  We present OntoScene, a framework aimed at understanding the semantics of
visual scenes starting from the semantics of their elements and the spatial
relations holding between them. OntoScene exploits ontologies for representing
knowledge and Prolog for specifying the interpretation rules that domain
experts may adopt, and for implementing the SceneInterpreter engine. Ontologies
allow the designer to formalize the domain in a reusable way, and make the
system modular and interoperable with existing multiagent systems, while Prolog
provides a solid basis to define complex rules of interpretation in a way that
can be affordable even for people with no background in Computational Logics.
The domain selected for experimenting OntoScene is that of prehistoric rock
art, which provides us with a fascinating and challenging testbed. Under
consideration in Theory and Practice of Logic Programming (TPLP)
