Maintenance of Binary Topological Constraints Through Active Databases.
Cláudia Bauzer Medeiros, Mariano A. Cilia · 1995
This paper presents a system developed at unicamp for automatically maintaining topological constraints in a geographic database. This system is based on extending to spatial data the notion of standard integrity maintenance through active databases. Topological relations, defined by the user, are transformed into spatial integrity constraints, which are stored in the database as production rules. These rules are used to maintain the corresponding set of topological relations, for all applications that use the database. This extends previous work on rules and gis by incorporating the rules into the dbms rather than having them handled by a separate module. Keywords: Active databases, topological relations, spatial integrity 1 Introduction Active databases are systems that respond to events generated internally or externally to the system itself without user intervention. The active dimension is supported by production rule mechanisms, provided by the database management system (dbms...