该国际标准定义了编程语言APL和环境 其中执行APL程序。其目的是促进交流和促进 APL程序和编程技能的可移植性。本国际标准规定 APL程序的语法和语义以及环境的特点 执行哪些APL程序。 它还规定了符合本国际标准的要求，包括 发布实现属性的值和特征，以便符合 可以对实现进行有意义的比较。 本国际标准未规定: ？可能随特定设备而变化的实施属性或 使用的操作系统； ？实施限制的必需值，如APL工作区大小或数字 精度； ？用于表示APL对象的数据结构； ？通过共享变量可用的设施。

This International Standard defines the programming language APL and the environment in which APL programs are executed. Its purpose is to facilitate interchange and promote portability of APL programs and programming skills. This International Standard specifies the syntax and semantics of APL programs and the characteristics of the environment in which APL programs are executed. It also specifies requirements for conformance to this International Standard, including the publication of values and characteristics of implementation properties so that conforming implementations can be meaningfully compared. This International Standard does not specify: ? implementation properties that are likely to vary with the particular equipment or operating system used; ? required values for implementation limits such as APL workspace size or numeric precision; ? the data structures used to represent APL objects; ? the facilities available through shared variables.