含有文字序逻辑程序的一种辩论语义

Argumentation Semantics for Logic Programs with Literal Priority

有序逻辑程序的语义研究是常识推理的重要研究内容。文中对 Dung的辩论框架进行了扩充 ,针对含有文字序的逻辑程序提出了一种优先辩论框架 ,加入了对文字之间优先序的处理 ,进而定义了相应的优先回答集语义和优先扩充语义。证明了文中的优先回答集是 Sakama回答集的特例 ,而优先扩充语义可以处理没有回答集的优先逻辑程序。

Prior logic programs (PLP) are important for reasoning w ith priorities in commonsence reasoning. A new kind of argumentation framework f or PLP with literal prior orders is introduced. The proposed framework incorpora tes the order processing between arguments and has new attack relations with lit eral orders. The argumentation semantics along with the framwork is compared wit h the prior answer set semantics. Since the answer sets for PLP donot always exi st, the argumentation semantics is more expressive for PLP.