对于模块开发人员来说，理解核心主题代码如何搜索适当的主题方法是很重要的。
Understanding how the core theme code searches for the appropriate theme method is important for module developers.
使用显式主题方法可以传入任何用户的主题，并确定他们是否具有执行某项操作的权限。
The explicit subject method enables you to pass in the subject of any user and determine if they are authorized to perform an action.
介绍了检索语言，分析了检索语言在图书馆和检索系统中的应用，论述了分类和主题方法。
This paper introduces the retrieval language, analyzes on the application of the retrieval language in library and retrieval system, and discusses on the methods for the classification and subject.
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