W3C home > Mailing lists > Public > www-ws-arch@w3.org > March 2002

D-AG0011 - Consistency

From: <michael.mahan@nokia.com>
Date: Tue, 12 Mar 2002 09:45:00 -0500
Message-ID: <5C76D29CD0FA3143896D08BB1743296A61ED6F@bsebe001.NOE.Nokia.com>
To: <www-ws-arch@w3.org>
I miscoded the subject line on the first post. My apologies for 
the confusion.

Mike


> -----Original Message-----
> From: Mahan Michael (NRC/Boston) 
> Sent: March 08, 2002 01:06 PM
> To: www-ws-arch@w3.org
> Subject: D-AG0014 - Consistency 
> 
> 
> This is the kickoff for Goal D-AG0011. I hope we have a 
> lively discussion.
> 
> CURRENT GOAL STATEMENT: 
> Web Services are consistent with the existing web and its 
> heterogenous environment and distributed architecture to the 
> greatest extent possible.
> 
> REFINED GOAL STATEMENT: 
> Pending
> 
> DISCUSSION:
> 1. Goal AG0004 covers platform independence. How is this 
> different from heterogeneous environment language of this 
> goal? Reading AG0004 - I am not sure that it is the platform 
> independence which is precluding programming models or 
> communication modes. If the focus of AG0004 is on 
> independence of programming models and communication modes, I 
> think it should remove the platform independence aspect and 
> leave that to this goal, AG0011. 
> For convenience, here is AG0004: "ensures platform 
> independence of web services components in a way that does 
> not preclude any programming model nor assume any particular 
> mode of communication between the individual components"
> 
> 2. I think that this goal is sufficiently exclusive relative 
> to AG0008 ("is coherent and consistent in its definition"), 
> at least the way I read AG0008. I believe (and can certainly 
> be wrong here) that AG0008 talks to the way WS-A describes 
> and models the reference architecture from a notation or 
> syntactic perspective rather than whether the resultant 
> definition is consistent with the existing web, which is the 
> topic of this goal, AG0011. Please correct me if I am wrong, 
> because then AG0008 and AG0011 should be combined, or one 
> should be killed off or redefined.
> 
> 3. Extracting goals from this statement of 'consistency'. To 
> be consistent with something, we need to get at the salient 
> properties of the target. The goal suggests 2 properties - 
> heterogeneous environment and distributed architecture. How 
> about other properties which are can turn into measurable or 
> observable criteria, hopefully leading to requirements:
> - web protocols: TCP, HTTP, URI, XML (may get in trouble here), XMLP
> - web architectural constraints or principals: universal 
> identifiers, simplicity, opaqueness, decentralization, 
> statelessness, REST issues: "scalability of component 
> interactions, generality of interfaces, immediate deployment 
> of components,  and intermediary components to reduce 
> interaction latency, enforce security, and encapsulate legacy 
> systems" [1]
> - other properties?
> 
> 
> CRITICAL SUCCESS FACTORS:
> 
> Pending
> 
> 
> DERIVED REQUIREMENTS:
> 
> Pending
> 
> 
> [1] 
> http://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arch_style.htm
> 
> 
> 
Received on Tuesday, 12 March 2002 09:45:53 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Tuesday, 3 July 2007 12:24:56 GMT