diff --git a/lib/resource/bulgarian/CatBul.gf b/lib/resource/bulgarian/CatBul.gf
index 6a3c51216..b9389ede1 100644
--- a/lib/resource/bulgarian/CatBul.gf
+++ b/lib/resource/bulgarian/CatBul.gf
@@ -19,7 +19,7 @@ concrete CatBul of Cat = CommonX ** open ResBul, Prelude in {
     QCl = {s : ResBul.Tense => Anteriority => Polarity => QForm => Str} ;
     IP = {s : Str ; gn : GenNum} ;
     IComp = {s : Str} ;    
-    IDet = {s : Gender => Str ; n : Number; det : Dt} ;
+    IDet = {s : Gender => Str ; n : Number; spec : Species} ;
 
 -- Verb
 
@@ -33,11 +33,11 @@ concrete CatBul of Cat = CommonX ** open ResBul, Prelude in {
 
 -- Noun
 
-    CN = {s : Number => Case => Dt => Str; g : Gender} ;
+    CN = {s : Number => Case => Species => Str; g : Gender} ;
     NP, Pron = {s : Case => Str ; a : Agr} ;
-    Det = {s : Gender => Str ; n : Number; det : Dt} ;
+    Det = {s : Gender => Str ; n : Number; spec : Species} ;
     Num = {s : Str; n : Number } ;
-    Quant = {s : AForm => Str; det : Dt} ;
+    Quant = {s : AForm => Str; spec : Species} ;
 
 -- Structural
 
diff --git a/lib/resource/bulgarian/MorphoBul.gf b/lib/resource/bulgarian/MorphoBul.gf
index b63458e4a..6f7770b44 100644
--- a/lib/resource/bulgarian/MorphoBul.gf
+++ b/lib/resource/bulgarian/MorphoBul.gf
@@ -15,20 +15,20 @@ resource MorphoBul = ResBul ** open Prelude, (Predef=Predef) in {
 oper
 --2 Determiners
 
-  mkDeterminerSg : Str -> Str -> Str -> {s : Gender => Str; n : Number; det : Dt} = \vseki,vsiaka,vsiako ->
-    {s = table Gender [vseki;vsiaka;vsiako]; n = Sg; det = NDet} ;
-  mkDeterminerPl : Str -> {s : Gender => Str ; n : Number; det : Dt} = \vsicki ->
-    {s = \\_ => vsicki; n = Sg; det = NDet} ;
+  mkDeterminerSg : Str -> Str -> Str -> {s : Gender => Str; n : Number; spec : Species} = \vseki,vsiaka,vsiako ->
+    {s = table Gender [vseki;vsiaka;vsiako]; n = Sg; spec = Indef} ;
+  mkDeterminerPl : Str -> {s : Gender => Str ; n : Number; spec : Species} = \vsicki ->
+    {s = \\_ => vsicki; n = Sg; spec = Indef} ;
 
-  mkQuant : Str -> Str -> Str -> Str -> {s : AForm => Str; det : Dt} = \tozi,tazi,towa,tezi -> {
+  mkQuant : Str -> Str -> Str -> Str -> {s : AForm => Str; spec : Species} = \tozi,tazi,towa,tezi -> {
     s = \\gn => case gn of {
                   ASg Masc _ => tozi ;
                   ASg Fem  _ => tazi ;
                   ASg Neut _ => towa ;
                   APl      _ => tezi ;
-                  AFullDet   => tozi
+                  AFullDef   => tozi
                 };
-    det = NDet
+    spec = Indef
     } ;
 
 }
\ No newline at end of file
diff --git a/lib/resource/bulgarian/NounBul.gf b/lib/resource/bulgarian/NounBul.gf
index 48aa7995d..2f348c69d 100644
--- a/lib/resource/bulgarian/NounBul.gf
+++ b/lib/resource/bulgarian/NounBul.gf
@@ -4,44 +4,44 @@ concrete NounBul of Noun = CatBul ** open ResBul, Prelude in {
 
   lin
     DetCN det cn = 
-      { s = \\c => det.s ! cn.g ++ cn.s ! det.n ! c ! det.det ; 
+      { s = \\c => det.s ! cn.g ++ cn.s ! det.n ! c ! det.spec ; 
         a = agrP3 (gennum cn.g det.n)
       } ;
     UsePron p = p ;
 
