Timing::Event

Content:

Event : Public abstract Class TimingElementsOrganization, TimingConstraints1, FunctionEvents, Events, EventChainTimingConstraints, EventOccurrenceMappingToEvents, TimingConstraints2

The Event class stands for all the forms of identifiable state changes that are possible to constrain with respect to timing using TADL2. Semantics: An event denotes a distinct form of state change in a running system, taking place at distinct points in time called occurrence of the event. That is, a running system can be observed by identifying certain forms of state changes to watch for, and for each such observation point, noting the times when changes occur. This notion of observation also applies to a hypothetical predicted run of a system or a system model - from a timing perspective, the only information that needs to be in the output of such a prediction is a sequence of times for each observation point, indicating the times that each event is predicted to occur. In system models, events appear syntactically as names indicating the state changes of interest. Semantically, an event name is a variable standing for some statically unknown set of occurrences. Note that this connection is purely conceptual; occurrences never exist concretely in any system model as they are a purely semantic notion representing the state changes that can be observed when a system is executed, or simulated, or perhaps only mathematically predicted. TADL2 assumes that occurrences are characterized by two pieces of information: a timestamp indicating when the corresponding state change occurred, and a color that partitions different event occurrences into groups that should be understood as being causally related. The timestamp is a real value of SI unit seconds, whereas the color value is drawn from some abstract, possibly infinite type whose only restriction is that must support an equality test on its values.

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Element	Source Role	Target Role
SynchronizationConstraint Class	Name:	Name: event
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OrderConstraint Class	Name:	Name: source
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StrongDelayConstraint Class	Name:	Name: source
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OrderConstraint Class	Name:	Name: target
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DelayConstraint Class	Name:	Name: target
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ExecutionTimeConstraint Class	Name:	Name: resume Event corresponding to execution resume folowing preemption
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TransitionEvent Class	Name:	Name: occurredExecutionEvent
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BurstConstraint Class	Name:	Name: event
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EventChain Class	Name:	Name: stimulus The event that stimulates the steps to be taken to respond to this event.
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EventChain Class	Name:	Name: response The event that is a response to a stimulus that occurred before.
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PeriodicConstraint Class	Name:	Name: event
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ArbitraryConstraint Class	Name:	Name: event
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ExecutionTimeConstraint Class	Name:	Name: preemption Event corresponding to execution preemption
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StrongSynchronizationConstraint Class	Name:	Name: event
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ExecutionTimeConstraint Class	Name:	Name: stop
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DelayConstraint Class	Name:	Name: source
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ExecutionTimeConstraint Class	Name:	Name: start
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RepetitionConstraint Class	Name:	Name: event
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StrongDelayConstraint Class	Name:	Name: target
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PatternConstraint Class	Name:	Name: event
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SporadicConstraint Class	Name:	Name: event
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Property	Value
isFinalSpecialization:	0

Object	Type	Connection	Direction	Notes
EventFaultFailure	Class	Generalization	From
ModeEvent	Class	Generalization	From
AUTOSAREvent	Class	Generalization	From
EventFeatureFlaw	Class	Generalization	From
EventFunction	Class	Generalization	From
StateEvent	Class	Generalization	From
ExternalEvent	Class	Generalization	From
EventFunctionPowerPort	Class	Generalization	From
EventFunctionClientServerPort	Class	Generalization	From
TimingDescription	Class	Generalization	To
EventFunctionFlowPort	Class	Generalization	From