This paper gives an approach of schema mapping in multidatabase systems and USES a schema mapping tree to store and express these mappings.
本文给出了一种多数据库系统中的模式映射方法,并使用模式映射树来存储和表达这种模式映射。
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In multidatabase, access to global view will be decomposed to several sub-operations to several LDB, and perhaps also need data schema translation and query processing.
A method of schema mapping in multidatabase systems was introduced and an uniform formalized definition for horizontal, vertical, mixed, correlative and local mappings was given.