时态实体-关系数据模型TER的研究

STUDIES ON TEMPORAL ENTITY RELATIONSHIP DATA MODEL

本文形式定义了一个通用时态数据模型，即时态实体－关系模型（ＴＥＲ模型）．在ＴＥＲ模型中，我们给出了类的一致性定义，特别是对关系类采用了有效的处理方法．此外。

We formally define a general temporal data model, that is, the temporal entity relationship model, shorten as TER model. In TER model, we give a consistent definition for various classes, and propose an effective method to deal with relation class. Moreover, we establish the corresponding algebraic system.