PANDA: An Extensible DBMS Supporting Object-Oriented Software
Techniques
Max Egenhofer and Andrew Frank Database Systems in Office, Engineering, and Science, Zurich, Switzerland,
T. Harder (ed.), Informatik Fachberichte, Vol. 204, Springer-Verlag, pp. 74-79, March 1989.
Abstract
The PANDA databases management system was designed for non-standard
applications which deal with spatial data. It supports an
object-oriented program design with modularization, encapsulation,
and reusability, and can be easily embedded into complex
applications, such as spatial information systems or cartographic
expert systems. It is presented how complex objects and their
operations are defined. A layered structure on top of the
programmer's interface provides object operations which include
potentially complex consistency constraints.
Max Egenhofer and 
Andrew Frank