diff --git a/relational-record.cabal b/relational-record.cabal
--- a/relational-record.cabal
+++ b/relational-record.cabal
@@ -1,5 +1,5 @@
 name:                relational-record
-version:             0.1.0.0
+version:             0.1.0.1
 synopsis:            Meta package of Relational Record
 description:         Meta package to install Relational Record quickly
 homepage:            http://khibino.github.io/haskell-relational-record/
diff --git a/src/Database/Relational/Query/Documentation.hs b/src/Database/Relational/Query/Documentation.hs
--- a/src/Database/Relational/Query/Documentation.hs
+++ b/src/Database/Relational/Query/Documentation.hs
@@ -63,6 +63,8 @@
 
   -- *** Projection Operators
   -- $projectionOperators
+  value, values,
+
   (.=.), (.<.), (.<=.), (.>.), (.>=.), (.<>.),
   casesOrElse, case',
   in', and', or',
@@ -237,6 +239,8 @@
 Some operators are defined to caluculate projected values.
 
 For example,
+'value' operator projects from Haskell value into 'Projection' corresponding SQL value,
+'values' operator projects from Haskell list value into 'ListProjection', corresponding SQL set value,
 '.=.' operator is equal compare operation of projected value correspond to SQL =,
 '.+.' operator is plus operation of projected value coresspond to SQL +, and so on.