diff --git a/NEWS b/NEWS
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,26 @@
+razom-text-util 0.1.1.0 -- 2015-05-30
+=====================================
+
+General, build and documentation changes:
+
+* (None)
+
+New APIs, features and enhancements:
+
+* Add tokenizer functions
+
+Bug fixes:
+
+* (None)
+
+Dependency changes:
+
+* (None)
+
+
+
+
+
 razom-text-util 0.1.0.0 -- 2015-05-05
 =====================================
 
diff --git a/razom-text-util.cabal b/razom-text-util.cabal
--- a/razom-text-util.cabal
+++ b/razom-text-util.cabal
@@ -1,5 +1,5 @@
 name:                razom-text-util
-version:             0.1.0.0
+version:             0.1.1.0
 synopsis:            Common text/parsing tools for Razom language packages.
 description:         This is a library of utilities for writing code that
                      handles semantic information documents (text files). It is
@@ -25,6 +25,7 @@
 library
   exposed-modules:     Text.Razom
                      , Text.Razom.Char
+                     , Text.Razom.Lexer
                      , Text.Razom.Number
                      , Text.Razom.Types
                      , Text.Razom.Uid
diff --git a/src/Text/Razom.hs b/src/Text/Razom.hs
--- a/src/Text/Razom.hs
+++ b/src/Text/Razom.hs
@@ -15,6 +15,7 @@
 
 module Text.Razom
     ( module Text.Razom.Char
+    , module Text.Razom.Lexer
     , module Text.Razom.Number
     , module Text.Razom.Types
     , module Text.Razom.Uid
@@ -23,6 +24,7 @@
 where
 
 import Text.Razom.Char
+import Text.Razom.Lexer
 import Text.Razom.Number
 import Text.Razom.Types
 import Text.Razom.Uid
diff --git a/src/Text/Razom/Char.hs b/src/Text/Razom/Char.hs
--- a/src/Text/Razom/Char.hs
+++ b/src/Text/Razom/Char.hs
@@ -22,5 +22,4 @@
 
 -- | Selects Unicode characters with basic type Graphical.
 isGraphical :: Char -> Bool
-isGraphical c = isLetter c || isMark c || isNumber c || isPunctuation c
-             || isSymbol c || generalCategory c == Space
+isGraphical = isPrint
diff --git a/src/Text/Razom/Lexer.hs b/src/Text/Razom/Lexer.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/Razom/Lexer.hs
@@ -0,0 +1,41 @@
+{- This file is part of razom-text-util.
+ -
+ - Written in 2015 by fr33domlover <fr33domlover@rel4tion.org>.
+ -
+ - ♡ Copying is an act of love. Please copy, reuse and share.
+ -
+ - The author(s) have dedicated all copyright and related and neighboring
+ - rights to this software to the public domain worldwide. This software is
+ - distributed without any warranty.
+ -
+ - You should have received a copy of the CC0 Public Domain Dedication along
+ - with this software. If not, see
+ - <http://creativecommons.org/publicdomain/zero/1.0/>.
+ -}
+
+module Text.Razom.Lexer
+    ( tokenizeString
+    , tokenizeFile
+    )
+where
+
+import Data.Position
+import Text.Razom.Types
+import Text.Regex.Applicative
+import System.IO
+
+tokenizeString :: Advance Char -> Regex t -> String -> LexResult t
+tokenizeString adv re syms =
+    let depos = map $ \ (Positioned x pos) -> x
+        re'   = many $ bless re
+        syms' = fst $ enrich adv syms
+    in case findLongestPrefix re' syms' of
+        Just (ts, [])                      ->
+            Right $ depos ts
+        Just (ts, ((Positioned c pos):ps)) ->
+            Left $ LexError pos (depos ts) (c : (depos ps))
+        Nothing                            ->
+            Left $ LexError firstPosition [] syms
+
+tokenizeFile :: Advance Char -> Regex t -> FilePath -> IO (LexResult t)
+tokenizeFile adv re fp = readFile fp >>= return . tokenizeString adv re
diff --git a/src/Text/Razom/Types.hs b/src/Text/Razom/Types.hs
--- a/src/Text/Razom/Types.hs
+++ b/src/Text/Razom/Types.hs
@@ -17,6 +17,7 @@
     ( Regex
     , PosRegex
     , LexError (..)
+    , LexResult (..)
     )
 where
 
@@ -35,3 +36,6 @@
 -- (2) Previous tokens parsed successfully
 -- (3) The rest of the text
 data LexError t = LexError Position [t] String deriving Show
+
+-- | What is returned by lexical analyzer.
+type LexResult t = Either (LexError t) [t]