Reference to a metric - either by identifier (for explicitly defined ones) or by mark OID (for event mark based).

Item Summary
Name	Type	Multiplicity	Description
identifier	property string	[0,1]	Identifier of an explicitly defined (custom) metric.
builtIn	property BuiltInSimulationMetricType	[0,1]	Identifier of a built-in metric.
eventMarkRef	reference ObjectReferenceType	[0,1]	Reference to an event mark.

Items
- identifier
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  Identifier of an explicitly defined (custom) metric.
- builtIn
  
  Flags: RAM,runtime,AVals:4
  
  Multiplicity: [0,1]
  
  Identifier of a built-in metric.
- eventMarkRef
  
  Flags: RAM
  
  Multiplicity: [0,1]
  
  Reference to an event mark.