Year: 1989
Type: conference-paper
Abstract: In this paper, we present a type model for object-oriented databases. Most object-oriented databases only provide users with flat objects whose structure is a record of other objects. In order to have a powerful expression power, an object-oriented database should not only provide objects but also complex values recursively built using the set, tuple and disjunctive constructors. Our type model presents two notions: that of classes whose instances are objects with identity and that of types whose instances are complex values. The two notions are mixed in that an object is modeled as a pair containing an identifier and a value, and a value is a complex structure which contains objects and values. We define in this context the notions of subtyping and provide a set inclusion semantics for subtyping.
DOI: 10.1145/73721.73756
Authors: C. Lécluse, P. Richard
Language: English
Subfield: Information Systems
Field: Computer Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2011573124