权威控制或规范控制，是图书馆信息学中一个整理图书馆目录和目录信息的方式，使同一主题使用相同、唯一的标题。这些标题贯彻整个目录库并且能与其他交叉引用的数据库协同工作。每个标题简明扼要地其应用范围和用法，此组织形式方便了图书馆工作人员而且对研究者很友好。

分配给同一主题如作者、书籍、系列图书或合著图书一个独特唯一的标题，在与此相关的引用中都只使用此标题，就算作者拥有其他笔名或化名。例如，作家林良的笔名为子敏，又被称为小太阳，该馆就可订定一致的题名，当读者查检作者林良时，就可检索到所有林良的作品。作者记录可以合并到一个数据库中成为一个作者文档，维护更新这些文档以及其间的“逻辑关系”也是图书馆员及信息编录人员的工作。因此，规范控制是受控词表和目录控制的一个例子。

In library science, authority control is a process that organizes bibliographic information, for example in library catalogs by using a single, distinct spelling of a name (heading) or a numeric identifier for each topic. The word authority in authority control derives from the idea that the names of people, places, things, and concepts are authorized, i.e., they are established in one particular form. These one-of-a-kind headings or identifiers are applied consistently throughout catalogs which make use of the respective authority file, and are applied for other methods of organizing data such as linkages and cross references. Each controlled entry is described in an authority record in terms of its scope and usage, and this organization helps the library staff maintain the catalog and make it user-friendly for researchers.