diff --git a/src/Graphics/VinylGL/Uniforms.hs b/src/Graphics/VinylGL/Uniforms.hs
--- a/src/Graphics/VinylGL/Uniforms.hs
+++ b/src/Graphics/VinylGL/Uniforms.hs
@@ -7,7 +7,8 @@
 -- record corresponds to a uniform parameter of the given shader
 -- program, and that the types all agree.
 module Graphics.VinylGL.Uniforms (setAllUniforms, setSomeUniforms, setUniforms,
-                                  HasFieldGLTypes(..), SetUniformFields) where
+                                  HasFieldGLTypes(..), UniformFields,
+                                  SetUniformFields) where
 import Control.Applicative ((<$>))
 import Data.Foldable (traverse_)
 import qualified Data.Map as M
@@ -34,6 +35,8 @@
   fieldGLTypes _ = variableType (undefined::t) 
                    : fieldGLTypes (undefined::PlainFieldRec ts)
 
+-- | Constraint synonym for 'PlainFieldRec's that carry valid GLSL
+-- uniforms.
 type UniformFields a = (HasFieldNames a, HasFieldGLTypes a, SetUniformFields a)
 
 -- | Set GLSL uniform parameters from a 'PlainRec'. A check is
@@ -138,6 +141,8 @@
 glTypeEquiv :: VariableType -> VariableType -> Bool
 glTypeEquiv x y = glTypeEquiv' x y || glTypeEquiv' y x
 
+-- | Zips up lists of 'UniformLocation's and a 'PlainFieldRec' setting
+-- uniform parameters using the record fields.
 class SetUniformFields a where
   setUniformFields :: [Maybe UniformLocation] -> a -> IO ()
 
diff --git a/src/Graphics/VinylGL/Vertex.hs b/src/Graphics/VinylGL/Vertex.hs
--- a/src/Graphics/VinylGL/Vertex.hs
+++ b/src/Graphics/VinylGL/Vertex.hs
@@ -5,7 +5,7 @@
 -- with vertices represented as vinyl records.
 module Graphics.VinylGL.Vertex (bufferVertices, bindVertices, reloadVertices,
                                 deleteVertices, enableVertices, enableVertices',
-                                enableVertexFields,
+                                enableVertexFields, ViableVertex,
                                 BufferedVertices(..), fieldToVAD) where
 import Control.Applicative
 import Control.Arrow (second)
@@ -94,7 +94,7 @@
         n = fromSing (sing::Sing sy)
 #endif
 
--- Constraint alias capturing the requirements of a vertex type.
+-- | Constraint alias capturing the requirements of a vertex type.
 type ViableVertex t = (HasFieldNames t, HasFieldSizes t, HasFieldDims t,
                        HasFieldGLTypes t, Storable t)
 
diff --git a/vinyl-gl.cabal b/vinyl-gl.cabal
--- a/vinyl-gl.cabal
+++ b/vinyl-gl.cabal
@@ -1,5 +1,5 @@
 name:          vinyl-gl
-version:       0.2.0.2
+version:       0.2.1
 synopsis:      Utilities for working with OpenGL's GLSL shading language and vinyl records.
 description:   Using "Data.Vinyl" records (similar in spirit to @HList@)
                to carry GLSL uniform parameters and vertex data enables