9D4@us.ibm.com>





+1 Igor.

In fact, the origional text submitted for the publish and find interactions
include very broad interpretations of these interactions, inclusive of
sneakernet, phone calls, and email attachments.

David's scenario is valid and works fine. I don't see it 'breaking' the
roles in the triangle.  I have always supported that the 'top cloud' (I
missed our meeting and haven't caught up with my mail to find out if we
have a new official name yet) role is not specifically required in every
scenario and that roles may be collapsed.

However, the  'top cloud' role is still essential to the SOA model.

Heather Kreger
Web Services Lead Architect
STSM, SWG Emerging Technology
kreger@us.ibm.com
919-543-3211 (t/l 441)  cell:919-496-9572


"Sedukhin, Igor" <Igor.Sedukhin@ca.com>@w3.org on 10/07/2002 11:49:09 AM

Sent by:    www-ws-arch-request@w3.org


To:    "David Booth" <dbooth@w3.org>, <www-ws-arch@w3.org>
cc:    "Cutler, Roger (RogerCutler)" <RogerCutler@ChevronTexaco.com>
Subject:    RE: Top cloud in triangle/rectangle diagram




David,

Here is my interpretation of the Roger's scenario [at
http://lists.w3.org/Archives/Public/www-ws-arch/2002Oct/0072.html]

The guy in Widgets-R-Us who picked up the phone and then received an e-mail
with the WSDL did "Find" a service.
The guy in FredCo who responded to the phone call and then e-mailed the
WSDL, played a role of an "Advertizer".
The other guy in FredCo who created a WSDL or otherwise told the
"Advertizer" guy about the WSDL did "Publish" a service.

I think the proper architectural roles were played well :).

I hope I'm not trying to be difficult :), but I'd like to see a BASIC WS
architecture that does not need the act of meeting two parties and
therefore does not need those roles.

-- Igor Sedukhin .. (igor.sedukhin@ca.com)
-- (631) 342-4325 .. 1 CA Plaza, Islandia, NY 11788


-----Original Message-----
From: David Booth [mailto:dbooth@w3.org]
Sent: Friday, October 04, 2002 9:06 PM
To: Sedukhin, Igor; www-ws-arch@w3.org
Cc: Cutler, Roger (RogerCutler)
Subject: RE: Top cloud in triangle/rectangle diagram


At 05:53 PM 10/4/2002 -0400, Sedukhin, Igor wrote:
>When a Service advertises itself to the Requestor, does it not play a
>role
>of an Advertiser? Roles can collapse into one compound role, but from the
>logical point of view they are still atomically separate in the
architecture.
>
>So, it seems that Slide 4 [at
>http://lists.w3.org/Archives/Public/www-ws-arch/2002Oct/0062.html ] says
>that roles of Service and Advertiser are collapsed, and if the right
>circle said Service/Advertiser it would be very valid interpretation of
>the triangle. I don't think there is a contradiction with the triangle and
>three roles in it.

Yes, I see what you mean.  You could describe it that way, but that's still
assuming that the role of "Advertiser" is required as a significant
architectural component.  It could be for a particular EXTENDED
architecture, but I don't think it's needed or desirable for our BASIC
architecture.  I think the scenario described in
http://lists.w3.org/Archives/Public/www-ws-arch/2002Oct/0072.html helps
make this clearer.  (That scenario was actually inspired by the business
need that Roger Cutler described at our last F2F, incidentally.)


--
David Booth
W3C Fellow / Hewlett-Packard
Telephone: +1.617.253.1273
Received on Monday, 7 October 2002 13:19:30 GMT

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