CODEWITHSUNDEEP
ontologyprotege
deepika
deepika

Reputation: 11

How to create multiple relations with same object property?

I am using protege 5 for developing ontology. I have created has_composition as object property. In my ontology the same object_property is used for different domains and their respective range, like has_composition of A is B and has_composition of C and D is E and F.

How can I model this mapping??

Upvotes: 1

Views: 1237

Answers (1)

Richard-Degenne
Richard-Degenne

Reputation: 2959

OWL (Ontology Web Language, the ontology that defines ontologies) does not allow to model what you're trying to do.

A workaround I can think of is to use sub-properties. Imagine the following classes:

  • Pizza
  • TomatoSauce
  • ChocolateCake
  • Chocolate

If you want to define relations such as

  • A Pizza has_composition TomatoSauce, and
  • A ChocolateCake has_composition Chocolate

then define the following relations:

  • has_composition: No domain nor range (or a common superclass such as Dish and Ingredient for example)
    • has_tomato_sauce: Domain Pizza, range TomatoSauce
    • has_chocolate: Domain ChocolateCake, range Chocolate

This will allow the reasoner (the software that computes inferences) to infer that if something has_chocolate a_chocolate, then

  • something rdf:type Chocolate (inferred by the domain of has_chocolate);
  • something has_composition a_chocolate (because has_chocolate is a sub-property of has_composition).

You can check out this example in this Gist I made.

Download it, open it, and start the reasoner. You will see the inferred statements in yellow.

Screenshot of inferred statements

Upvotes: 3

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