The Spatial Data on the Web Interest Group has published two First Public Interest Group Notes:
- Extensions to the OWL-Time Ontology – entity relations
- Extensions to the OWL-Time Ontology – temporal aggregates
OWL-Time [owl-time] is an ontology for temporal entities and relations between them. OWL-Time defines simple temporal entities (intervals and instants). The entity relations note adds four new relations:
time:notDisjoint which complement the original relations and allow for description of more relationships between temporal entities. The temporal aggregates note adds one new class
time:TemporalAggregate and two properties
time:hasPart and its inverse
time:isPartof to allow for the description of arbitrary aggregates of temporal entities.