The GAF ontology defines two relations:
- gaf:denotedBy relates an instance to a mention of this instance
- gaf:denotes relates a mention to the instance it refers to
The following classes are defined:
- Instances: a general class of any kind of entities (including events, locations, people, etc., even a mention can be included in this class)
- Mentions: members of this class refer to some entity
The GAF ontology can be found here.