enabled emptyRP in Scandinavian by distinguishing between RNom and RAcc ; this also made it possible to use der as the Danish RNom form

lib/src/translator/TranslateSwe.gf

@@ -21,6 +21,7 @@ concrete TranslateSwe of Translate =
     ], 
   RelativeSwe - [
     RelSlash  -- replaced by RelSlash | PiedPipingRelSlash
+   ,IdRP  -- replaced by IdRP | emptyRP
     ],
   IdiomSwe,
   ConstructionSwe,
@@ -49,6 +50,8 @@ lin
    | {s = \\n,d,c => np.s ! NPPoss (gennum (ngen2gen cn.g) n) Nom ++ cn.s ! n ! DDef Indef ! c ; g = cn.g ; isMod = True} ---- overgenerating
    ;
 
+  IdRP = G.IdRP | E.emptyRP ;
+
   RelSlash rp cls = G.RelSlash rp cls | E.PiedPipingRelSlash rp cls ;
 
   QuestSlash ip cls = G.QuestSlash ip cls | E.PiedPipingQuestSlash ip cls ;