. . _:vb940881 . "Situazione" . _:vb940878 . . "A view, consistent with ('satisfying') a Description, on a set of entities. \nIt can also be seen as a 'relational context' created by an observer on the basis of a 'frame' (i.e. a Description). \nFor example, a PlanExecution is a context including some actions executed by agents according to certain parameters and expected tasks to be achieved from a Plan; a DiagnosedSituation is a context of observed entities that is interpreted on the basis of a Diagnosis, etc.\nSituation is also able to represent reified n-ary relations, where isSettingFor is the top-level relation for all binary projections of the n-ary relation. If used in a transformation pattern for n-ary relations, the designer should take care of creating only one subclass of Situation for each n-ary relation, otherwise the 'identification constraint' (Calvanese et al., IJCAI 2001) could be violated."^^ . . _:vb940872 . _:vb940969 . _:vb940875 . . _:vb940986 . . . . . . . _:vb940990 . . . . _:vb940890 . _:vb940869 . . . . . . . . "Situation" . . . _:vb940884 . . _:vb940887 . _:vb941014 .