diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright (c) 2014, Ben Gamari
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Ben Gamari nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
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+import Distribution.Simple
+main = defaultMain
diff --git a/Text/Pandoc/Lens.hs b/Text/Pandoc/Lens.hs
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--- /dev/null
+++ b/Text/Pandoc/Lens.hs
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+{-# LANGUAGE RankNTypes #-}
+
+module Text.Pandoc.Lens where
+                
+import Control.Applicative
+import Control.Lens
+import Text.Pandoc.Definition
+import Data.Map (Map)
+
+body :: Lens' Pandoc [Block]
+body = lens (\(Pandoc _ b)->b) (\(Pandoc m _) b->Pandoc m b)
+
+_Plain :: Prism' Block [Inline]
+_Plain = prism' Plain f
+  where
+    f (Plain x) = Just x
+    f _         = Nothing
+
+_Para :: Prism' Block [Inline]
+_Para = prism' Para f
+  where
+    f (Para x)  = Just x
+    f _         = Nothing
+
+_CodeBlock :: Prism' Block String
+_CodeBlock = prism' (CodeBlock nullAttr) f
+  where
+    f (CodeBlock _ x)    = Just x
+    f _                  = Nothing
+
+_BlockQuote :: Prism' Block [Block]
+_BlockQuote = prism' BlockQuote f
+  where
+    f (BlockQuote x)     = Just x
+    f _                  = Nothing
+
+_BulletList :: Prism' Block [[Block]]
+_BulletList = prism' BulletList f
+  where
+    f (BulletList x)     = Just x
+    f _                  = Nothing
+      
+_DefinitionList :: Prism' Block [([Inline], [[Block]])]
+_DefinitionList = prism' DefinitionList f
+  where
+    f (DefinitionList x) = Just x
+    f _                  = Nothing
+
+_HorizontalRule :: Prism' Block ()
+_HorizontalRule = prism' (const HorizontalRule) f
+  where
+    f HorizontalRule     = Just ()
+    f _                  = Nothing
+
+_Null :: Prism' Block ()
+_Null = prism' (const Null) f
+  where
+    f Null = Just ()
+    f _    = Nothing
+
+--makePrisms ''Inline
+--makePrisms ''MetaValue
+
+--meta :: String -> Prism' Pandoc MetaValue
+meta m = metaL . unwrap . ix m
+  where
+    unwrap :: Iso' Meta (Map String MetaValue)
+    unwrap = iso unMeta Meta
+    metaL :: Lens' Pandoc Meta
+    metaL = lens (\(Pandoc m _)->m) (\(Pandoc _ a) m->Pandoc m a)
+  
+class HasAttr a where
+  attributes :: Traversal' a Attr
+  
+instance HasAttr Block where
+  attributes f (CodeBlock a s) = fmap (\a'->CodeBlock a' s) (f a)
+  attributes f (Header n a s)  = fmap (\a'->Header n a' s) (f a)
+  attributes f (Div a s)       = fmap (\a'->Div a' s) (f a)
+  attributes _ x = pure x
diff --git a/pandoc-lens.cabal b/pandoc-lens.cabal
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--- /dev/null
+++ b/pandoc-lens.cabal
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+name:                pandoc-lens
+version:             0.1.0.0
+synopsis:            Lenses for Pandoc documents
+description:         Lenses for Pandoc documents
+homepage:            http://github.com/bgamari/pandoc-lens
+license:             BSD3
+license-file:        LICENSE
+author:              Ben Gamari
+maintainer:          bgamari.foss@gmail.com
+copyright:           (c) 2014 Ben Gamari
+category:            Text
+build-type:          Simple
+cabal-version:       >=1.10
+
+source-repository head
+  type:                git
+  location:            git://github.com/bgamari/pandoc-lenses
+
+library
+  exposed-modules:     Text.Pandoc.Lens
+  build-depends:       base >=4.7 && <4.8, pandoc-types >=1.12 && <1.13, lens >=4.2 && <4.3, containers
+  default-language:    Haskell2010