| 摘要: |
| 在面向对象的软件构造中，对象被视为软件系统的基本构件．本文提出对象规范描述语言ＯＤＬ（ｏｂｊｅｃｔｄｅｓｃｒｉｐｔｉｏｎｌａｎｇｕａｇｅ），并给出其主要结构的ＳＯＰ指称描述．ＳＯＰ演算的理论范集给出对象的形式描述．ＳＯＰ理论范集反映了对象的封装性，在这样的逻辑框架下，对象的属性（结构）和动作（行为）得以统一．对象聚合提供了由已有对象描述构造复杂对象描述的机制；而继承则可以扩充给定的对象描述并保持原描述的特性．此外，本文还区分了继承和子类这２个相似而又不尽相同的概念. |
| 关键词: 对象 指称语义 演算 对象语义描述 |
| DOI： |
| 分类号: |
| 基金项目:本文研究得到国家“八五”攻关项目基金、国家863高科技项目基金和国家自然科学基金资助. |
|
| OBJECT DESCRIPTION LANGUAGE AND ITS DENOTATIONAL SEMANTICS |
|
Huang Tao,Feng Yulin,Ni Bin,Li Jing
|
| Abstract: |
| Objects are considered as basic components of software system in object orie nted software construction.This paper presents an ODL(object description language)and the denotational semantics of its main constructs.The formal counterparts of objects are given by theory presentation in SOP calculus.Attributes(structure)and operations (behavior)are integrated in coherent logical units around which the notion of encapsula tion is formalized.Aggregation,inheritance etc.are formalized as specification constructs which allow people to assemble large specification from existed ones/extend agiven speci fication.Further,the notions of inheritance and subclass are clarified. |
| Key words: Object denotational semantics calculus object semantic description. |
