摘要
针对公司煤炭调度系统中总调度系统与下属分矿的子调度系统中存在异构数据源导致难以实现数据共享,设计了一个基于多本体的煤炭调度集成系统架构。重点研究了系统查询处理过程,首先根据全局本体到局部本体的映射,把针对全局本体的查询语句分解为对局部本体的子查询,再将子查询进一步重写为关系数据源的查询语句并给出了RDQL-to-SQL查询重写算法,最后把对关系数据源的SQL子查询结果进行集成返回给用户。
There are heterogeneous data sources between scheduling system of the company and sub-scheduling system of the mine, so it is difficult to share data. We design a coal scheduling integration system architecture that based on multi-body. It focuses on the query processing. Firstly, it decomposes the global ontology query to the local ontology sub-query according to the mapping between global ontology and local ontology. Then it rewrites the sub-query to the data sources query sentence and give the RDQL-to-SQL query rewriting algorithm. Finally, it integrates the data source query results and returns to the user.
出处
《世界科技研究与发展》
CSCD
2009年第2期245-246,238,共3页
World Sci-Tech R&D
关键词
多本体
集成系统
映射
查询重写
multi-ontology
integration system
mapping
query rewrite
