RE: [soa-forum] Definitions of SOA (U)

["Mabry, Roy, Mr, OSD-NII" <Roy.Mabry@xxxxxxx>]

UNCLASSIFIED

 

Hi,

 

In regard to the definition of service, shouldn't it include the notion that the service has to be exposed to the external environment by a technical and business interface?

 

Vr, Roy

---

From: soa-forum-bounces@xxxxxxxxxxxxxx [mailto:soa-forum-bounces@xxxxxxxxxxxxxx] On Behalf Of Chris Harding
Sent: Friday, May 05, 2006 8:31 AM
To: Service-Oriented Architecture CoP; 'Service-Oriented Architecture CoP'
Cc: soa@xxxxxxxxxxxxx
Subject: [soa-forum] Definitions of SOA

Hi -

As a further update, here is the definition of SOA that 
was presented at The Open Group conference last week (and which we have shared 
with the OMG).

SOA is an architectural style that supports 
service orientation

•Service orientation
A way of a way 
of thinking in terms of services and service based development and the outcomes 
that services bring

•Service
A logical representation of a 
repeatable business activity that has a specified outcome (e.g., check customer 
credit; provide weather data, consolidate drilling reports), is self-contained 
and maybe composed of other Services. It is a black box to consumers of the 
Service

•Architectural Style
The combination of distinctive 
features in which Enterprise Architecture is done, or expressed

•The 
SOA Architectural style’s distinctive features:
  – Based on the 
design of the services comprising an enterprise’s
     
(or inter-enterprise) business processes. Services mirror 
real-world
     business activity
  – Service 
representation utilizes business descriptions. 
Service
     representation requires providing its 
context (including business
     process, goal, rule, 
policy, service interface and service component)
     and 
service orchestration to implement service
  – Has unique requirements 
on infrastructure. Implementations are
     recommended 
to use open standards, realize interoperability and 
     
location transparency.
  – Implementations are environment specific, 
they are constrained or
    enabled by context and must be 
described within their context.
  – Requires strong governance of 
service representation and implementation
  – Requires a “Litmus Test", 
which determined a “good service”

At 20:31 04/05/2006, Cory Casanave 
wrote:

As an update from the OMG meeting last week, the SOA SIG adopted the following definition of SOA;

 

Service Oriented Architecture is an architectural style for a community of providers and consumers of services to achieve mutual value, that:

• Allows participants in the communities to work together with minimal co-dependence or technology dependence
• Specifies the contracts to which organizations, people and technologies must adhere in order to participate in the community
• Provides for business value and business processes to be realized by the community
• Allows for a variety of technology to be used to facilitate interactions within the community

 

 

The corresponding definition of service has not yet been finalized but the sense of the group is that there would be both a business/domain centric notion of service as well as an interaction focused definition.

 

In both cases this seems to fit well with the notion of SOA that is evolving in this group and in the SOA Demo.

 

Regards,

Cory Casanave
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Regards,

Chris
+++++

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