PDM系统持久状态管理分析,这是一个开发CORBA中间件方面的学术讨论报告，比较权威。是关于CORBA与数据库对接方面的文档。也是CORBA编程规范的剖析。-PDM system lasting state of management analysis, which is a development of the CORBA middleware academic discussions, authoritative. CORBA is on the docking with the datab