     DetSg quant ord = {
-      s = \\g => quant.s ! ASg g NDet ++ ord.s ; 
+      s = \\g => quant.s ! ASg g Indef ++ ord.s ; 
       n = Sg ;
-      det=quant.det
+      spec=quant.spec
       } ;
 
     DetPl quant num ord = {
       s = \\g => quant.s ! aformGenNum (gennum g num.n) ++ num.s ++ ord.s ; 
       n = num.n ;
-      det=quant.det
+      spec=quant.spec
       } ;
 
-    PossPron p = {s = \\aform => p.s ! Gen aform; det = NDet} ;
+    PossPron p = {s = \\aform => p.s ! Gen aform; spec = Indef} ;
 
     NoNum = {s = []; n = Pl } ;
     NoOrd = {s = []} ;
 
     DefArt = {
       s = \\_ => [] ; 
-      det = ResBul.Det
+      spec = ResBul.Def
       } ;
 
     IndefArt = {
       s = \\_ => [] ; 
-      det = ResBul.NDet
+      spec = ResBul.Indef
       } ;
 
-    MassDet = {s = \\_ => [] ; n = Sg ; det = NDet} ;
+    MassDet = {s = \\_ => [] ; n = Sg ; spec = Indef} ;
 
     UseN noun = {
       s = \\n,c,dt => let aform = case n of {
                                     Sg => case <noun.g,c,dt> of {
-                                            <Masc,Nom,Det> => AFullDet ;
+                                            <Masc,Nom,Def> => AFullDef ;
                                             _              => ASg noun.g dt
                                           } ;
                                     Pl => APl dt
diff --git a/lib/resource/bulgarian/ResBul.gf b/lib/resource/bulgarian/ResBul.gf
index fcefe1f89..138ce0bce 100644
--- a/lib/resource/bulgarian/ResBul.gf
+++ b/lib/resource/bulgarian/ResBul.gf
@@ -30,8 +30,8 @@ resource ResBul = ParamX ** open Prelude in {
   param
     Gender = Masc | Fem | Neut ;
     
-    Dt = NDet | Det ;
-
+    Species = Indef | Def ;
+ 
 -- The plural never makes a gender distinction.
 
 --2 For $Verb$
@@ -55,9 +55,9 @@ resource ResBul = ParamX ** open Prelude in {
 --2 For $Adjective$
 
     AForm = 
-       ASg Gender Dt
-     | APl Dt
-     | AFullDet
+       ASg Gender Species
+     | APl Species
+     | AFullDef
      ;
 
 --2 Transformations between parameter types
@@ -80,8 +80,8 @@ resource ResBul = ParamX ** open Prelude in {
 
     aformGenNum : GenNum -> AForm = \gn -> 
       case gn of {
-        GSg g  => ASg g NDet ;
-        GPl    => APl NDet
+        GSg g  => ASg g Indef ;
+        GPl    => APl Indef
       } ;
 
   oper
@@ -190,15 +190,15 @@ resource ResBul = ParamX ** open Prelude in {
     mkAdjective : (_,_,_,_,_,_,_,_,_ : Str) -> {s : AForm => Str} = 
       \dobyr,dobria,dobriat,dobra,dobrata,dobro,dobroto,dobri,dobrite -> {
       s = table {
-        ASg Masc NDet  => dobyr ;
-        ASg Masc Det   => dobria ;
-        AFullDet       => dobriat ;
-        ASg Fem  NDet  => dobra ;
-        ASg Fem  Det   => dobrata ;
-        ASg Neut NDet  => dobro ;
-        ASg Neut Det   => dobroto ;
+        ASg Masc Indef => dobyr ;
+        ASg Masc Def   => dobria ;
+        AFullDef       => dobriat ;
+        ASg Fem  Indef => dobra ;
+        ASg Fem  Def   => dobrata ;
+        ASg Neut Indef => dobro ;
+        ASg Neut Def   => dobroto ;
         APl NDet       => dobri ;
-        APl Det        => dobrite
+        APl Def        => dobrite
         }
       } ;