X.500 is an open, distributed, online directory service which is intended to be global in scope. X.500 is a support service for data exchange which includes providing directory support for data communication services specified by other OSI application standards. The X.500 series of standards covers services available to users, the functional model and protocols connecting the component parts of the directory, an information framework and a schema of the information held by the directory, and a mechanism for allowing OSI components to authenticate each other.
X.500是一个开放的、分布式的、趋向于全球化的在线目录服务。X.500支持数据交换服务，该服务符合OSI模型和其他应用协议下的数据传送的目录服务。X.500这一系列标准涵盖了可用的用户服务、连接各组成部分的功能和协议模型、目录的消息框架和信息保持、OSI模型中各组成部分彼此授权的支持等多个方面。 |
