Research On Linked Data Storage In Relational Databases

With the wide use of the Semantic Web,people's desire to fully,fast,accurately store information on the Semantic Web is becoming stronger and stronger.As the extension of the current Web,the Semantic Web researches the addition semantics which can be read by machines in the World Wide Web,thus the machines can gain comprehensive and useful information automatically and accurately from the World Wide Web and fast process them.Linked data is a kind of way of publish data on the World Wide Web which put forward by Tim Berners-Lee,it is a way to achieve the Semantic Web,it uses the RDF data model,using the URI(Uniform Resource Identifier)named data entity,publish and arrange instance data and class data,which can be accessed through the HTTP protocol to reveal and get the data.Four basic principles of linked data are:Use URIs as names for things;Use HTTP URIs so that people can find them;When someone looks up a name,provide useful information;Include links to others URIs so that they can discover more things.Resource Description Framework RDF is a basic of the Semantic Web,as a common meta data model,makes the semantic retrieval in the semantic Web possible.In order to store the huge linked data more efficiently in the Semantic Web,this thesis forwards a strategy of linked data storage in relational databases.The core content of this article is:firstly,the thesis analyzes the strategy of linked data storage in relational databases now,and analyzes the semantic features of the linked data,gives formal structure of the linked data model and the relational databases schema,and then discuss the corresponding relationships between linked data model and relational model.Secondly,a set of changing rules are proposed according to the characteristics between them,and changing algorithms of classes,properties and other data are given.Finally,a system is developed based on these rules and algorithms,which can change linked data to relational database schema and store them.And according to the analysis of the experiment results,the feasibility and the superiority of the method are verified through experiments.