View MODAF:SV-12b Service Composition View

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Overview+

From The MODAF System Viewpoint (SV) p46:

The SV-12 series of views specify standard configurations that deliver services. These may be configurations of resources (SV-12a) or configurations which utilise other services (SV-12b). In both cases, these views specify how services are implemented. They do not specify the services themselves (this is covered by the Service Oriented Viewpoint), nor do they describe deployed services.

Subject to Crown Copyright

The SV-12b Service Composition View is part of the MODAF System Viewpoint and one of the 47 MODAF views*.

Version & Date+

Version 1.2.004.

* =  changed at 1.2.004

+ =  new at 1.2.004

See MODAF Release History.

Purpose+

From The MODAF System Viewpoint (SV) p48:

The SV-12b specifies service implementations that use other services.

Subject to Crown Copyright

Background+

From The MODAF System Viewpoint (SV) p46:

The Service Oriented Views (SOVs) in MODAF provide a specification of what a service is to do and how it presents its functionality to service consumers. The SOVs deliberately avoid specifying how a service is to be implemented –– even if that implementation is only based on other services –– so as to maintain the principle of service opacity.

SV-12b specifies how a service implementation uses other services to provide its own service(s).

Subject to Crown Copyright

Description

From The MODAF System Viewpoint (SV) p49:

An SV-12b shows what services are required by a Service Implementation in order to deliver one or more other services. This is effectively a composition of services.

In specifying the services the implementation requires, SV-12b will also specify the level of service required. Similarly, the level of service provided by the implementation will also be specified..

...

Subject to Crown Copyright

Data Objects+

From The MODAF System Viewpoint (SV) p48:

The data in an SV-12b can include:

Subject to Crown Copyright

Presentation+

  • block diagram

Configuration History

1.2.004 - newly created.

Comments

Other Frameworks

See also:

From ‘The MODAF System Viewpoint (SV)’ p48:

Note that the MODAF SV-12b differs to the NAF definition in NSV-12, Service Provision . The closest NAF view to SV-12b is NSOV-6 Service Composition (p76 in NAF Chapter 5 version 3.1).

Subject to Crown Copyright

References


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