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。
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.
在多库系统中，对全局视图的存取操作要分解为针对多个LDB的子操作，可能还要对数据模式及查询语言进行转换。
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.
提出了一种多数据库系统的模式映射方法，并对水平映射、垂直映射、混合映射、相关映射和局部映射给出了一种统一的形式化描述。
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.
提出了一种多数据库系统的模式映射方法，并对水平映射、垂直映射、混合映射、相关映射和局部映射给出了一种统一的形式化描述。
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