The development of OCPL, object conceptual prototyping language

This paper describes the development of OCPL (object conceptual prototyping language), an object±knowledge representation language. The language is based on CPL, conceptual prototyping language, developed at the Free University of Amsterdam. CPL has been extended to allow for the explicit representation of object-oriented constructs. These constructs include facilities for application system de®nition, generation and usage. A restricted use of the constraint model of CPL allows for systematic representation of events from which appropriate user interfaces can be generated. The paper describes OCPL and its relationship to CPL and related work. It also illustrates how the constraint model can be used to represent dynamics and provide intelligent user support. q 2000 Elsevier Science B.V. All rights reserved.