Framing events relationally (or "framing relationally" or "relational framing") refers to a specific type of arbitrarily applicable relational responding that has the defining features in some contexts of mutual entailment, combinatorial entailment, and the transformation of stimulus functions. Framing events relationally is due to a history of relational responding relevant to the contextual cues involved; and is not solely based on direct non-relational training with regard to the particular stimuli of interest, nor solely to nonarbitrary characteristics of either the stimuli or the relation between them. The action of framing events relationally is often referred to in the noun form of "relational frame." Various families of relational frames, or ways of framing events relationally, have been identified.