Index: EOAccess/EOAttribute.h
===================================================================
--- EOAccess/EOAttribute.h	(revision 40502)
+++ EOAccess/EOAttribute.h	(working copy)
@@ -194,6 +194,9 @@
 
 - (void)setPrototype: (EOAttribute *)prototype;
 
+- (void)setPrototype: (EOAttribute *)prototype
+    updatePropertyList: (NSDictionary *)propertyList;
+
 - (void)setReadOnly: (BOOL)yn;
 
 - (void)setColumnName: (NSString *)columnName;
Index: EOAccess/EOAttribute.m
===================================================================
--- EOAccess/EOAttribute.m	(revision 40502)
+++ EOAccess/EOAttribute.m	(working copy)
@@ -149,7 +149,7 @@
 	  EOAttribute *attr = [[_parent model] prototypeAttributeNamed: tmpString];
 
 	  if (attr)
-	    [self setPrototype: attr];
+	    [self setPrototype: attr updatePropertyList: propertyList];
 	}
 
       [self setExternalType: [propertyList objectForKey: @"externalType"]];
@@ -870,7 +870,8 @@
     }
 }
 
-- (void)setPrototype: (EOAttribute *)prototype 
+- (void)setPrototype: (EOAttribute *)prototype
+    updatePropertyList: (NSDictionary *)propertyList
 {
   if(_prototype != prototype
      && ![_prototypeName isEqualToString:[prototype name]])
@@ -883,7 +884,7 @@
 	  ASSIGN(_prototype,[[self _parentModel]prototypeAttributeNamed:_prototypeName]);
 	  if(_prototype == nil)
 	    ASSIGN(_prototype,prototype);
-	  [self _updateFromPrototype];
+	  [self _updateFromPrototype: propertyList];
 	}
       else
 	{
@@ -2284,6 +2285,21 @@
   _flags.protoOverride = protoOverride;
 }
 
+- (void) _updateFromPrototype:(NSDictionary *)propertyList
+{
+  int i=0;
+  // update propertyList
+  for(i = 0; i < EOATTRIBUTE_PROTO_OVERRIDE_BITS_COUNT; i++)
+    {
+      NSString* key = [GDL2_EOAttributeClass _keyForEnum:i];
+      if (![propertyList objectForKey:key] &&
+	  [_prototype valueForKey:key] != nil)
+	[propertyList setValue: [_prototype valueForKey:key]
+			forKey: key];
+    }
+
+}
+
 - (void) _setOverrideForKeyEnum: (EOAttributeProtoOverrideBits)keyEnum
 {
   _flags.protoOverride|= 1 << keyEnum;