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在深入剖析ANSI/X3/sPARC体系和Paolo Paolini一般结构的利弊之后
本文提出抽象操作的概念
把各具体数据模型统一在“内模式—概念模式—抽象操作”的结构上。
The latest international research trend in DBMS is to go beyond specific data models toward the common DB system construction. After a detailed analysis of ANSI/SPARC and Paolo Paolini’s general structures
this paper introduces the concept of abstract operation
under which a variety of specific data models can be unified on the "internal schema-conceptual schema-abstract operation" structure.
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