本建议|国际标准定义了许多对象类和名称形式，这些对象类和名称形式可能在目录的一系列应用程序中都很有用。对象类的定义包括列出与该类对象相关的许多属性类型。名称表单的定义包括命名它所应用的对象类，并列出用于为该类对象命名的属性。这些定义由负责目录信息管理的管理机构使用。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This Recommendation | International Standard defines a number of object classes and name forms which may be found useful across a range of applications of the Directory. The definition of an object class involves listing a number of attribute types which are relevant to objects of that class. The definition of a name form involves naming the object class to which it applies and listing the attributes to be used in forming names for objects of that class. These definitions are used by the administrative authority which is responsible for the management of the directory information.All current amendments available at time of purchase are included with the purchase of this document.