Paradigm functions apply to the root of a paradigm to yield the various fully inflected words constituiting tha paradigm. The paradigm function PF[σ] thus applies to the root ‘x’ to yield that member of ‘x’’s paradigm whose inflection realize the complete and fully specified set [σ] of morphosyntactic features appropriate to the category of ‘x’ [...]. 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].
- Stump (2004), Pag. 104