RE: Top cloud in triangle/rectangle diagram

David,

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 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.

-- 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 4:24 PM
To: Sedukhin, Igor; www-ws-arch@w3.org
Subject: RE: Top cloud in triangle/rectangle diagram


At 02:09 PM 10/4/2002 -0400, Sedukhin, Igor wrote:
>I think last diagram (slide 4) [of
>http://lists.w3.org/Archives/Public/www-ws-arch/2002Oct/0062.html ] misses 
>a role of an "Advetrizer" to be consistent. It could be that e-mail server 
>that distributed the spam. Because if not, then why have roles of a 
>Service and Requestor? We can have an architecture with only one line and 
>name it "Activity". I'm sure that'll get the group consensus :).

The Service and Requester are individual roles because we consider them to 
be significant to the architecture that we're defining.  You may consider 
"Advertizer" to be a significant role also.  That's a valid point of view, 
and is illustrated on Slide1 and Slide2 (with different labels).  But the 
point of Slide3 and Slide4 is to show that it isn't the ONLY valid point of 
view.  The "Advertise" arc in Slide4 does not require a third party role 
any more than the "Interact" arc does.  Physically there might be all kinds 
of intermediaries between them, but at the level of architectural 
abstraction, they are both direct connections.


-- 
David Booth
W3C Fellow / Hewlett-Packard
Telephone: +1.617.253.1273

Received on Friday, 4 October 2002 17:53:42 UTC