【摘要】 针对互操作所导致的异构系统间数据交换构造STEP模型映射算法,为基于不同STEP应用协议的CAx系统集成提出了一种方法论.首先对STEP/EXPRESS数据模型作出形式化定义,在此基础上提出了两种STEP模型映射技术——静态映射与动态映射,并阐述了基于EXPRESS-X的实现及其在开放式环境中的一种典型应用.提出了模型映射技术独立于具体系统,为异构系统提供透明的集成方式,从而降低了信息集成在系统开发中的开销.更多还原

【Abstract】 To achieve the data exchange between heterogeneous systems introduced by interoperability, the algorithms for model mapping in STEP are presented, which provide a methodology to the integration of CAx systems based on various application protocols of STEP. A formal definition of STEP/EXPRESS data model is introduced firstly. Based on this definition, two kinds of model mapping techniques for STEP, i.e. the static mapping and the dynamic mapping, along with the implementation by using EXPRESS-X mapping language are elaborated. Finally, a typical application of this technique in the open environment is addressed. Being independent of any specified system, the model mapping techniques presented in this paper achieve transparent integration between heterogeneous systems, which reduce the cost of information integration in system development.更多还原