子模式仅仅是数据库中与一个特殊用户的需求相关的一部分的描述。

A subschema is a description of only that portion of the database pertinent to a particular user's needs.

youdao

整个软件源代码的抽象信息存入程序数据库中，相当于软件的概念模式，重用构件相当于子模式。

The abstract information of entire software code is stored in a program database that is the conceptual scheme of the entire software, whereas the reuse component is a subscheme.

youdao

IDMS用数据字典控制系统产品的存取，用子模式控制数据的存取，使数据库不被非法用户使用。

Under IDMS, the access to system products is controled by means of a data dictionary, and data access is controled by subscheme, so as to protect IDMS data base accessed from unauthorized users.

youdao