[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]
Subject: RE: [soa-rm] Good Recent SOA Piece: "Managing an XML Data Model In Your SOA - Best Practices"
The problem with “canonical data model” is that it does not scale with time. Eventually it will not canonicalize but constrain the richness of communication that is expected among various SOA entities.
IMHO SOA data mode should aim to define (a) the interfaces used by SOA entities to exchange information, (b) mechanisms to discover these interfaces and (c) mechanisms to negotiate a vocabulary/format for data exchange over these discovered interfaces.
Vikas
From: Chiusano Joseph [ mailto:chiusano_joseph@bah.com]
Sent: Friday, May 06, 2005 9:23 AM
To: Frank McCabe; Ken Laskey
Cc: soa-rm@lists.oasis-open.org
Subject: RE: [soa-rm] Good Recent SOA Piece: "Managing an XML Data Model In Your SOA - Best Practices"
I think some additional context may not have been provided below. While the article does state "This article does not discuss how to integrate data models", it is stated in the context of "this article will not get into this topic because it is either out of scope or too complex to discuss".
The author is actually a strong proponent of having an integrated data model, as they depict an integrated data model as one of the layers of their approach. I interpret this as a "canonical data model", which is a special type of data model used for data exchange.
Joe
Joseph Chiusano
Booz Allen Hamilton
Visit us online@ http://www.boozallen.com
From: Frank McCabe [ mailto:frank.mccabe@us.fujitsu.com]
Sent: Fri 5/6/2005 12:03 PM
To: Ken Laskey
Cc: Chiusano Joseph; soa-rm@lists.oasis-open.org
Subject: Re: [soa-rm] Good Recent SOA Piece: "Managing an XML Data Model In Your SOA - Best Practices"
+1
Frank
On May 6, 2005, at 8:45 AM, Ken Laskey wrote:
> The critical line in this article is
>
> This article does not discuss how to integrate data models.
>
> Its premise is the tried (and usually failed) that if we all get
> into a room and be reasonable we can all find a common vocabulary
> to map to. I could go on about when that works and when that
> doesn't (see my OASIS Symposium presentation for more) but if that
> is the basis of SOA, then it will go no further than any other
> integration paradigm. The driving question is how do you create a
> system (service?) to do semantic negotiation between diverse
> vocabularies in a way that is (1) visible, (2) reusable, and (3)
> allows you to use what you know (or can find) in ways that enables
> you to do more with little or no effort.
>
> The SOA RM will not specify how this is done but it must also not
> codify an interchange vocabulary paradigm that will not scale.
>
> End of rant:-)
>
> Ken
>
>
> On May 6, 2005, at 10:32 AM, Chiusano Joseph wrote:
>
>
>> Forwarding a good recent SOA piece[1] for those interested in
>> reading it. Covers the notion of an integrated data model as a
>> foundational concept; also presents a 6-layer approach to SOA
>> (about mid-article).
>>
>> Joe
>>
>> [1] http://www.tdan.com/i032ht02.htm
>>
>>
>> Joseph Chiusano
>>
>> Booz Allen Hamilton
>>
>> Visit us online@ http://www.boozallen.com
>>
>>
>>
> ----------------------------------------------------------------------
> --------------------
> Ken Laskey
> MITRE Corporation, M/S H305 phone: 703-983-7934
> 7515 Colshire Drive fax: 703-983-1379
> McLean VA 22102-7508
>
> *** note change of phone extension from 883 to 983 effective
> 4/15/2005 ***
>
[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]