interval equals https://www.commoncoreontologies.org/TimeOntology A Temporal Interval INT1 is equal to some Temporal Interval INT2 iff there exists Temporal Instants inst1 and inst2 such that inst1 is the starting instant of both INT1 and INT2 and inst2 is the ending instant of both INT1 and INT2. J. F. Allen and J. A. G. M. Koomen. Planning using a temporal world model. In Proceedings of the 8th International Joint Conference on Artificial Intelligence (IJCAI-1983) pages 741–747. Available at: https://www.ijcai.org/Proceedings/83-2/Papers/036.pdf interval disjoint one-dimensional temporal region