arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1104.1964cs.LO
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描述逻辑的互模拟

On Bisimulations for Description Logics

Ali Rezaei Divroodi, Linh Anh Nguyen

摘要:

我们研究互模拟有用的描述逻辑。所考虑的逻辑中最简单的是$\mathcal{ALC}_{reg}$(PDL的变体)。其他的扩展,逻辑与逆角色,名词,量化的数量限制,通用的角色,和/或概念构造器表示的局部自反性的角色。它们也允许角色公理。我们给出的结果不变性的概念,TBox和ABoxes,保持RBoxes和知识库,和Hennessy-Milner性质w.r.t.在所考虑的描述逻辑的互模拟。使用不变性的结果,我们比较所考虑的描述逻辑w.r.t.概念、TBox和ABoxes。我们关于分离描述逻辑的表达性的结果自然地扩展到当我们有扩展$\mathcal{ALC}$的$\mathcal{ALC}_{reg}$的任何子逻辑而不是$\mathcal{ALC}_{reg}$的情况。我们还提供了最大的自互模拟和商的解释w.r.t.的结果。这种等价关系。这些结果对于描述逻辑中的最小化解释和概念学习是有用的。为了处理最小化解释的情况下,所考虑的逻辑允许量化的数量限制和/或构造函数的局部自反性的作用,我们引入了一个新的概念,称为QS-解释,这是需要获得预期的结果。通过采用Hopcroft的自动机极小化算法和Paige-Tarjan算法,我们给出了计算有限解释最大自互模拟所对应的划分的有效算法。

英文摘要:

We study bisimulations for useful description logics. The simplest among the considered logics is $\mathcal{ALC}_{reg}$ (a variant of PDL). The others extend that logic with inverse roles, nominals, quantified number restrictions, the universal role, and/or the concept constructor for expressing the local reflexivity of a role. They also allow role axioms. We give results about invariance of concepts, TBoxes and ABoxes, preservation of RBoxes and knowledge bases, and the Hennessy-Milner property w.r.t. bisimulations in the considered description logics. Using the invariance results we compare the expressiveness of the considered description logics w.r.t. concepts, TBoxes and ABoxes. Our results about separating the expressiveness of description logics are naturally extended to the case when instead of $\mathcal{ALC}_{reg}$ we have any sublogic of $\mathcal{ALC}_{reg}$ that extends $\mathcal{ALC}$. We also provide results on the largest auto-bisimulations and quotient interpretations w.r.t. such equivalence relations. Such results are useful for minimizing interpretations and concept learning in description logics. To deal with minimizing interpretations for the case when the considered logic allows quantified number restrictions and/or the constructor for the local reflexivity of a role, we introduce a new notion called QS-interpretation, which is needed for obtaining expected results. By adapting Hopcroft's automaton minimization algorithm and the Paige-Tarjan algorithm, we give efficient algorithms for computing the partition corresponding to the largest auto-bisimulation of a finite interpretation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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