Proto-Finnic locative system

The reconstructed locative cases of Proto-Finnic can be classified according to a three-way contrast (to, in and from a state) in each of the two series of locative cases: inner "–s-" ("inside") and outer "–l-" ("outside", "upon", and other grammaticalized functions to denote "possessor", "instrument", etc.), to give the following system of six locative cases.
In the above, "A" stands for either "a" or "ä" depending on vowel harmony, and "V" for an epenthetic vowel. Note that "-nA" is reconstructible as the Proto-Finno-Ugric locative marker (the ancestor of the Finnic essive case), "-tA" the separative ("from") (ancestor of the partitive case), and "–n", "–s" or "–k" the lative ("to").
This system is probably a Finnic innovation, although the "–s" and "–l" cases have corresponding forms in some other Uralic languages (Sami and Volgaic; and Permian, respectively).