diff --git a/Models.hs b/Models.hs
index 633f6d661..b41a71fb3 100644
--- a/Models.hs
+++ b/Models.hs
@@ -1,5 +1,5 @@
 
-module Models  -- data types & behaviours
+module Models -- data types & behaviours
 where
 
 import Text.Printf
@@ -12,7 +12,7 @@ data Ledger = Ledger {
                       periodic_entries :: [PeriodicEntry],
                       entries :: [Entry]
                      } deriving (Eq)
-data ModifierEntry = ModifierEntry { -- aka automated entry
+data ModifierEntry = ModifierEntry { -- aka "automated entry"
                     valueexpr :: String,
                     m_transactions :: [Transaction]
                    } deriving (Eq)
@@ -22,7 +22,7 @@ data PeriodicEntry = PeriodicEntry {
                    } deriving (Eq)
 data Entry = Entry {
                     date :: Date,
-                    status :: Bool,
+                    status :: Status,
                     code :: String,
                     description :: String,
                     transactions :: [Transaction]
@@ -36,6 +36,7 @@ data Amount = Amount {
                       quantity :: Double
                      } deriving (Eq)
 type Date = String
+type Status = Bool
 type Account = String
 
 -- Amount arithmetic - ignores currency conversion
diff --git a/hledger.hs b/hledger.hs
index b488ae7f9..4cff9fac1 100644
--- a/hledger.hs
+++ b/hledger.hs
@@ -3,7 +3,7 @@
 -- GPLv3, (c) Simon Michael & contributors, 
 -- John Wiegley's ledger is at http://newartisans.com/ledger.html .
 
-module Main -- almost all IO is handled here
+module Main -- application logic & most IO
 where
 
 import System