Longbow is a hierarchical discourse planning system that combines decompositional reasoning (planning to perform an abstract action by performing that action’s substeps) and causal reasoning (planning to perform an action by ensuring that the action’s preconditions all hold before its execution) in the same representation.
The Longbow system is based on a domain-independent hierarchical AI planning algorithm named DPOCL (Decompositional, Partial-Order Causal Link planner) which itself is built on top of a non-hierarchical planner, UCPOP. Longbow differs from DPOCL and UCPOP by containing extensions that make representing communicative actions possible.
Highlights of Longbow’s Feature List include:
Young, R. Michael, Martha E. Pollack and Johanna D. Moore, Decomposition and causality in partial-order planning, Intelligent Systems Program Technical Report 94-2, University of Pittsburgh, 1994.
Young, R. Michael. A Developer’s Guide to the Longbow Discourse Planning System, Intelligent Systems Program Technical Report 94-4, University of Pittsburgh, 1994. [PDF]
Young, R. Michael and Johanna D. Moore, (1994) Does Discourse Planning Require a Special-Purpose Planner? In the proceedings of the AAAI Workshop on Planning for Inter-Agent Communication, Seattle, WA, 83-90. [PDF]
Young, R. Michael and Johanna D. Moore, DPOCL: A principled approach to discourse planning, inProceedings of the Seventh International Workshop on Natural Language Generation, Kennebunkport, ME, pages 13-20, July, 1994. [PDF]
Young, R. Michael, Martha E. Pollack and Johanna D. Moore, Decomposition and causality in partial-order planning, in Proceedings of the Second International Conference on AI and Planning Systems, Chicago, IL, pages 188-193, July, 1994. [PDF]
Young, R. Michael, Johanna D. Moore and Martha E. Pollack, Towards a principled representation of discourse plans. In Proceedings of the Sixteenth Annual Meeting of the Cognitive Science Society, Atlanta, GA, pages 946-951, August, 1994. [PDF]
Please contact R. Michael Young (young at csc.ncsu.edu)
The US Office of Naval Research