DOIAbstract
A multi-theory framework is presented where both abduction and dynamic theory composition are modelled in a logic programming setting. In this framework the evolution of knowledge can be modelled by means of theory composition, while a form of hypothetical reasoning is supported by abduction. The semantics is expressed in terms of the standard semantics of logic programming (Herbrand models), by defining a compositional model-theory. A proof-theory is given in terms of inference rules, and soundness and completeness results are stated
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