[Submitted on behalf of Peter Lane]

I don't understand what ContainedResourceAttributes is. Is this an aggregation of all the activities' resource 
attributes? If so, why isn't obtaining this data done through an operation like GetActivitiesStatus or GetJSDLDocuments?
 Aggregation of activity attributes is problematic from an implementation point of view. It forces the implementation to
 compromise between freshness of the data and performance of the services. Granted one could implement a dynamic 
attribute that gets populated on demand, but this seems inconsistent with the way the other aggregated data is handled.