本建议|国际标准规定: a） 在应用服务对象（ASO）之间传输信息的程序；和 b） 表示A单元数据ACSE APDU的抽象和具体语法。 A单元数据程序的定义如下: a） 通过使用支持服务，对等ACSE协议机器之间的交互；和 b） ACSE协议机器、其服务提供者和服务用户之间的交互。 这些程序适用于希望以开放方式进行通信的系统之间的通信实例 无连接模式下的系统互连环境。 本建议|国际标准还规定了实施本标准的系统的一致性要求 程序它不包含可用于证明符合性的测试。

This Recommendation | International Standard specifies: a) procedures for the transfer of information among application-service-objects (ASOs); and b) the abstract and concrete syntax for the representation of the A-UNIT-DATA ACSE APDU. The A-UNIT-DATA procedure is defined in terms of: a) The interactions between peer ACSE protocol machines by the use of a supporting service; and b) the interaction between an ACSE protocol machine, its service-provider and its service-user. These procedures are applicable to instances of communication between systems which wish to communicate in an open systems interconnection environment in a connectionless mode. This Recommendation | International Standard also specifies conformance requirements for systems implementing this procedure. It does not contain tests which can be used to demonstrate conformance.