FLORID - A Prototype for F-Logic (system description) by Paul-Th. Kandzia and Christian Schlepphorst Universität Freiburg, Germany Abstract Florid is a deductive object-oriented database system relying on F-logic, which as a distinctive feature provides rich modeling facilities. In this paper we first give an overview about the language and its implementation. Furthermore, some examples illustrate advanced data modelling, particularly the solution of some nonmonotonic problems using inheritance is pointed out.