Index: include/COLLADASWConstants.h
===================================================================
--- include/COLLADASWConstants.h	(revision 587)
+++ include/COLLADASWConstants.h	(working copy)
@@ -46,7 +46,8 @@
         static const String CSW_ELEMENT_BLINN;
         static const String CSW_ELEMENT_BIND;
         static const String CSW_ELEMENT_BIND_MATERIAL;
-        static const String CSW_ELEMENT_BIND_SHAPE_MATRIX;
+		static const String CSW_ELEMENT_BIND_SHAPE_MATRIX;
+		static const String CSW_ELEMENT_BIND_VERTEX_INPUT;
         static const String CSW_ELEMENT_BORDER_COLOR;
         static const String CSW_ELEMENT_CAMERA;
         static const String CSW_ELEMENT_CAMERA_ORTHOGRAPHIC;
@@ -219,7 +220,9 @@
         static const String CSW_ATTRIBUTE_END;
         static const String CSW_ATTRIBUTE_FACE;
         static const String CSW_ATTRIBUTE_ID;
-        static const String CSW_ATTRIBUTE_INDEX;
+		static const String CSW_ATTRIBUTE_INDEX;
+		static const String CSW_ATTRIBUTE_INPUT_SEMANTIC;
+		static const String CSW_ATTRIBUTE_INPUT_SET;
         static const String CSW_ATTRIBUTE_MATERIAL;
         static const String CSW_ATTRIBUTE_METER;
         static const String CSW_ATTRIBUTE_METHOD;
Index: include/COLLADASWInstanceMaterial.h
===================================================================
--- include/COLLADASWInstanceMaterial.h	(revision 587)
+++ include/COLLADASWInstanceMaterial.h	(working copy)
@@ -22,14 +22,61 @@
 namespace COLLADASW
 {
 
+    class BindVertexInput
+	{
+	private:
+		/** Which effect parameter to bind. Required.*/
+		String mSemantic;
+
+		/** Which input semantic to bind. Required.*/
+		String mInputSemantic;
+
+		/** Which input set to bind. Optional. -1 if not set.*/
+		int mInputSet;
+	public:
+
+		BindVertexInput(const COLLADASW::String& semantic, const COLLADASW::String& inputSemantic, int inputSet = -1)
+			: mSemantic(semantic), mInputSemantic(inputSemantic), mInputSet(inputSet){}
+
+		/** Which effect parameter to bind. Required.*/
+		const COLLADASW::String& getSemantic() const { return mSemantic; }
+
+		/** Which effect parameter to bind. Required.*/
+		void setSemantic(const COLLADASW::String& semantic) { mSemantic = semantic; }
+
+		/** Which input semantic to bind. Required.*/
+		const COLLADASW::String& getInputSemantic() const { return mInputSemantic; }
+
+		/** Which input semantic to bind. Required.*/
+		void setInputSemantic(const COLLADASW::String& inputSemantic) { mInputSemantic = inputSemantic; }
+		
+		/** Which input set to bind. Optional. -1 if not set.*/
+		int getInputSet() const { return mInputSet; }
+
+		/** Which input set to bind. Optional. -1 if not set.*/
+		void setInputSet(int inputSet) { mInputSet = inputSet; }
+
+	private:
+		/** Set this class a friend, so it can call the add() method.  */
+		friend class InstanceMaterial;
+
+		/** Add all the instance materials, added using push_back(), to the stream*/
+		void add( StreamWriter* sw);
+
+	};
+
+
     class InstanceMaterialList;
 
     /** A class that holds informations of an @a \<instance_material\> element*/
     class InstanceMaterial
     {
-
+	private:
+		/** List of all the BindVertexInput*/
+		typedef std::list<BindVertexInput> BindVertexInputList;
     private:
 
+		BindVertexInputList mBindVertexInputList;
         String mSymbol;
         URI mTarget;
 
@@ -43,17 +90,22 @@
         : mSymbol ( symbol ), mTarget ( target ) {}
 
         /** Returns the symbol*/
-        const String & getSymbol() const
-        {
-            return mSymbol;
-        }
+        const String & getSymbol() const {return mSymbol; }
 
         /** Returns the target*/
-        const URI & getTarget() const
-        {
-            return mTarget;
-        }
+        const URI & getTarget() const { return mTarget; }
 
+		/** Adds @a input to list of inputs that should be added*/
+		void push_back ( const BindVertexInput& input ) { mBindVertexInputList.push_back ( input ); }
+
+	private:
+		/** Set this class a friend, so it can call the add() method.  */
+		friend class InstanceMaterialList;
+
+		/** Add all the instance materials, added using push_back(), to the stream*/
+		void add( StreamWriter* sw);
+
+
     };
 
