Migration of relation query based system to semantic web

被引：0

作者：

Chen Y.-X. ^{[1
]}

Yang X.-H. ^{[1
]}

Yin K.-T. ^{[1
]}

机构：

[1] College of Computer Science and Technology, Zhejiang University

来源：

Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2010年 / 44卷 / 09期

关键词：

Migration; Semantic Web; Simple protocol and RDF query language(SPARQL); Structured query language(SQL);

D O I：

10.3785/j.issn.1008-973X.2010.09.006

中图分类号：

学科分类号：

摘要：

Aimed at the problem of whether existing relational database management system(RDBMS) based applications can be integrated to semantic layer or not, the completeness of relation query to semantic query transforming was researched. Based on an Ontology auto learning approach from relational databases, several functions were abstracted to reflect the mappings between relation tables and Ontology classes, as well as relation attributes and Ontology properties. The basic SPARQL algebra expression for relation was established with those mapping functions. Then SPARQL algebras were used to simulate the five basic relational algebra operations: selection, projection, union, difference and Cartesian product, and five corresponding algorithms were proposed. The result showed that the SPARQL algebras can express the five basic relational algebras or the more complex relational algebra expressions composed by them under that ontology learning approach, so the SPARQL is relational completeness, and supports the system migration to semantic layer.

引用

页码：1666 / 1671+1710

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