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Flexible data service combined method based on semantic enquire overwrite

A data service and semantic query technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems that cannot satisfy users' flexible queries, and achieve the effects of improving flexibility, improving efficiency, and describing accurately

Inactive Publication Date: 2008-04-09
ZHEJIANG UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

At the same time, in order to meet the flexible and fine-grained query requirements, most of the currently used service composition technologies are based on workflow, so they cannot meet the flexible query requirements of users.

Method used

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  • Flexible data service combined method based on semantic enquire overwrite
  • Flexible data service combined method based on semantic enquire overwrite

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with accompanying drawing and embodiment:

[0034] The core idea of ​​the present invention is to define a unified and consistent domain ontology model for a data source containing heterogeneous and heterogeneous data resources, which is used to express the semantic information of the data source data. On this basis, the data provider provides data services to the outside world to release the data of this data source. We describe the content and capabilities of the data service through the description of the semantic ontology. When a user makes a query request, the query rewriter and DS executor provided by the system generate and execute a service sequence that can complete the user query request through the semantic definition of data service content and capabilities and the semantic description of the query request. By combining and executing this Service sequence to complete the user's query reques...

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Abstract

The invention relates to a method of flexible data service composition based on semantic query rewriting, which includes the steps as following: 1. model and issue a data body model of a data source; 2. construct and issue a data service model of the data source; 3.a user inputs a query request and the query request is transmitted to a query rewriter; 4. the query rewriter calls the matching algorithm based on DS of a graph model, and a candidate DS collection for accomplishing the query requirement is found; 5. call a DS composition actuator on the basis of the candidate DS; 6. the DS combination actuator calls the DS composition algorithm based on the query rewriting, and a DS sequence which can accomplish the query requirement and be combined is found; 7. actuate sequentially and combine data services and obtain the data collection which the user wants to query according to the DS sequence generated finally. The invention has the advantages that: 1. the flexibility of user query requests is enhanced; 2. the description of data source is more accurate and the more fine-grained query interface is provided; 3. the efficiency of service combination is improved.

Description

technical field [0001] The invention relates to the technical field of integration and combination of web-based data services, and mainly relates to a method for combining flexible data services based on semantic query rewriting. Background technique [0002] At present, most of the Internet data information is published through Web services. Traditional Web services provide information resources through fixed input and output interfaces, and often need to obtain the information that users want through service composition. the data you want. In this paper, we call this kind of web service that publishes and provides a large amount of data resources as data service, or DS for short. [0003] With the growth of data resources on the Internet at a geometric rate, this way of providing information resources through fixed input and output interfaces can no longer meet the application needs of users. For example, a web service can provide personal information such as: name, age,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 吴朝晖陈华钧周林华胡鑫
Owner ZHEJIANG UNIV
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