.decl mpn(part:symbol, mpn:symbol)
.output mpn

mpn(part, value) :-
    fact(part, "http://purl.org/ee/kicad-sch-custom-fact-type#mpn", value).

mpn(part, value) :-
    fact(part, "http://purl.org/ee/kicad-sch-custom-fact-type#MPN", value).