agg.attribute
Interfaces 
AttrConditionMember
AttrConditionTuple
AttrContext
AttrDistributionBroker
AttrEvent
AttrInstance
AttrInstanceMember
AttrManager
AttrMapping
AttrMember
AttrObserver
AttrTuple
AttrType
AttrTypeMember
AttrVariableMember
AttrVariableTuple
Exceptions 
AttrException
AttrMatchException