A binary relation from an existing ontology or schema. The frame semantics assumption here is that each ontology property is a projection of an underlying multigrade predicate that corresponds to the conceptualization of the predicate. E.g. a 'part of' relation between body parts can be the binary projection of a Part-Whole frame specialized for organic body parts (notice that the multigrade predicate may also involve time, location, manner of being connected, functional dependencies, etc.).