关键词: 功能建模, 功能表示, 概念设计, 系统建模语言

Abstract: To support the function representation with rich semantic and rigorous syntax,a function modeling approach was proposed based on extension of System Modelling Language (SysML).A set of semantic meta-models were predefined to support the function description with detailed input/output flows' state information,thus the imprecise and ambiguity were avoided.The abstract and concrete syntax implementation of this modeling approach formalized the function representation and provided visualized notations.Moreover,with the consideration of the proper balance of flexibility and formalism,a Function Modeling Language (FML) was defined as a SysML profile for function representation in a formal way.Based on the syntax constraints and grammar rules,a plugin was developed in IBM Rhapsody which not only ensure the correctness of function model,but also facilitate designers to construct the function structure model.

Key words: function modeling, function representation, conceptual design, system modeling language