This web site contains various ontologies for research purposes.
Use Case Description Ontology (UCDO). Use cases are a commonly used technique for specifying the functional requirements of a project. This ontology is concerned with the formal representation of the flow of events that occurs in a use case, including alternative flows and exceptional flows. Nonfunctional requirements are specified separately.
Open Ontology Repository Use Cases. Proposed use cases for the Open Ontology Repository. Here is another view of the OOR use cases.
There are a number of issues that these use cases can be used to address:
Ken Baclawski
College of Computer and Information Science
Northeastern University