信息技术 开放系统互连 面向连接的表示协议:协议规范

[中文适用范围]： 取消并取代第一版（1988）。 规定从一个表示实体到对等表示实体传输数据和控制信息的过程；通过功能单元选择表示实体要使用的程序的方法；用于传输数据和控制信息的表示协议数据单元的结构和编码。 这些过程适用于支持 OSI 参考模型表示层并希望在 OSI 环境中互连的系统之间的通信实例。 还指定了实施这些程序的系统的一致性标准。 不包含可用于证明这种一致性的测试。 [外文原描述]： Cancels and replaces the first edition (1988). Specifies procedures for the transfer of data and control information from one presentation-entity to a peer presentation-entity; the means of selecting, by means of functional units, the procedures to be used by the presentation-entities; the structure and encoding of the presentation-protocol-data-units used for the transfer of data and control information. These procedures are applicable to instances of communication between systems which support the presentation layer of the OSI reference model and which wish to interconnect in an OSI environment. Also specifies conformance criteria for systems implementing these procedures. Not contains tests which can be used to demonstrate this conformance.