对象关系数据库到RDF(S)的映射方法  

Mapping Method from Object-relational Database to RDF(S)

作　　者：鲁佳文 严丽 LU Jia-wen;YAN Li(College of Computer Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]南京航空航天大学计算机科学与技术学院,南京211106

出　　处：《计算机科学》2021年第10期145-151,共7页Computer Science

基　　金：江苏省基础研究计划(BK20191274)。

摘　　要：随着智能信息技术的发展,知识图谱已被广泛应用于智能搜索等各个领域。知识图谱中的信息一般采取RDF(S)的数据模型来表示。知识图谱的构建需要从大量的数据源抽取信息,而数据库是不可忽视的重要数据源。近几年,对象关系数据库得到了广泛的应用,且其中存储着丰富的语义信息,而基于对象关系数据库自动构建RDF(S)的研究却较少。因此,文中给出了对象关系数据库与RDF(S)的形式化定义,根据形式化定义将对象关系数据库中的语义信息进行抽取,提出了构建RDF(S)数据的映射规则。该映射规则不仅考虑了数据库的面向对象的语义,还考虑了数据库的约束,可以充分抽取数据库中包含的语义信息。最后实现了一个名为ORDB2RDF的映射工具,验证了该映射规则的正确性与映射结果的语义完整性。With the development of intelligent information technology,knowledge graph has been widely used in intelligent search and other research area.The information in the knowledge map is generally represented by the data model of RDF(S).The construction of knowledge graph needs to extract information from different data sources and database is an important data source that cannot be ignored.Nowadays,object-relational databases are widely used and contain rich semantic information,but research on constructing RDF(S)from object-relational databases is few.This paper puts forward formal definitions of object-relational databases and RDF(S)data and proposes mapping rules for constructing RDF(S)data from object-relational databases.The mapping rules not only consider the object-oriented semantics of the database,but also consider constraints,which can fully extract semantic information contained in the database.Finally,a mapping tool named ORDB2RDF is implemented to verify the correctness of the mapping rules and the semantic integrity of the mapping results.

关 键 词：对象关系数据库 RDF(S) 知识抽取 POSTGRESQL 

分 类 号：TP311.131[自动化与计算机技术—计算机软件与理论]