support for measurement units

src/abstract/Common.gf

@@ -44,4 +44,8 @@ abstract Common = {
     Pol ;   -- polarity                            e.g. positive, negative
     Ant ;   -- anteriority                         e.g. simultaneous, anterior
 
+--2 Measures
+
+    MU ;       -- unit of measurement              e.g. "km", "cm", "%"
+
 }

src/abstract/Noun.gf

@@ -156,4 +156,9 @@ abstract Noun = Cat ** {
     AdjDAP : DAP -> AP -> DAP ;    -- the large (one)
     DetDAP : Det -> DAP ;          -- this (or that) 
 
+--2 Quantities
+
+    QuantityNP : Digits -> MU -> NP ;
+    QuantityFloatNP : Digits -> Digits -> MU -> NP ;
+
 }