SMM — Improve Observations

The Observation class was not sufficient to capture the scope of the models that were part of the observation and also it didn't identify which measures either should be calculated or had been calculated once completely built. The changes here address these short-comings.

Discussion:

Summary of change:
· Added a new "ObservationScope" class that defines the following:
o scopeUri along with its format and allowable content
· Added 2 new associations to the Observation class
o one to ObservationScope
o and the other to SmmElement, but with a constraint to Category, CategoryRelationship or Measure. This allows to define the "to build" list based not only on specifying measures, but by category or even categoryRelationship.

• Added a new “ObservationScope” class that defines the following:
o scopeUri along with its format and allowable content
• Added 2 new associations to the Observation class
o one to ObservationScope
o and the other to SmmElement, but with a constraint to Category, CategoryRelationship or Measure. This allows to define the “to build” list based not only on specifying measures, but by category or even categoryRelationship.