【摘要】 多层次CAD开发平台模型具有良好的开放性，直接面向分布式网络应用与CIMS集 成，可满足各层次的开发需求。该文介绍了以平台内核开发级、平台扩充级、应用开发级、 功能开发/扩充级、功能定制级5个级别构成的多层次开放式CAD开发平台模型，开发平台的 “软件总线-组件”体系结构和“集中管理，分散处理”思想，以及数据管理、用户界面管 理、命令管理与流程控制等开发平台核心技术。更多还原

【Abstract】 Multi-tiers CAD platform has good quality of opening, it orients to distributed Internet application and CIMS, and it can meet to requirements which come from many tiers. In this paper, the multi-tiers CAD platform model compose d of kernel tier, platform extension tier, application development tier, functio n development/extension tier is function customization tier is described. furth ermore, the architecture of "software bus & components", the basic thinking of " concentrated management, distributed processing", and some kernel techniques wit h the architecture, such as data management, user interface management, command management and flow control are discussed.更多还原