Definition of an association (for specific participant).

Item Summary
Name	Type	Multiplicity	Description
ref	property ItemPathType	[1,1]	Path of the association that this definition describes.
focus	container ComplexProcessingFocusDefinitionType	[0,1]	The "focus side" of this mapping, i.
attribute	container ResourceAttributeDefinitionType	[0,-1]	Processing of given association object attribute in the context of this association.
objectRef	container ResourceAttributeDefinitionType	[0,-1]	Processing of a reference to the object-side of this association.
activation	container ResourceActivationDefinitionType	[0,1]	Definition of activation handling for this association.
correlation	container CorrelationDefinitionType	[0,1]	How objects of this type are correlated to focus objects?
synchronization	container ItemSynchronizationReactionsType	[0,1]	TODO

Items
- ref
  
  Flags: RAM,runtime
  
  Multiplicity: [1,1]
  
  Path of the association that this definition describes. It may be the name of an existing reference attribute, or (in the future) it may be a separate one.
- focus
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  The "focus side" of this mapping, i.e., to which part(s) of the focus object should be the given resource object item mapped.
- attribute
  
  Flags: RAM,runtime
  
  Multiplicity: [0,-1]
  
  Processing of given association object attribute in the context of this association. (In the future, even appearance of the attribute can be redefined here - maybe!)
- objectRef
  
  Flags: RAM,runtime
  
  Multiplicity: [0,-1]
  
  Processing of a reference to the object-side of this association. The object can be specified exactly (via "ref" property), or kept implicit, if there's only one object.
- activation
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  Definition of activation handling for this association.
- correlation
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  How objects of this type are correlated to focus objects?
- synchronization
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  TODO