DM异构数据源集成系统中的数据模型及查询语言

DATA MODEL AND QUERY LANGUAGE OF THE DM HETEROGENEOUS DATA INTEGRATION SYSTEM

在很多的实际应用中需要集成地访问异构的数据源 ,而异构数据源的数据结构模式未知且不固定 .为此 ,为了解决上述问题我们在 DM异构数据源集成系统中设计了一种针对半结构化数据的自描述的数据模型 SSDM(Semi Structured Data Model) ,并在此基础上构造了查询语言 SDQL(Semi Structured Data Query L anguage)和针对不同数据源的捆绑器 ,从而很好地解决了这个问题 .

Many applications require integrated access to heterogeneous information stored at sources with different data models and access mechanisms. We describe in this paper a semistructured data model which we called SSDM and a query language SDQL designed in the DM heterogeneous data integration system.