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This paper describes the program of research and development of requirements engineering technologies ongoing at Rome Laboratory since the early 1980s. One research thrust i s based on a process model of requirements engineering and is implementing this model using conventional technologies. R&D activities have led to the enhancement of a requirements analysis tool and the development of two requirements validation tools based on rapid prototyping. Ongoing work is integrating these three tools into a requirements engineering workstation. Another research direction is taking advantage of artijicial intelligence work which is developing an alternative software development paradigm called the knowledge based sofhvare assistant. These efforts are described as well as their impact on future plans for evolutionary development of the workstation environment to incorporate these knowkdge-based approaches.

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