Paradigm functions are ordinarily defined in terms of morpholexical functions. For any position "n" in the sequence of rules by which a word's inflections are spelled out and any complete and fully specified set [σ] of morphosyntactic features appropriate to that word's category, there is a morpholexical function MLF"n",[σ] that determines which rule (if any) applies at position "n" to realize [σ]. Given the definition of the morpholexical rules and rules of referral associated with position "n", the value of MLF "n",[σ] for a given argument follows from two general priciples: the Maximal Subset Override (14; [Stump, G. T., 1992, On the theoretical status of position class restrictions on inflectional affixes, Dordrecht: Kluwer, p. 215, 1993a, Position classes and morphological theory, Dordrecht: Kluwer]) and the Identity Function Default (15; [Stump, G. T., 1992, On the theoretical status of position class restrictions on inflectional affixes, Dordrecht: Kluwer, p. 216, 1993a, Position classes and morphological theory, Dordrecht: Kluwer]). [...] (15) Identity Function Default: MLF"n",[σ]("x")="x".
- Stump (2004), Pag. 104-105