Abstract: As a technology for software reuse, component technology aims at these challenges. Component-based composition tool is used for software reuse, and makes user to develop application more easily. Composition tool is based on some kinds of component model. Now, there are two kinds of commerce component model. One is COM, which belongs to Microsoft and based on OLE. Another is Ejb/JavaBeans, which belongs to Sun. Composition tool is used for software reuse, so when designing a composition tool, the first thing which should be thought about is how to make software reuse more easily. This paper analyzes the JavaBeans, gets the features related to software reuse, extends the model, and makes it more easily for reuse. The ability of self-description is extended.

Key words: Component, Component model, Component-based composition tool, Self-description

摘要： 软件构件技术作为一种软件复用技术，旨在解决软件系统开发所面临的困境。大多数构件组装工具都是基于某种特定的构件模型，选取JavaBeans 构件模型作为研究对象，分析了其与软件复用相关的特征，探讨了其对软件复用的支持程度，并对其中的一些特征进行了扩展。

关键词: 构件, 构件模型, 构件组装工具, 自描述

CLC Number: 

• TP311