SCA does not define a model for creating services. It only defines a model for composing services. From my perspective, therefore SCA does not qualify as a component model. And based on the Syzerpski Test, it fails all three tests, because it does not define units or unit deployment, only consumption of units.

Anne

On 12/20/05, jeffrschneider <[EMAIL PROTECTED]> wrote:
> But in reality, SCA is not a component model. The granularity of the
> "components" is different from any previous component model. They are
> services -- not components. SCA is a services assembly model.

Anne,
If you use the 'Syzerpski Test' for components:
1. Is it a unit of independent deployment?
2. Is it a unit of 3rd party consumption
3. Does it have No externally observable state?

Where do you believe SCA fails the 'component' litmus test?

Also, you used the term 'granularity'; what kind of granularity are
you referring to: accounting, abstraction, analysis, compilation,
delivery, deployment, dispute, extension, fault containment,
instantiation, installation, loading, locality, mainteneance, system
management - or the old stand-by, INTERFACE?

Jeff








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