diff --git a/CHANGELOG.md b/CHANGELOG.md
index d679b649da..b158f1842d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,8 @@ different versioning scheme, following the Haskell community's
 ## Unreleased ##
 
 * `gbc` & compiler library: TBD (major bump needed)
+* IDL core version: 1.0 (first release)
+* IDL comm version: 1.0 (first release)
 * C++ version: TBD (minor bump needed)
 * C# NuGet version: TBD (minor bump needed)
 * C# Comm NuGet version: TBD (minor bump needed due to dependencies)
@@ -42,6 +44,17 @@ different versioning scheme, following the Haskell community's
   the same name, generated C++ would contain ambiguous references.
   [Issue #202](https://github.com/Microsoft/bond/issues/202)
 
+### IDL core ###
+
+* Set up a separate IDL directory so that IDL is independent of language
+  bindings. [Pull request #219](https://github.com/Microsoft/bond/pull/219)
+
+### IDL comm ###
+
+* Set up a separate IDL directory so that IDL is independent of language
+  bindings. Convert comm IDL files to use C++-style naming convention. [Pull
+  request #219](https://github.com/Microsoft/bond/pull/219)
+
 ### C++ ###
 
 * Improvements in the `nullable` implementation. [Pull request #174](https://github.com/Microsoft/bond/pull/174)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d474b38ae0..dab1175c3f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,6 +9,7 @@ set (CMAKE_MODULE_PATH
 
 enable_testing()
 
+set (BOND_IDL ${CMAKE_CURRENT_SOURCE_DIR}/idl)
 set (BOND_INCLUDE ${CMAKE_CURRENT_SOURCE_DIR}/cpp/inc)
 set (BOND_PYTHON_INCLUDE ${CMAKE_CURRENT_SOURCE_DIR}/python/inc)
 set (BOND_GENERATED ${CMAKE_CURRENT_SOURCE_DIR}/cpp/generated)
diff --git a/cmake/Bond.cmake b/cmake/Bond.cmake
index 5bb1d7ddce..eb9662c1b7 100644
--- a/cmake/Bond.cmake
+++ b/cmake/Bond.cmake
@@ -21,7 +21,7 @@ function (add_bond_codegen)
     else()
     endif()
     list (APPEND options --output-dir="${outputDir}")
-    list (APPEND options --import-dir="${BOND_INCLUDE}")
+    list (APPEND options --import-dir="${BOND_IDL}")
     foreach (dir ${arg_IMPORT_DIR})
         list(APPEND options --import-dir="${dir}")
     endforeach()
diff --git a/cpp/CMakeLists.txt b/cpp/CMakeLists.txt
index b1c313ec81..cacf9dec6d 100644
--- a/cpp/CMakeLists.txt
+++ b/cpp/CMakeLists.txt
@@ -1,6 +1,6 @@
 set (sources
-    ${BOND_INCLUDE}/bond/core/bond.bond
-    ${BOND_INCLUDE}/bond/core/bond_const.bond)
+    ${BOND_IDL}/bond/core/bond.bond
+    ${BOND_IDL}/bond/core/bond_const.bond)
 
 add_bond_codegen (${sources}
     ENUM_HEADER
@@ -72,4 +72,6 @@ install (TARGETS bond bond_apply
     ARCHIVE DESTINATION lib/bond
     INCLUDES DESTINATION include)
 
+install (DIRECTORY ${BOND_IDL}/bond/core/ DESTINATION include/bond/core)
+
 add_subdirectory (test)
diff --git a/cs/build/internal/Common.Internal.props b/cs/build/internal/Common.Internal.props
index 5bea0a25c8..88d0b1fb60 100644
--- a/cs/build/internal/Common.Internal.props
+++ b/cs/build/internal/Common.Internal.props
@@ -6,7 +6,7 @@
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
   </PropertyGroup>
   <PropertyGroup>
-    <BOND_INCLUDE_PATH Condition="'$(BOND_INCLUDE_PATH)' == ''">$(MSBuildThisFileDirectory)..\..\..\cpp\inc</BOND_INCLUDE_PATH>
+    <BOND_INCLUDE_PATH Condition="'$(BOND_INCLUDE_PATH)' == ''">$(MSBuildThisFileDirectory)..\..\..\idl</BOND_INCLUDE_PATH>
   </PropertyGroup>
   <Import Project="..\nuget\Common.props" />
   <PropertyGroup Condition="'$(BuildFramework)' == ''">
diff --git a/cs/nuget/bond.compiler.csharp.nuspec b/cs/nuget/bond.compiler.csharp.nuspec
index 4e32e8849c..6ce5e93fe0 100644
--- a/cs/nuget/bond.compiler.csharp.nuspec
+++ b/cs/nuget/bond.compiler.csharp.nuspec
@@ -28,8 +28,8 @@
          files in this package. They're pretty small. -->
 
     <file src="cs\tools\gbc.exe" target="tools" />
-    <file src="cpp\inc\bond\core\bond.bond" target="tools\inc\bond\core" />
-    <file src="cpp\inc\bond\core\bond_const.bond" target="tools\inc\bond\core" />
+    <file src="idl\bond\core\bond.bond" target="tools\inc\bond\core" />
+    <file src="idl\bond\core\bond_const.bond" target="tools\inc\bond\core" />
 
