We consider fragments of the relational logic RL(1) obtained by posing various constraints on the relational terms involving the operator of composition of relations. These fragments allow to express several non classical logics including modal and description logics. We show how relational dual tableaux can be employed to provide decision procedures for each of them.

We present an OWL 2 ontology, called SaintGall, representing the Saint Gall plan, one of the most ancient documents arrived intact to us. The Saint Gall plan describes the ideal model of a Benedictine monastic complex that inspired the design of many European monasteries. The structural, functional, and architectural specification of an ideal Benedectine monastery is modeled by the SaintGall ontology, which allows one to analyse and model the Monastery architectural type. This work started with the purpose of relating Catania’s (...) San Nicolò l’Arena Benedectine Monastery with the abstract notion of Benedectine monastery, in the ambit of an ontological model based on the renovation works carried out by the architect Giancarlo De Carlo and developed by the same authors. The SaintGall ontology opens a research path aiming at comparing different monastic architectures that can be useful in any intervention of refurbishment or design for a monastery. (shrink)