Submissions:Symmetric n-ary relationship
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| - | |Motivation=The symmetric n-ary relationship pattern emerged from the need of modelling distances among two points. | + | |Motivation=The symmetric n-ary relationship pattern emerged from the need of modelling distances among two points. |
| - | |Aim=This pattern allows representing symmetric n-ary relationships, i.e. binary relationships between two elements that need a further argument that has the same value for both directions of the relationship. If SNAry is the symmetric n-ary relationship and z is its value for the elements x and y, then: | + | This problem is a clear case of an n-ary relationship where the relation between two points needs a further argument to represent the distance between such points. |
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| + | Once we have applied the n-ary pattern for this use case (http://www.w3.org/TR/swbp-n-aryRelations/#useCase1), we can realize that the origin and the destination of the n-ary relation belong to the same class. In addition, the value for the relationship is the same to represent the distance from A to B and vice-versa. Then, if we want to represent both distances we should instanciate the pattern twice, from A to B and vice-versa, resulting in a redundant representation. | ||
| + | |Aim=This pattern allows representing symmetric n-ary relationships, i.e. binary relationships between two elements that need a further argument that has the same value for both directions of the relationship. | ||
| + | If SNAry is the symmetric n-ary relationship and z is its value for the elements x and y, then: | ||
SNAry(x,y)=z iff SNAry(y,x)=z | SNAry(x,y)=z iff SNAry(y,x)=z | ||
| - | |Solution= | + | |Solution=A class to represent the n-ary relationship together with the value for the further needed argument (Relationship or Attribute) has been created. |
| + | A relationship between the abovementioned class and the classes involved in the symmetric n-ary relationship is created. | ||
|Elements=Class, Relationship, Attribute | |Elements=Class, Relationship, Attribute | ||
Axioms: cardinality and equivalentClass | Axioms: cardinality and equivalentClass | ||
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|ProblemExample=For example, we might want to represent the distance expressed in kilometres between two places. | |ProblemExample=For example, we might want to represent the distance expressed in kilometres between two places. | ||
|SolutionExample=http://ontologydesignpatterns.org/wiki/images/b/bd/Symmetric_n-ary_relationship_distance.jpg | |SolutionExample=http://ontologydesignpatterns.org/wiki/images/b/bd/Symmetric_n-ary_relationship_distance.jpg | ||
| - | |Consequences=The main advantage of this pattern is that allows representing distance between places without | + | |Consequences=The main advantage of this pattern is that allows representing distance between places without including redundancy in the ontology. |
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{{Logical OP Reference Template | {{Logical OP Reference Template | ||
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|Event=WOP:2010 | |Event=WOP:2010 | ||
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| + | [[Category:Review assigned]] | ||
Current revision
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If you are author of this proposal or you want to contribute to this pattern's review, you can: specify if this revision takes in account any of the review(s) In general, it could be useful to visit the evaluation section to have information about the evaluation process of this proposal Current revision ID: 10106 |
Graphical representation
Diagram
General information
| Name | Symmetric n-ary relationship |
|---|---|
| Also known as | |
| Author(s) | MariaPoveda, MariCarmenSuarezFigueroa |
| SubmittedBy | MariaPoveda, MariCarmenSuarezFigueroa |
Description
| Motivation | The symmetric n-ary relationship pattern emerged from the need of modelling distances among two points.
This problem is a clear case of an n-ary relationship where the relation between two points needs a further argument to represent the distance between such points. Once we have applied the n-ary pattern for this use case (http://www.w3.org/TR/swbp-n-aryRelations/#useCase1), we can realize that the origin and the destination of the n-ary relation belong to the same class. In addition, the value for the relationship is the same to represent the distance from A to B and vice-versa. Then, if we want to represent both distances we should instanciate the pattern twice, from A to B and vice-versa, resulting in a redundant representation. |
|---|---|
| Aim | This pattern allows representing symmetric n-ary relationships, i.e. binary relationships between two elements that need a further argument that has the same value for both directions of the relationship.
If SNAry is the symmetric n-ary relationship and z is its value for the elements x and y, then: SNAry(x,y)=z iff SNAry(y,x)=z |
| Solution description | A class to represent the n-ary relationship together with the value for the further needed argument (Relationship or Attribute) has been created.
A relationship between the abovementioned class and the classes involved in the symmetric n-ary relationship is created. |
| Elements | Class, Relationship, Attribute
Axioms: cardinality and equivalentClass |
| Implementation | |
| Reusable component | |
| Component type |
Example
| Problem example | For example, we might want to represent the distance expressed in kilometres between two places. |
|---|---|
| Pattern solution example | http://ontologydesignpatterns.org/wiki/images/b/bd/Symmetric_n-ary_relationship_distance.jpg |
| Consequences | The main advantage of this pattern is that allows representing distance between places without including redundancy in the ontology. |
Pattern reference
| Origin | Modelling distance between stages of St James Way during the Geobuddies ontology network development (http://geobuddies.dia.fi.upm.es). |
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| Known use | Geobuddies ontology network |
| Reference | |
| Related ODP | N-ary Relation: New Class (LP-NR -01) |
| Used in combination with | |
| Test |
Additional information
Scenarios
Scenarios about Symmetric n-ary relationship
No scenario is added to this Content OP.
Reviews
Reviews about Symmetric n-ary relationship
| Review article | Posted on | About revision (current is 10106) |
|---|---|---|
| OlafNoppens about Symmetric n-ary relationship | 245545616 September 2010 | 1006610,066 |
| RimDJEDIDI about Symmetric n-ary relationship | 245545616 September 2010 | 1010610,106 |
| AlessandroAdamou about Symmetric n-ary relationship | 245545616 September 2010 | 1010610,106 |
This revision (revision ID 10106) takes in account the reviews: none
Other info at evaluation tab
Modeling issues
Modeling issues about Symmetric n-ary relationship
There is no Modeling issue related to this proposal.
References
| Submission to event |
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