| interface  | IAAlt | The interactionOperator 'alt' designates that the CombinedFragment represents a choice of behavior. | 
| interface  | IAAssert | The interactionOperator 'assert' designates that the CombinedFragment represents an assertion. | 
| interface  | IABreak | The interactionOperator 'break' designates that the CombinedFragment represents a breaking scenario in the sense that the operand  is a scenario that is performed instead of the remainder of the enclosing InteractionFragment. | 
| interface  | IAConsider | The interactionOperator 'consider' designates which messages  should be considered within this combined fragment. | 
| interface  | IACritical | The interactionOperator 'critical' designates that the CombinedFragment represents a critical region. | 
| interface  | IAIgnore | The interacionOperator 'ignore' designates that there are some message types  that are not shown within this combined fragment. | 
| interface  | IALoop | The interactionOperator 'loop' designates that the CombinedFragment represents a loop. | 
| interface  | IANeg | The interactionOperator 'neg' designates that the CombinedFragment represents traces that are defined to be invalid. | 
| interface  | IAOpt | The interactionOperator 'opt' designates that the CombinedFragment represents a choice of behavior where either the (sole) operand  happens or nothing happens. | 
| interface  | IAPar | The interactionOperator 'par' designates that the CombinedFragment represents a parallel merge between the behaviors of the operands . | 
| interface  | IASeq | The interactionOperator 'seq' designates that the CombinedFragment represents a weak sequencing between the behaviors of the operands . | 
| interface  | IAStrict | The interactionOperator 'strict' designates that the CombinedFragment represents a strict sequencing between the behaviors of the operands . |