A temporal object-oriented data model with multiple granularities

Author

Merlo, Isabella ; Bertino, Elisa ; Ferrari, Elena ; Guerrini, Giovanna

Author_Institution

Dipartimento di Inf. e Sci. dell-Inf., Genoa Univ., Italy

fYear

1999

fDate

1999

Firstpage

73

Lastpage

81

Abstract

We investigate some issues arising from the introduction of multiple temporal granularities in an object-oriented data model. Although issues concerning temporal granularities have been investigated in the context of temporal relational database systems, no comparable amount of work has been done in the context of object-oriented models. Moreover, the main drawback of the existing proposals is the lack of a formal basis-which we believe is essential to manage the inherent complexity of the object-oriented data model. We provide a complete temporal object-oriented type system supporting multiple temporal granularities and we formally define the set of legal values for our type system. We then address issues related to inheritance, type refinement and substitutability

Keywords

data models; database theory; inheritance; object-oriented databases; temporal databases; type theory; inheritance; multiple temporal granularities; substitutability; temporal database; temporal object-oriented data model; temporal object-oriented type system; type refinement; Data models; Database systems; Electronic switching systems; History; Law; Legal factors; Object oriented modeling; Proposals; Read only memory; Relational databases;

fLanguage

English

Publisher

ieee

Conference_Titel

Temporal Representation and Reasoning, 1999. TIME-99. Proceedings. Sixth International Workshop on

Conference_Location

Orlando, FL

Print_ISBN

0-7695-0173-7

Type

conf

DOI

10.1109/TIME.1999.777974

Filename

777974