关键词: C4ISR系统, 领域知识复用, 需求建模

Abstract: To elicit and reuse requirements of C4ISR system accurately，a multiple ontology framework for requirements elicitation and reuse is proposed.This paper presents the requirements modeling process under this framework.Firstly，a goal model is constructed，and then the goal in the model is used to search the domain knowledge base，if there has a matched goal in the knowledge base，the corresponding requirements about the goal can be extracted，otherwise，the concept description frameworks directed by top level ontology are used for user to present requirements.Finally，the eventually requirements model are the combination of the extracted requirements and the newly created requirements.This process can both reuse the requirements and direct user to present new requirements，so the quality of requirements model and the modeling efficiency can be guaranteed.

Key words: C4ISR system, domain knowledge reusing, requirements modeling