摘要： Pascal-AG描述了Pascal语言的语法和语义。这种描述比较抽象。该文从编译程序的标识符作用域概念引出Pascal-AG的环境属性概念。进而简要、直观地讨论了Pascal-AG block环境属性。

Abstract: PASCAL-AG describes the grammars and semantics of standard PASCAL, but it is quite abstract. The paper introduces PASCAL-AG environment attribute concept that is derived from identifier scope concept of compilers, furthermore, the environment attributes of block in PASCAL-AG is discussed.