In many grammars, the term "prepositional case" is to refer to case marking that only occurs in
combination with prepositions. Normally, this is an oblique case, e.g., the Russian 6th case,
also referred to as "locative". (Ch. Chiarcos)
owl:versionInfo
Prepositional case is an in EAGLES optional value of CaseFeature for Spanish pronouns and determiners.
(http://www.ilc.cnr.it/EAGLES96/annotate/node19.html#oav2v 15.11.06)