Specification of Language (graphic,such as UMI A specia/technique for specification of graphic languages if the language has a graphic syntax,it is important to define the syntax in a notation independent way firstly,to define the abstract syntax of the language - UML使用元模型给出抽象语法 ▣ secondly,to define concrete syntax by mapping the notation onto the abstract synfax -给出具体的Notation,可以是图形化的也可以是文本 thirdly,to describe its semantics 一UML中的语义是使用自然语言给出的 -UML中constructs的静态语义和动态语义是同时给出的 Tian Zhang Nanjing University 10Tian Zhang @ Nanjing University 10 Specification of Language (graphic, such as UML) „ A special technique for specification of graphic languages ‰ if the language has a graphic syntax, it is important to define the syntax in a notation independent way ‰ firstly, to define the abstract syntax of the language – UML使用元模型给出抽象语法 ‰ secondly, to define concrete syntax by mapping the notation onto the abstract syntax – 给出具体的Notation，可以是图形化的也可以是文本 ‰ thirdly, to describe its semantics – UML中的语义是使用自然语言给出的 – UML中constructs的静态语义和动态语义是同时给出的