1 files changed, 12 insertions, 5 deletions
diff --git a/Data/GraphQL/AST/Core.hs b/Data/GraphQL/AST/Core.hs
index 2ca3928..f0c617c 100644
--- a/Data/GraphQL/AST/Core.hs
+++ b/Data/GraphQL/AST/Core.hs
@@ -3,29 +3,36 @@ module Data.GraphQL.AST.Core where
 
 import Data.Int (Int32)
 import Data.List.NonEmpty (NonEmpty)
+import Data.String
 
 import Data.Text (Text)
 
-newtype Name = Name Text deriving (Eq,Show)
+type Name = Text
 
-newtype Document = Document (NonEmpty Operation) deriving (Eq,Show)
+type Document = NonEmpty Operation
 
-data Operation = Query (NonEmpty Field)
+data Operation = Query    (NonEmpty Field)
                | Mutation (NonEmpty Field)
                  deriving (Eq,Show)
 
-data Field = Field Name [Argument] [Field] deriving (Eq,Show)
+data Field = Field (Maybe Alias) Name [Argument] [Field] deriving (Eq,Show)
+
+type Alias = Name
 
 data Argument = Argument Name Value deriving (Eq,Show)
 
 data Value = ValueInt Int32
            -- GraphQL Float is double precision
            | ValueFloat Double
-           | ValueBoolean Bool
            | ValueString Text
+           | ValueBoolean Bool
+           | ValueNull
            | ValueEnum Name
            | ValueList [Value]
            | ValueObject [ObjectField]
              deriving (Eq,Show)
 
+instance IsString Value where
+  fromString = ValueString . fromString
+
 data ObjectField = ObjectField Name Value deriving (Eq,Show)