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Last modified date is: 2009-03-10

General description

Name:	Situation
Submitted by:	ValentinaPresutti
Also Known As:
Intent:	To represent facts, circumstances, observed contexts.
Domains:	General
Competency Questions:	What entities are in the seeting of a certain situation?
Solution description:
Reusable OWL Building Block:	1 (770)
Consequences:	This CP allows the designer to model both a certain situation, and the entities that are involved. It provides designers with a vocabulary for representing n-ary relations.
Scenarios:	I prepared a coffee with my heater, 300 ml of water, and an Arabica coffee mix.
Known Uses:
Web References:
Other References:
Examples (OWL files):	http://www.ontologydesignpatterns.org/cp/examples/situation/coffee.owl
Extracted From:	http://www.loa-cnr.it/ontologies/DUL.owl
Reengineered From:
Has Components:
Specialization Of:
Related CPs:	Submissions:Submissions:Description

Elements

The Situation Content OP locally defines the following ontology elements:

Entity (owl:Class) Anything: real, possible, or imaginary, which some modeller wants to talk about for some purpose.

Entity page

Situation (owl:Class) A view on a set of entities. It can be seen as a 'relational context', reifying a relation.

For example, a PlanExecution is a context including some actions executed by agents according to certain parameters and expected tasks to be achieved from a Plan; a DiagnosedSituation is a context of observed entities that is interpreted on the basis of a Diagnosis, etc.

Situation is also able to represent reified n-ary relations, where isSettingFor is the top-level relation for all binary projections of the n-ary relation. If used in a transformation pattern for n-ary relations, the designer should take care of:

- creating only one situation for each instance of an n-ary relation, otherwise the 'identification constraint' (Calvanese et al., IJCAI 2001) could be violated

- adding an 'exact cardinality' restriction corresponding to the arity of the n-ary relation, otherwise the designer would actually represent a polymorphic relation.

Situation page

hasSetting (owl:ObjectProperty) A relation between entities and situations, e.g. 'this morning I've prepared my coffee with a new fantastic Arabica' (i.e.: (an amount of) a new fantastic Arabica hasSetting the preparation of my coffee this morning).

hasSetting page

isSettingFor (owl:ObjectProperty)

isSettingFor page

Scenarios

Scenarios about Situation

No scenario is added to this Content OP.

Reviews

Reviews about Situation

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