Last modified date is: 2010-03-08

Graphical representation

Diagram

General description

Name:	Transition
Submitted by:	AldoGangemi
Also Known As:
Intent:	To represent basic knowledge about transitions (events, states, processes, objects).
Domains:	General, Workflow, Manufacturing
Competency Questions:	What states of some object are changed by what event during a transition? What is the process that is invariant through the transition? What transitions are occurring on what object at what time?
Solution description:	This pattern composes the Time-indexed participation, Region, and Sequence patterns in order to represent changing of states for objects, fired by some event, through an underlying process.
Reusable OWL Building Block:	1 (568)
Consequences:	We are able to represent part of the semantics involved in transitions (e.g. what is implied by Petri Nets): initial and final states, causal events, underlying processes, affected objects, and sequences of time intervals for situations and events. However, it is not possible to define axioms for automatically infer initial and final states from time sequences, because coreference is not allowed in OWL (not even in OWL2).
Scenarios:	The addition of Bud Powell on piano made the tune jump from a static, aerial comping into a hard driving swing improvisation
Known Uses:
Web References:
Other References:
Examples (OWL files):
Extracted From:
Reengineered From:
Has Components:	Submissions:Region Submissions:Sequence Submissions:Time indexed participation
Specialization Of:
Related CPs:

Elements

The Transition Content OP locally defines the following ontology elements:

hasEventAtTime (owl:ObjectProperty) The time of the event causing the transition.

hasEventAtTime page

hasFinalStateAtTime (owl:ObjectProperty) The time of the final state of the transition.

hasFinalStateAtTime page

hasInitialStateAtTime (owl:ObjectProperty) The time of the initial state in the transition.

hasInitialStateAtTime page

includesFinalSituation (owl:ObjectProperty) A relation between a transition situation and the situation resulting from the transition.

includesFinalSituation page

includesInitialSituation (owl:ObjectProperty) A relation between a transition situation and the situation existing before the transition event.

includesInitialSituation page

includesProcess (owl:ObjectProperty) A relation between a transition situation and the underlying process that is invariant for the object(s) included in the transition.

includesProcess page

isFinalSituationIncludedIn (owl:ObjectProperty) A relation between a transition situation and the situation resulting from the transition.

isFinalSituationIncludedIn page

isInitialSituationIncludedIn (owl:ObjectProperty) A relation between a transition situation and the situation existing before the transition event.

isInitialSituationIncludedIn page

isProcessIncludedIn (owl:ObjectProperty) A relation between a transition situation and the underlying process that is invariant for the object(s) included in the transition.

isProcessIncludedIn page

isTimeOf (owl:ObjectProperty)

isTimeOf page

occursAt (owl:ObjectProperty)

occursAt page

Process (owl:Class) The invariance under some different transitions (including the one represented here), in which at least one Object is situated.

Process page

Transition (owl:Class) In this pattern, it is the entity that is invariant across the Process underlying the transition, but is also changed from an initial to a final state by an Event.

A transition is a Situation that creates a context for three TimeInterval(s), two additional different Situation(s), one Event, one Process, and at least one Object: the Event is observed as the cause for the transition, one Situation is the state before the transition, the second Situation is the state after the transition, the Process is the invariance under some different transitions (including the one represented here), in which at least one Object is situated. Finally, the time intervals position the situations and the transitional event in time.

This class of situations partly encodes the ontology underlying typical engineering algebras for processes, e.g. Petri Nets.

A full representation of the transition ontology is outside the expressivity of OWL, because we would need qualified cardinality restrictions, coreference, property equivalence, and property composition.

Transition page

Additional information

A simple pattern to represent transitions between states.

Scenarios

Scenarios about Transition

No scenario is added to this Content OP.

Reviews

Reviews about Transition

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Other info at evaluation tab

Modeling issues

Modeling issues about Transition

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