diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+0.4
+  - Optional flags for SRT added, this modify where the text is displayed
+  - Optional flags for SUB added.
+  - Test case for the two parser based on the examples and HUnit
 0.3
   - Show instances for SRT now are simpler and more related on how is defined
     the ADT. this is a PARSER not a prettyPrinter nor a valid .srt producer
diff --git a/Text/Subtitles/SRT/Datatypes.hs b/Text/Subtitles/SRT/Datatypes.hs
--- a/Text/Subtitles/SRT/Datatypes.hs
+++ b/Text/Subtitles/SRT/Datatypes.hs
@@ -17,13 +17,12 @@
 
   -- * Datatypes
   Subtitles,
-  Rectangle(..),
   Line(..),
   Range(..),
-  Time(..)
+  Time(..),
+  Rectangle(..)
   ) where
 
-import Data.List (intercalate)
 import Data.Text (Text, unpack)
 import Data.Attoparsec.Text (Parser)
 
@@ -47,11 +46,12 @@
 -- | The core of the parser. each one of the constructor representing one part
 -- of the Line
 data Line = Line
-  { index  :: Int
-  , range  :: Range
-  , geometry :: Maybe Rectangle 
-  , dialog   :: Text
+  { index  :: Int -- ^The absolute order of this line.
+  , range  :: Range -- ^The interval of time that the line is shown.
+  , geometry :: Maybe Rectangle  -- ^Sometimes text shouldn't be on the lower center.
+  , dialog   :: Text -- ^what to show in screen
   } deriving (Eq, Ord, Show)
 
+-- |A subtitle is just a List of independent Lines that appear on screen
 type Subtitles = [Line]
 
diff --git a/Text/Subtitles/SUB/Datatypes.hs b/Text/Subtitles/SUB/Datatypes.hs
--- a/Text/Subtitles/SUB/Datatypes.hs
+++ b/Text/Subtitles/SUB/Datatypes.hs
@@ -16,11 +16,11 @@
   module Data.Text,
   
   -- * Datatypes
-  Frame,
   Subtitles,
-  Color,
+  Line(..),
   TextProperty(..),
-  Line(..)
+  Frame,
+  Color
   ) where
 
 import Data.Text (Text)
diff --git a/subtitleParser.cabal b/subtitleParser.cabal
--- a/subtitleParser.cabal
+++ b/subtitleParser.cabal
@@ -1,5 +1,5 @@
 name:            subtitleParser
-version:         0.4
+version:         0.4.1
 license:         BSD3
 license-file:    LICENSE
 category:        Text, Parsing