Web Services 是基于 Internet 进行分布式计算的基本元素,面向 Service 的计算将成为未来计算技术发展的趋势。但如何能够自动发现需要的 Service 资源,提高 Web Services 组合的智能化程度,是近来的研究热点之一。IRS-Ⅱ首先提出基于任务本体的 Service 发布、发现和组合方法,可以说是将 Service 发现和组合从语法的层次提升到了语义的层次。本文首先深入分析了IRS-Ⅱ提出的方法及其体系结构,然后对 Web Services 的智能检索和服务组合的问题进行讨论。
There are several purposes for modeling and analyzing the problem domain before starting the software requirements analysis. First, it focuses on the problem domain, so that the domain users could be involved easily. Secondly, a comprehensive description on the problem domain will advantage getting a comprehensive software requirements model. This paper proposes an ontology-based approach for mod- eling the problem domain. It interacts with the domain users by using terminology that they can under- stand and guides them to provide the relevant information. A multiple paradigm analysis approach, with the basis of the description on the problem domain, has also been presented. Three criteria, i.e. the ra- tionality of organization structure, the achievability of organization goals, and the feasibility of organiza- tion process, have been proposed. The results of the analysis could be used as feedbacks for guiding the domain users to provide further information on the problem domain. And those models on the problem domain could be a kind of document for the pre-requirements analysis phase. They also will be the basis for further software requirements modeling.
