interval disjoint https://www.commoncoreontologies.org/TimeOntology A Temporal Interval INT1 is disjoint with a Temporal Interval INT2 iff INT1 is before or meets INT2 OR INT2 is before or meets INT1. In other words, INT1 and INT2 are disjoint iff INT1 and INT2 do not overlap, contain, or equal one another. 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 overlapped by interval contains interval contained by one-dimensional temporal region