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Path query framework based on RDF (Resource Description Framework) graph data and relational data

A technology of relational data and graph data, applied in the field of path query framework based on RDF graph data and relational data, can solve problems such as unsatisfactory, and achieve the effect of expanding navigation query capabilities

Inactive Publication Date: 2017-08-11
TIANJIN UNIV
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Problems solved by technology

For those extended navigation query languages ​​based on SPARQL, they can only obtain the query results under normal circumstances, and they cannot satisfy the complex queries that combine RDF data and relational databases.

Method used

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  • Path query framework based on RDF (Resource Description Framework) graph data and relational data
  • Path query framework based on RDF (Resource Description Framework) graph data and relational data
  • Path query framework based on RDF (Resource Description Framework) graph data and relational data

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] A path query framework based on RDF graph data and relational data, comprising the following steps:

[0027] Step 1: Design queries about RDF data according to the syntax of the language, such as figure 1 shown;

[0028] Step 2: use existing RDF data processing tools, such as "rdf2rdf.jar" in Java, to process the existing RDF data into standard RDF format or NT format in the form of triples;

[0029] Step 3: Query on the RDF data and save the query result;

[0030] Step 4: Import the existing relational data into a relational database, such as MySQL;

[0031] Step 5: Query on the relational database and save the query result;

[0032] Step 6: Connect the two parts of the query results to find out the result that conforms to the grammatic...

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Abstract

The invention discloses a path query framework based on RDF (Resource Description Framework) graph data and relational data. RDF data related to the grammar design of the language is queried; an existing RDF data processing tool is used, existing RDF data is processed into a standard RDF format or an NT (New Technology) format of a triple form; query is carried out on the RDF data, and a query result is stored; existing relational data is imported into a relational database; query is carried out on the relational database, and a query result is stored; and two parts of query results are connected, and a result which conforms to a grammar rule is found. By use of the path query framework, query which can not be expressed by parts of traditional navigation languages based on SPARQL (SPARQL Protocol and RDF Query Language) expansion is solved, and the navigation query capability of the SPARQL is expanded from a perspective of heterogeneous data.

Description

technical field [0001] The invention relates to the technical field of heterogeneous data and path query, in particular to a path query framework based on RDF graph data and relational data. Background technique [0002] With the continuous advancement of Linked Data, Resource Description Framework (RDF), as a standard model for data exchange on the Semantic Web, is rapidly growing in data volume. The so-called Resource Description Framework, or RDF, is a language specially used to express information about resources on the World Wide Web, and is mostly used to express metadata about Web resources, such as the title of a Web page, author and modification time etc. And, after generalizing the concept of "Web resource", RDF can be used to express information about anything that can be identified on the Web. RDF datasets consist of a finite number of triples, and each triple represents a declarative sentence consisting of a subject (S), a predicate (P) and an object (0). To ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/242G06F16/2448G06F16/24534G06F16/284
Inventor 张小旺冯志勇张嘉慧
Owner TIANJIN UNIV
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