论文标题
本体学介导的查询在有限的cliquewidth的数据库上
Ontology-Mediated Querying on Databases of Bounded Cliquewidth
论文作者
论文摘要
我们从参数化复杂性理论的角度研究了本体论介导的查询（OMQ）的评估。作为本体语言，我们考虑描述逻辑$ \ MATHCAL {ALC} $和$ \ MATHCAL {ALCI} $，以及一阶逻辑的受保护的两变量片段GF $ _2 $。查询是原子查询（AQS），结合查询（CQ）和CQ的工会。当参数是OMQ和CliqueWidth的大小时，所有研究的OMQ问题都是固定参数线性（FPL）。我们的主要贡献是对运行时间对参数的依赖性的详细分析，表现出几种有趣的效果。
We study the evaluation of ontology-mediated queries (OMQs) on databases of bounded cliquewidth from the viewpoint of parameterized complexity theory. As the ontology language, we consider the description logics $\mathcal{ALC}$ and $\mathcal{ALCI}$ as well as the guarded two-variable fragment GF$_2$ of first-order logic. Queries are atomic queries (AQs), conjunctive queries (CQs), and unions of CQs. All studied OMQ problems are fixed-parameter linear (FPL) when the parameter is the size of the OMQ plus the cliquewidth. Our main contribution is a detailed analysis of the dependence of the running time on the parameter, exhibiting several interesting effects.
