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WSMO Ontologies – Instances
- Instances are either defined explicitly or by a link to an instance store, i.e., an external storage of instances and their values
- An explicit definition of instances of concepts is as follows:
Class instance sub-Class wsmoElement
hasType type concepthasAttributeValues type attributeValue
Class attributeValue sub-Class wsmoElement
hasAttribute type attribute multiplicity = single-valued
hasValue type {instance, literal, anonymousId}
Example: Mary is parent of the twins Paul and Susan
- Instances of relations (with arity n) can be seen as n-tuples of instances of the concepts which are specified as the parameters of the relation
Class relationInstance sub-Class wsmoElement
hasType type relation
hasParameterValue type parameterValue
Class parameterValue sub-Class wsmoElement
hasParameter type parameter multiplicity = single-valued
hasValue type {instance, literal, anonymousId} multiplicity = single-valued
Example: The distance between Innsbruck and Munich is 234 kilometers
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