元模型驱动的产品生命周期管理系统的设计与实现

提出了采用统一数据模型作为集成方法，结合统一建模语言和可扩展标记语言等工业标准，建立了模型驱动体系结构下的产品生命周期管理应用系统开发模式。在产品统一数据模型中引入元模型，为数据建模提供了语义定义和约束表达。在语法上，统一数据模型的建立采用了标准的统一建模语言；在实现上，产品数据建模过程集成了图形化建模环境。通过文档类型定义和可扩展标记语言的生成规则定义，完成了元模型的解析和利用，并把元模型转换成可扩展标记语言文件。结合产品生命周期管理系统的实现平台，给出了元模型到公用对象请求代理体系结构一接口定义语言的映射规则，讨论了可扩展标记语言表达的元模型到公用对象请求代理体系结构开发平台的转换。最后，介绍了元模型驱动方法在产品生命周期管理项目中的应用和进展情况。

Design & implementation of PLM based on meta-model driven

By applying industrial standards such as Unified Modeling Language (UML) and eXtensible Markup Language (XML), Model-Driven Architecture (MDA) was established for development of Product Lifecycle Management(PLM) system. Unified product meta model adopted UML as syntax expression. Meta model was Platform-Independent Model, which must be analyzed for application. With the help of stream-based model exchange format, UML was transferred to XML. In transforming process, Document Type Definition (DTD) for UML was defined, and Document Object Model (DOM) technology was adopted which generating XML. In development of PLM system, Platform-Independent Meta-Model should be transferred to Platform-Specific Model. PLM services were encapsulated in Common Object Request Broker Architecture (CORBA), so Interface Definition Language (IDL) should be generated from meta model. In the generating process of IDL, the mapping rules between IDL and meta model in UML were defined. The transformation from XML-based meta model to CORBA platform was discussed. Finally, the applications of meta model driven method in PLM projects were recommended.