Interoperability of Software Components

我们开发了一种可扩展的构件描述语言--SCL(软件规范和商务语言)。SCL既能描述接口规范，又能描述商务信息。对于接口规范，SCL可以描述基于CORBAIDL的接口签名以及。通过契约实现接口语义，通过设计模式实现接口上下文。SCL是基于HTML/XML的，因此它可以在Web上呈现信息。用类图描述了组件接口的静态结构，用时序图描述了组件的动态行为，提出了一个软件商务代理SCB(Software Commerce Broker)来收集、表示和检索用SCL描述的组件信息，并开发了SCB的原型系统。我们收集了约1,6000个组成部分的信息，并对SCL和SCB的有效性进行了评估。

We developed an extensible component description language named SCL(Software specification and Commerce Language). SCL can describe both interface specification and commerce information. For interface specification, SCL can describe the interface signature based on CORBA IDL as well as. interface semantics by contract and interface context by means of Design Patterns. SCL is based on HTML/XML so that it can present the information on the Web. Semantics of the component interface is described by a static structure around the component with a class diagram and by the dynamic behavior with a sequence diagram.We also proposed a SCB(Software Commerce Broker) to collect, present, and retrieve components information described with SCL, and developed a prototype of the SCL.Among the functions provided in the SCB, SCL editor helps the users to describe the components interface and an internet agent can collect the component information from the Web sites around the world. We collected some 1,6000 components information and evaluated the effectiveness of the SCL and SCB.