论文标题
使用通用模型的证据来解释本体论介导的查询答案（技术报告）
Explaining Ontology-Mediated Query Answers using Proofs over Universal Models (Technical Report)
论文作者
论文摘要
在本体介导的查询答案中，对不完整数据源的访问是由本体构成的概念层介导的，该概念层可以在描述逻辑（DL）或使用存在规则中构成。在文献中，存在许多将本体论知识纳入查询的复杂技术。但是，这些方法中很少有用于查询答案的解释性。我们通过根据通用模型的概念将现有的证明框架调整为结合查询答案来应对这一挑战。我们研究了确定在给定质量阈值下方证明的存在的数据和复杂性，可以以不同的方式进行测量。通过区分各种参数，例如查询的形状，我们获得了几个HORN DLS的复杂性的概述。
In ontology-mediated query answering, access to incomplete data sources is mediated by a conceptual layer constituted by an ontology, which can be formulated in a description logic (DL) or using existential rules. In the literature, there exists a multitude of complex techniques for incorporating ontological knowledge into queries. However, few of these approaches were designed for explainability of the query answers. We tackle this challenge by adapting an existing proof framework toward conjunctive query answering, based on the notion of universal models. We investigate the data and combined complexity of determining the existence of a proof below a given quality threshold, which can be measured in different ways. By distinguishing various parameters such as the shape of the query, we obtain an overview of the complexity of this problem for several Horn DLs.