     <file src="cs\build\nuget\Bond.Compiler.CSharp.targets" target="build\net45" />
     <file src="cs\build\nuget\Bond.Compiler.CSharp.props" target="build\net45" />
diff --git a/cs/nuget/bond.compiler.nuspec b/cs/nuget/bond.compiler.nuspec
index 228ffb1111..8562c0bafc 100644
--- a/cs/nuget/bond.compiler.nuspec
+++ b/cs/nuget/bond.compiler.nuspec
@@ -25,7 +25,7 @@
     </metadata>
     <files>
         <file src="cs\tools\gbc.exe" target="tools" />
-        <file src="cpp\inc\bond\core\bond.bond" target="tools\inc\bond\core" />
-        <file src="cpp\inc\bond\core\bond_const.bond" target="tools\inc\bond\core" />
+        <file src="idl\bond\core\bond.bond" target="tools\inc\bond\core" />
+        <file src="idl\bond\core\bond_const.bond" target="tools\inc\bond\core" />
     </files>
 </package>
diff --git a/cs/nuget/bond.csharp.nuspec b/cs/nuget/bond.csharp.nuspec
index c8246295a3..88f6dcc9de 100644
--- a/cs/nuget/bond.csharp.nuspec
+++ b/cs/nuget/bond.csharp.nuspec
@@ -28,8 +28,8 @@
     </metadata>
     <files>
         <file src="cs\tools\gbc.exe" target="tools\" />
-        <file src="cpp\inc\bond\core\bond.bond" target="tools\inc\bond\core" />
-        <file src="cpp\inc\bond\core\bond_const.bond" target="tools\inc\bond\core" />
+        <file src="idl\bond\core\bond.bond" target="tools\inc\bond\core" />
+        <file src="idl\bond\core\bond_const.bond" target="tools\inc\bond\core" />
         <file src="cs\build\nuget\Bond.CSharp.targets" target="build" />
         <file src="cs\build\nuget\Bond.CSharp.props" target="build" />
         <file src="cs\build\nuget\Common.props" target="build" />
diff --git a/cs/src/comm/epoxy-transport/epoxy-transport.csproj b/cs/src/comm/epoxy-transport/epoxy-transport.csproj
index d7657583bd..ec73905798 100644
--- a/cs/src/comm/epoxy-transport/epoxy-transport.csproj
+++ b/cs/src/comm/epoxy-transport/epoxy-transport.csproj
@@ -23,11 +23,11 @@
     <Compile Include="EpoxyListener.cs" />
     <Compile Include="EpoxyProtocol.cs" />
     <Compile Include="EpoxyTransport.cs" />
-    <BondCodegen Include="EpoxyTransport.bond">
+    <BondCodegen Include="$(MSBuildThisFileDirectory)\..\..\..\..\idl\bond\comm\epoxy_transport.bond">
       <Options>--namespace=bond.comm=Bond.Comm --namespace=bond.comm.epoxy=Bond.Comm.Epoxy</Options>
     </BondCodegen>
     <!-- Resharper Workaround -->
-    <Compile Include="$(IntermediateOutputPath)\EpoxyTransport_types.cs" Condition="False" />
+    <Compile Include="$(IntermediateOutputPath)\epoxy_transport_types.cs" Condition="False" />
     <Compile Include="ResponseMap.cs" />
     <!-- End Resharper Workaround -->
   </ItemGroup>
diff --git a/cs/src/comm/interfaces/interfaces.csproj b/cs/src/comm/interfaces/interfaces.csproj
index fd0f9dbef6..ff64be8037 100644
--- a/cs/src/comm/interfaces/interfaces.csproj
+++ b/cs/src/comm/interfaces/interfaces.csproj
@@ -26,11 +26,11 @@
     <Compile Include="properties\AssemblyInfo.cs" />
     <Compile Include="Transport.cs" />
     <Compile Include="TransportException.cs" />
-    <BondCodegen Include="Comm.bond">
+    <BondCodegen Include="$(MSBuildThisFileDirectory)\..\..\..\..\idl\bond\comm\comm.bond">
       <Options>--namespace=bond.comm=Bond.Comm</Options>
     </BondCodegen>
     <!-- Resharper Workaround -->
-    <Compile Include="$(IntermediateOutputPath)\Comm_types.cs" Condition="False" />
+    <Compile Include="$(IntermediateOutputPath)\comm_types.cs" Condition="False" />
     <!-- End Resharper Workaround -->
   </ItemGroup>
   <ItemGroup>
diff --git a/cs/src/comm/interfaces/Comm.bond b/idl/bond/comm/comm.bond
similarity index 100%
rename from cs/src/comm/interfaces/Comm.bond
rename to idl/bond/comm/comm.bond
diff --git a/cs/src/comm/epoxy-transport/EpoxyTransport.bond b/idl/bond/comm/epoxy_transport.bond
similarity index 99%
rename from cs/src/comm/epoxy-transport/EpoxyTransport.bond
rename to idl/bond/comm/epoxy_transport.bond
index 7b1473f4a3..78bbca5893 100644
--- a/cs/src/comm/epoxy-transport/EpoxyTransport.bond
+++ b/idl/bond/comm/epoxy_transport.bond
@@ -1,7 +1,7 @@
 // Copyright (c) Microsoft. All rights reserved.
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
-import "Comm.bond"
+import "comm.bond"
 
 namespace bond.comm.epoxy;
 
diff --git a/cpp/inc/bond/core/bond.bond b/idl/bond/core/bond.bond
similarity index 100%
rename from cpp/inc/bond/core/bond.bond
rename to idl/bond/core/bond.bond
diff --git a/cpp/inc/bond/core/bond_const.bond b/idl/bond/core/bond_const.bond
similarity index 100%
rename from cpp/inc/bond/core/bond_const.bond
rename to idl/bond/core/bond_const.bond