Submissions:N-Ary Relation Pattern (OWL 2) - Revision history

RinkeHoekstra at 17:02, 13 October 2010

2010-10-13T17:02:58Z

RinkeHoekstra: Article is waiting for review.

2010-10-13T12:58:26Z

Article is waiting for review.

RinkeHoekstra at 10:47, 13 October 2010

2010-10-13T10:47:57Z

RinkeHoekstra at 10:35, 13 October 2010

2010-10-13T10:35:53Z

RinkeHoekstra: New page: {{Logical_OP_Proposal_toolbar}} {{Graphical representation header}} {{Graphical representation |ImageName=Image:Nary-relation.png }} {{Logical OP General Template |Name=N-Ary Relation Patt...

2010-10-13T10:33:59Z

New page: {{Logical_OP_Proposal_toolbar}} {{Graphical representation header}} {{Graphical representation |ImageName=Image:Nary-relation.png }} {{Logical OP General Template |Name=N-Ary Relation Patt...

New page

{{Logical_OP_Proposal_toolbar}}
{{Graphical representation header}}
{{Graphical representation
|ImageName=Image:Nary-relation.png
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{{Logical OP General Template
|Name=N-Ary Relation Pattern (OWL 2)
|SubmittedBy=Rinke Hoekstra
|Author=Rinke Hoekstra
}}
{{Logical OP Description Template
|Motivation=OWL does not support N-Ary relations. This means that an n-ary relation can only be represented in its reified form in OWL. This is problematic, as the relational character is then completely lost.
|Aim=The aim of this pattern is to allow the inference of property relations between the different relata of the original N-Ary relation based on its reification.
|Solution=The N-Ary relation is reified by creating a class for the relation (NR), and creating properties and classes for the domain (D) and ranges (R1-Rn) of the relation (that is, if the relation is directional). The NR class is specified using a local reflexivity restriction of the form: NR equiv is_NR some Self. We then specify role chains for each of the binary relations between the domain and ranges. For instance: has_NR o is_NR o r1 -> has_r1
|Elements=OWL 2 local reflexivity and property chains.
|Implementation=Alter the axioms in the reusable component to suit your needs. The component contains an N-Ary relation with four ranges and a domain. This can easily be extended or reduced.

|ReusableComponent=http://purl.org/net/nary-relation
|ComponentType=OWL 2 RDF/XML
}}
{{Logical OP Example Template
|ProblemExample=See the picture, where the cancer diagnosis relation of the SWBP N-Ary relations patterns is expressed using this design pattern.
|Consequences=The patient (Christine, P) is related both to the diagnosis value (Cancer) and its probability.
}}
{{Logical OP Reference Template}}
{{Additional information header}}
This pattern is made available under the CC-BY licence (http://creativecommons.org/licenses/by/2.0/). Under this licence the pattern can be freely reused but reusers should include an attribution to the original author (Rinke Hoekstra)
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 In your academic publications, please refer to this pattern by citing:
 Rinke Hoekstra. Ontology Representation – Design Patterns and Ontologies that Make Sense, volume 197 of Frontiers of Artificial Intelligence and Applications. IOS Press, Amsterdam, June 2009.
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-|ImageName=Image:Nary-relation.png
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 |Elements=OWL 2 local reflexivity and property chains.
 |Implementation=Alter the axioms in the reusable component to suit your needs. The component contains an N-Ary relation with four ranges and a domain. This can easily be extended or reduced.
 |ReusableComponent=http://purl.org/net/nary-relation
 |ComponentType=OWL 2 RDF/XML