Temporally enhanced ontologies in OWL: A shared Conceptual Model and Reference Implementation

The temporal dimension has been recognized as an integral feature of many Semantic Web applications, but there are significant differences in how ontology authors choose to represent changes in time. We present a temporal conceptual model for OWL DL ontologies that allows the expression of fluent properties, i.e., properties that change in time, that is both representation-agnostic and serializable for the various available representation schemes. We also provide Kala, a reference implementation developed in Java, that can be used to generate temporal ontologies, convert between temporal ontologies in different representation schemes, and develop new applications such as temporal querying or visualization tools.

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