diff --git a/Data/String/Interpolation.hs b/Data/String/Interpolation.hs
--- a/Data/String/Interpolation.hs
+++ b/Data/String/Interpolation.hs
@@ -1,5 +1,5 @@
 {-# LANGUAGE QuasiQuotes,TemplateHaskell,DeriveDataTypeable #-}
-module Data.String.Interpolation(str) where
+module Data.String.Interpolation(str,endline,tab) where
 import Language.Haskell.TH as TH
 import Language.Haskell.TH.Quote
 import Language.Haskell.Meta
@@ -8,12 +8,18 @@
 import Data.Char
 import Data.List(intercalate)
 
+
+
 quoteExprExp :: String -> TH.ExpQ
 -- | Quasiquote 'str' implements multiline strings with interpolation.
---   Interpolating a value of parameter a into the string is done by $a$
---   and interpolating anything with instance Show is $:a$.
+--   Interpolating a value into the string is done by 
+--   $\<String expression\>$
+--   and interpolating anything with instance Show is 
+--   $:\<Show expression\>$. Due to pretty deep limitations, the parser
+--   is not able to properly deduce associtivity of infix operators,
+--   so use lots and lots of parenthesis.
 --
---   Repetitive patterns can be made by # symbol using the following syntax: 
+--   Repetitive patterns can be made by # symbol: 
 --
 --  @
 --  \#\<var\> in \<list\>: \<interpolated string\> (|\<interpolated string\>)\#
@@ -22,24 +28,59 @@
 --   Where (|\<interpolated string\>) denotes optional separator for the 
 --   elements.
 --   
+--   Multiline indentation is handled by aligning on smallest un-empty
+--   line after the first. Neither pattern matching nor nested #-patterns
+--   are supported. Normal '\\n' style escaping of special characters
+--   is intentionally not supported. Please use $endline$ or $"\n"$ 
+--   style instead. (Also, in this beta release $,## and : symbols are
+--   not escaped in the interpolated expressions.
 --
---   Example:
--- 
+--   As an example, let's plot set of vectors with gnuplot:
+--    
 --   @
---    \#i in myList: this is $i$|--\#
+--   plotVecs :: [(String,[Double])] -> String
+--   plotVecs vs =  
+--       [$str| ## Plot multiple vectors
+--              plot #(n,_) in vs:'-' with lines lw 5 title $n$ |, #
+--              #d in map snd vs:$singleVec d$$endline$e$endline$# |]
+--   where
+--    singleVec n = [$str|#(e,i) in zip n [1..]: $:i$ $:e$|$endline$#|]
 --   @
 --   
---   Which will evaluate to @ 1--2--3 @ given myList of [1,2,3]
+--   @
+--  *Gnuplotter> plotVecs [("A",[1..5]),("B",[2..6])]
+--  # Plot multiple vectors
+--   plot '-' with lines lw 5 title A , '-' with lines lw 5 title B 
+--    1 1.0
+--    2 2.0
+--    3 3.0
+--    4 4.0
+--    5 5.0
 --   
--- 
---   Multiline indentation is handled by aligning on smallest un-empty
---   line after the first.
---
---   Pattern matching is not supported. 
---
+--   e
+--    1 2.0
+--    2 3.0
+--    3 4.0
+--    4 5.0
+--    5 6.0
+--   
+--   e
+--   @
 
 str  :: QuasiQuoter
 str  =  QuasiQuoter quoteExprExp undefined
+
+-- ** Predefined strings
+
+-- | End of the line  
+endline :: String
+endline = "\n"
+
+-- | Tab
+tab :: String
+tab = "\t"
+
+
 --
 quoteExprExp s = psToStringE (parParse $ norming s)
 --
diff --git a/Interpolation.cabal b/Interpolation.cabal
--- a/Interpolation.cabal
+++ b/Interpolation.cabal
@@ -1,9 +1,11 @@
 Name:                  Interpolation
-Version:             0.2
+Version:             0.2.1
 Description:         This package adds quasiquoter for multiline 
                      strings, interpolation and simple templating.
-                     Handy for text generation.
-Category:            Text
+                     It can handle repetition templates which makes it
+                     Handy for outputting larger structures, such as
+                     latex tables or gnuplot files.
+Category:            Data,Text
 Synopsis:            Multiline strings, interpolation and templating.
 License:             OtherLicense
 License-file:        LICENSE