摘要： With the concepts of the authorization model of OODM,this paper proposes the deducing implicit authorizationg model in relational database management system(RDBMS).This model helps the user gain implicit authorization by deducing the explicit autohorizati

关键词: 数据库系统 隐式授权动态推导模型 数据库授权系统 信息管理系统