THE LOGICAL DATA MODEL

被引：29
|
作者：
KUPER, GM
VARDI, MY
机构：
[1] IBM CORP,ALMADEN RES CTR,SAN JOSE,CA 95114
[2] IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598
来源：
ACM TRANSACTIONS ON DATABASE SYSTEMS | 1993年 / 18卷 / 03期
关键词：
LANGUAGES; THEORY; ALGEBRA; DATABASE SCHEMA; LOGIC; RELATIONAL DATABASE; TUPLE CALCULUS;
D O I：
10.1145/155271.155274
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
We propose an object-oriented data model that generalizes the relational, hierarchical, and network models. A database scheme in this model is a directed graph, whose leaves represent data and whose internal nodes represent connections among the data. Instances are constructed from objects, which have separate names and values. We define a logic for the model, and describe a nonprocedural query language that is based on the logic. We also describe an algebraic query language and show that it is equivalent to the logical language.
引用
收藏
页码：379 / 413
页数：35
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