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arXiv 1802.08586cs.DB
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数据库聚合

Database Aggregation

Francesco Belardinelli, Umberto Grandi

摘要:

知识可以以多种方式复杂地表示,从一组命题公式到Kripke模型,再到数据库。在本文中,我们研究了来自多个来源的信息的聚合,每个来源提交一个数据库建模为一阶关系结构。在存在的完整性约束,我们确定类的聚合器,尊重它在聚合数据库中,提供所有个人数据库满足it.We还将语言的一阶查询上的查询答案的聚合数据库上的聚合一致的答案,以查询每个单独的数据库上获得。这一贡献的目的是从理性选择理论的技术在数据库中的知识表示的应用的第一步。

英文摘要:

Knowledge can be represented compactly in a multitude ways, from a set of propositional formulas, to a Kripke model, to a database. In this paper we study the aggregation of information coming from multiple sources, each source submitting a database modelled as a first-order relational structure. In the presence of an integrity constraint, we identify classes of aggregators that respect it in the aggregated database, provided all individual databases satisfy it. We also characterise languages for first-order queries on which the answer to queries on the aggregated database coincides with the aggregation of the answers to the query obtained on each individual database. This contribution is meant to be a first step on the application of techniques from rational choice theory to knowledge representation in databases.

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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