基于OWL本体论映射的数据库网格语义模式集成研究

本文提出了一种在数据库网格中OWL本体论映射机制如何用于基于语义的数据库模式集成。方法是首先把关系模式转化为RDF/OWL语义描述以完成局部映射,再通过把局部数据语义与全局共享本体建立联系来完成全局映射。本质是把异构数据库模式的语义通过本体显性地表达出来,并在语义Web层完成模式的集成。特点是实现了在统一的语义层次上进行共享与查询,同时采用了局部映射与全局映射松耦合的构架,其特有的分层结构使得在跨库/单库环境中进行语义查询变得更加灵活。

A Framework of Semantic Schema Integration Based on OWL Ontology Mapping in Dart Database Grid

Brings forward a framework on how to integrate database schemas using OWL ontology mapping which is based on semantic in Database Grid. The framework adopts a two-stages mapping method as following, the first step is to implement local mapping, or couverting relational schema to RDF/OWL semantic schema; the second step is to implement global mapping, or bridging relationship between local data semantic and global sharable ontology. Essen- tially, heterogeneous database schema is represented clearly through ontology and integrated on the semantic Web layer. At the same time, it implements sharing and query based on semantic layer and keep both local and global on- tology mapping loose coupling which makes semantic query more flexible between across-database and single database.