Department: Wang, Yisong Guizhou Univ, Dept Comp Sci, Guiyang 550003, Peoples R China. Wang, Yisong; You, Jia-Huai; Yuan, Li Yan Univ Alberta, Dept Comp Sci, Edmonton, AB T6G 2M7, Canada. Shen, Yi-Dong Chinese Acad Sci, Inst Software, State Key Lab Comp Sci, Beijing 100864, Peoples R China.
English Abstract: Description Logic Programs (dl-programs) proposed by Eiter et al. constitute an elegant yet powerful formalism for the integration of answer set programming with description logics, for the Semantic Web. In this paper, we generalize the notions of completion and loop formulas of logic programs to description logic programs and show that the answer sets of a dl-program can be precisely captured by the models of its completion and loop formulas. Furthermore, we propose a new, alternative semantics for dl-programs, called the canonical answer set semantics, which is defined by the models of completion that satisfy what are called canonical loop formulas. A desirable property of canonical answer sets is that they are free of circular justifications. Some properties of canonical answer sets are also explored.
Wang Yisong,You Jia-Huai,Yuan Li Yan,et al. loop formulas for description logic programs[C]. 见:26th International Conference on Logic Programming. Edinburgh, SCOTLAND. JUL 16-19,.