ISSUE 15 -- Are policySets additive or overrideable

[ashok malhotra <ashok.malhotra@oracle.com>]

We had a discussion on today's call whether policySets on services, 
references and bindings can be overridden by the
component or do the policySets on the component add to what's already 
attached to services, references and bindings.
Here is what I found in the Assembly 1.00 spec:

412 Most of the characteristics of the services, references and 
properties may be overridden by a
413 component that uses and configures the implementation, or the 
component can decide not to
414 override those characteristics. Some characteristics cannot be 
overridden, such as intents.
415 Other characteristics, such as interfaces, can only be overridden in 
particular controlled ways
416 (see the Component section for details).

The component section does not explicitly mention whether the policySets 
attached to the component add to or
override the policySets on services, references and bindings.  We need 
to decide this to make progress.

Here's my 2 cents:
- a policySet that provides a qualified intent overrides a policySet 
that provides the same intent in the unqualified form
- if a policySet from a component provides the identical intent as a 
policySet on a service, reference and binding the
policySet from the component overrides
- in all other cases, the policySets on the component add to the 
policySets on services, references and bindings
-- 
All the best, Ashok