<I-N-C-A> is the the core conceptual model of the I-X Technology for mixed initiative task orientated communication.
Tate, A. (2003) <I-N-C-A>: a Shared Model for Mixed-initiative Synthesis Tasks, Proceedings of the Workshop on Mixed-Initiative Intelligent Systems (MIIS) at the International Joint Conference on Artificial Intelligence (IJCAI-03), pp. 125-130, Acapulco, Mexico, August 2003. [PDF Format]