Object histories as a foundation for an active OODB

Author

Van den Akker, Johan ; Siebes, Arno

Author_Institution

CWI, Amsterdam, Netherlands

fYear

1996

fDate

9-10 Sep 1996

Firstpage

2

Lastpage

8

Abstract

Several links exist between active and temporal databases. These are summarised by the observation that rules are triggered by a specified evolution of the database. We discuss the relation between active and temporal database using DEGAS, an object based active database programming language. To achieve full active database functionality, a DEGAS object records its complete history. Hence, all data needed for a temporal database supporting a single temporal dimension is provided. Furthermore, the semantics of the active behaviour of DEGAS are defined straightforwardly in terms of the object history. Finally we discuss the advantages and disadvantages of extending DEGAS with a second time dimension (to achieve full temporal functionality) from an active database perspective

Keywords

active databases; deductive databases; object-oriented databases; object-oriented languages; query languages; temporal databases; DEGAS; active OODB; active behaviour; active database perspective; full active database functionality; full temporal functionality; object based active database programming language; object histories; object history; temporal databases; temporal dimension; Computer languages; Data models; Event detection; History; Object oriented databases; Production; Spatial databases;

fLanguage

English

Publisher

ieee

Conference_Titel

Database and Expert Systems Applications, 1996. Proceedings., Seventh International Workshop on

Conference_Location

Zurich

Print_ISBN

0-8186-7662-0

Type

conf

DOI

10.1109/DEXA.1996.558263

Filename

558263