华东师范大学学报(自然科学版) ›› 2006, Vol. 2006 ›› Issue (5): 110-115.

• 计算机科学 • 上一篇    下一篇

BCDM中的时间标签规范及优化

王路帮   

  1. 浙江万里学院 信息管理系，浙江 宁波 315100
  • 收稿日期:2005-12-27 修回日期:2006-02-21 出版日期:2006-09-25 发布日期:2012-11-27

Standardization and Optimization of the Temporal Label in BCDM

WANG Lu-bang   

  1. Information Management Department，Wanli University, Ningbo Zhejiang 315100, China
  • Received:2005-12-27 Revised:2006-02-21 Online:2006-09-25 Published:2012-11-27

摘要： 对BCDM（the Bitemporal Concept Data Model ）模型中的时间标签进行处理，给出了一种规范的时间标签的记录形式，并对规范后的标签进行优化处理，以及对时态操作前的变元进行了消解.这种对时态标签的处理，减少了时间变元的记录，也给时态存储、时态索引和检索带来了优化.

关键词: BCDM, 双时态数据库, 时态标签 ,  ,

Abstract: This paper dealt with the temporal label in BCDM (the Bitemporal Concept Data Model), transformed the label into a new normal form, then the temporal variables were reduced even eliminated in the process of temporal optimization and temporal binding. The process of the temporal label optimizes the temporal storage and temporal searching.

Key words: BCDM, bitemporal database, temporal label  ,

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