Based On Web Services Data Retrieval System - Mqsws Design

Metadata, one of technologic methods to organize data, describes the description of resource. Through the organization of metadata, it's easy to achieve the digital information's structural storage, orderly organization and effective query. Many systems, which support metadata, are able to share resource in machine understandable way. Web services is a system architecture method, which is suitable to resolve the mutual operation of different systems in the Internet. This paper focuses on:(1) the mapping of different metadata sets, finding the relation of two metadata if their different owner_sets are described with RDF Schema;(2) the mapping of one metadata query statement onto several other metadata query statements in order to make several data providers work synchronously;(3) introducing the principle of Web services architecture, discussing why it is the best mode to integrate different systems.And then put forward a metadata query system, which based on Web services, integrated many different resource. This system integrates flexible setting of query conditions, exact metadata query method and portable mode of different systems' conformity to improve the veracity and integrality of information query.