The Encyclopedia of GIS features a comprehensive and authoritative treatment of
Geographic Information Science, with an AZ format providing easy access to the field …

A constraint can be thought of intuitively as a restriction on a space of possibilities.
Mathematical constraints are precisely specifiable relations among several unknowns (or …

" Constraints, such as linear or polynomial equalities, are used to finitely represent possibly
infinite sets of points. They provide an elegant way to combine classical relational data with …

Introduced forty years ago, relational databases proved unusually successful and durable.
However, relational database systems were not designed for modern applications and …

Intelligent Database Systems Page 1 IIWAS 2001 - Linz, Austria Pag. 1 Barbara Catania
Intelligent Database Systems Barbara Catania University of Genova (Italy) IIWAS 2001 - Linz …

The expressive power of first-order query languages with several classes of equality and
inequality constraints is studied in this paper. We settle the conjecture that recursive queries …

Constraint databases generalize relational databases by finitely representable infinite
relations. This paper surveys the state of the art in constraint databases: known results …

In previous work we have developed the scheme of indefinite L-constraint databases where
L, the parameter, is a first-order constraint language. This scheme extends the constraint …

We propose constraint databases as an intermediate level facilitating the interoperability of
spatiotemporal data models. Constraint query languages are used to express translations …

A general linear spatial database model is presented in which both the representation and
the manipulation of non-spatial data is based on first-order logic over the real numbers with …