]> This file defines some abstract concepts, and we will provide assertions about this concepts in a separate file. By doing so, we can keep this file in OWL Lite type, and satisfies the basic (normally descriptive) usage of such ontology. Those assertions are used for further inference. This ontology is created by Li Ding -- http://www.csee.umbc.edu/~dingli1/, Harry Chen -- http://www.csee.umbc.edu/~hchen4/, Lalana Kagal -- http://www.cs.umbc.edu/~lkagal1/, Tim Finin -- http://www.csee.umbc.edu/~finin/. $Revision: 1.1 $ Event This is an abstract concept of event. Place This class defines a abstract concept of spatial place, which has an address. This class is borrowed from CoBrA project. The definition can be found at http://daml.umbc.edu/ontologies/cobra/0.3/place#Place Event This class defines a abstract concept of instant. [Def] an infinitesimal space of time; especially: a point in time separating two states, e.g. at the instant of death The definition can be found at http://www.isi.edu/~pan/damltime/time.owl#Instant One Time Event 1 1 1