9 citations · 22 across the 9 of their papers we have counts for
4 papers · 2 filters
Classes of Spatiotemporal Objects and Their Closure Properties
Jan Chomicki, Sofie Haesevoets, Bart Kuijpers +1
We present a data model for spatio-temporal databases. In this model spatio-temporal data is represented as a finite union of objects described by means of a spatial reference obje…
Minimal-Change Integrity Maintenance Using Tuple Deletions
Jan Chomicki, Jerzy Marcinkowski
We address the problem of minimal-change integrity maintenance in the context of integrity constraints in relational databases. We assume that integrity-restoration actions are lim…
Preference Queries
Jan Chomicki
The handling of user preferences is becoming an increasingly important issue in present-day information systems. Among others, preferences are used for information filtering and ex…
On the Computational Complexity of Consistent Query Answers
Jan Chomicki, Jerzy Marcinkowski
We consider here the problem of obtaining reliable, consistent information from inconsistent databases -- databases that do not have to satisfy given integrity constraints. We use…