interval is after https://www.commoncoreontologies.org/TimeOntology A TemporalInterval INT2 is after some TemporalInterval INT1 iff there exists TemporalInstants inst2, inst1 such that inst2 is the starting instant of INT2 and inst1 is the ending instant of INT1 and inst2 is after inst1. 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 interval is before one-dimensional temporal region