关系-对象型数据结构 object relational data structure
论文在自主开发的空间数据库VISTA的基础上针对特定的对象-关系型数据结构，提出了相应的访问控制方法。
This paper describes the access control method for the specific relational-object data structure on the base of the self-developed spatial database, VISTA.
运用关系型CAD 系统数据结构的独特性，构造面向对象的视图模型。
Obuect-oriented view-model is constructed in this paper by use of special data structure of relational CAD system.
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