Specification of how metric values are aggregated. There are two key terms here: - domain: The set of objects for which the metric is computed (and thus aggregated); - selection: The set of "more relevant" objects is used in some aggregation functions, like SELECTION_SIZE_TO_DOMAIN_SIZE or SELECTION_TOTAL_VALUE_TO_DOMAIN_TOTAL_VALUE.

Item Summary
Name	Type	Multiplicity	Description
aggregationFunction	property SimulationMetricAggregationFunctionType	[0,1]	An aggregation function used to compute the (aggregated) metric value.
source	container SimulationMetricReferenceType	[0,1]	Source metric that is to be aggregated.
domainRestriction	container SimulationObjectPredicateType	[0,1]	Restriction of the domain of original metric.
selectionRestriction	container SimulationObjectPredicateType	[0,1]	Restriction of the "selection" predicate of original metric.

Items
- aggregationFunction
  
  Flags: RAM,runtime,AVals:13
  
  Multiplicity: [0,1]
  
  An aggregation function used to compute the (aggregated) metric value.
- source
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  Source metric that is to be aggregated. The metric must be present on individual processed objects, i.e. it is not possible to aggregate the aggregation-only metric.
- domainRestriction
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  Restriction of the domain of original metric.
- selectionRestriction
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  Restriction of the "selection" predicate of original metric.