2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/31238We show how definite extended logic programs can be used for defining and reasoning with rough sets. Moreover, a rough-set-specific query language is presented and an answering algorithm is outlined. Thus, we not only show a possible application of a paraconsistent logic to the field of rough sets as we also establish a link between rough set theory and logic programming, making possible transfer of expertise between both fields.10 pages. Originally published in proc. PCL 2002, a FLoC workshop; eds. Hendrik Decker, Dina Goldin, Jorgen Villadsen, Toshiharu Waragai (http://floc02.diku.dk/PCL/)Logic in Computer ScienceProgramming LanguagesF.4.1; I.2.3; I.2.4; D.1.6text