基于语义的元数据索引查询方法

针对现有元数据索引方法因其固有的缺陷而难以应用于复杂的语义网络，提出一种新的基于语义的元数 据索引查询方法。该方法以ＲＤＦ图为数据模型，在路径索引的基础上，为元数据建立索引，并通过路径表达式实现元数据的查询。它能有效的促进领域知识的共享和语义表达，提高元数据的检索效率和查准率，为用户和应用提供语义查询和信息汇集能力。

An Indexing and Querying Method for Semantic Metadata

The existing methods of index and query about metadata are difficult to the complicated semantic networks because of their inherent defects. So a new indexing and querying method for semantic metadata is proposed. Using RDF graph as data model, this method establishes indexing structure for metadata based on path index and realizes metadata search by means of path expressions. It also promotes efficiently the share of domain knowledge and semantic expression, increase retrieval efficiency and veracity, and provide the semantic query and assembling information capabilities for users and applications.