user defined library的意思|示意

This namespace declaration is required for any application that USES the library since the user-defined function has to be in a certain namespace.

任何使用该库的应用程序都需要这个名称空间声明，因为用户定义的函数必须存在某个名称空间中。

Defaults to 20 if not explicitly defined by the user before inclusion of the first library header.

如果在首次包含本库头文件之前用户未显式定义该宏，则缺省为20。

WebSphere Portal Server allows developers to implement and provide a user-defined customized tag library.

WebSphere Portal Server允许开发者实现和提供用户定义的定制标记库。

Thus in the process of constructing digital library, it is necessary to give them user-defined metadata standard.

因而在数字图书馆建设过程中，有必要对其自定义元数据标准。

Designing the database-access component in user-defined Tag Library to make it is easy to code and maintain program which need to access and operation database.

把其中的数据访问组件设计成自定义标签库，方便了访问数据库的代码编写和维护。