Action description language C is more expressive than ADL in many ways; for instance, it addresses the ramification problem. On the other hand, ADL is based on first-order logic, while C is only propositional; expressions with variables, which are frequently used when action domains are described in C , are merely schemas describing finite sets of causal laws that are formed according to the same pattern. In this paper we propose a new approach to the semantics of action descriptions with variables that combines attractive features of ADL and C .

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In Proceedings of National Conference on Artificial Intelligence (AAAI), pp. 1025-1030 2007.

@inproceedings{lif07, title={The Semantics of Variables in Action Descriptions}, author={Vladimir Lifschitz and Wanwan Ren}, booktitle={Proceedings of National Conference on Artificial Intelligence (AAAI)}, pages={1025-1030}, url="http://www.cs.utexas.edu/users/ai-lab/?lif07", year={2007} }