     /** A class that hold a list of instances of InstanceMaterial and writes it to stream*/
@@ -70,16 +122,10 @@
         virtual ~InstanceMaterialList() {}
 
         /** Adds @a input to list of inputs that should be added*/
-        void push_back ( InstanceMaterial input )
-        {
-            mList.push_back ( input );
-        }
+        void push_back ( const InstanceMaterial& input ) { mList.push_back ( input ); }
 
         /** Return true, if the list of material bindings is empty, false otherwise*/
-        bool empty() const
-        {
-            return mList.empty();
-        }
+        bool empty() const { return mList.empty(); }
 
     private:
 
Index: src/COLLADASWConstants.cpp
===================================================================
--- src/COLLADASWConstants.cpp	(revision 587)
+++ src/COLLADASWConstants.cpp	(working copy)
@@ -38,7 +38,8 @@
     const String CSWC::CSW_ELEMENT_BLINN = "blinn";
     const String CSWC::CSW_ELEMENT_BIND = "bind";
     const String CSWC::CSW_ELEMENT_BIND_MATERIAL = "bind_material";
-    const String CSWC::CSW_ELEMENT_BIND_SHAPE_MATRIX = "bind_shape_matrix";
+	const String CSWC::CSW_ELEMENT_BIND_SHAPE_MATRIX = "bind_shape_matrix";
+	const String CSWC::CSW_ELEMENT_BIND_VERTEX_INPUT = "bind_vertex_input";
     const String CSWC::CSW_ELEMENT_BORDER_COLOR = "border_color";
     const String CSWC::CSW_ELEMENT_CAMERA = "camera";
     const String CSWC::CSW_ELEMENT_CAMERA_ORTHOGRAPHIC = "orthographic";
@@ -209,7 +210,9 @@
     const String CSWC::CSW_ATTRIBUTE_END = "end";
     const String CSWC::CSW_ATTRIBUTE_FACE = "face";
     const String CSWC::CSW_ATTRIBUTE_ID = "id";
-    const String CSWC::CSW_ATTRIBUTE_INDEX = "index";
+	const String CSWC::CSW_ATTRIBUTE_INDEX = "index";
+	const String CSWC::CSW_ATTRIBUTE_INPUT_SEMANTIC = "input_semantic";
+	const String CSWC::CSW_ATTRIBUTE_INPUT_SET = "input_set";
     const String CSWC::CSW_ATTRIBUTE_MATERIAL = "material";
     const String CSWC::CSW_ATTRIBUTE_METER = "meter";
     const String CSWC::CSW_ATTRIBUTE_METHOD = "method";
Index: src/COLLADASWInstanceMaterial.cpp
===================================================================
--- src/COLLADASWInstanceMaterial.cpp	(revision 587)
+++ src/COLLADASWInstanceMaterial.cpp	(working copy)
@@ -19,11 +19,32 @@
     {
         for ( List::iterator it = mList.begin(); it != mList.end(); ++it )
         {
-            mSW->openElement ( CSWC::CSW_ELEMENT_INSTANCE_MATERIAL );
-            mSW->appendAttribute ( CSWC::CSW_ATTRIBUTE_SYMBOL, it->getSymbol() );
-            mSW->appendURIAttribute ( CSWC::CSW_ATTRIBUTE_TARGET, it->getTarget() );
-            mSW->closeElement();
+			it->add( mSW );
         }
     }
 
+
+	//---------------------------------------------------------------
+	void InstanceMaterial::add( StreamWriter* sw )
+	{
+		sw->openElement ( CSWC::CSW_ELEMENT_INSTANCE_MATERIAL );
+		sw->appendAttribute ( CSWC::CSW_ATTRIBUTE_SYMBOL, getSymbol() );
+		sw->appendURIAttribute ( CSWC::CSW_ATTRIBUTE_TARGET, getTarget() );
+		for ( BindVertexInputList::iterator it = mBindVertexInputList.begin(); it != mBindVertexInputList.end(); ++it)
+		{
+			it->add( sw );
+		}
+
+		sw->closeElement();
+	}
+
+	//---------------------------------------------------------------
+	void BindVertexInput::add( StreamWriter* sw )
+	{
+		sw->openElement ( CSWC::CSW_ELEMENT_INSTANCE_MATERIAL );
+		sw->appendAttribute ( CSWC::CSW_ATTRIBUTE_SEMANTIC, getSemantic() );
+		sw->appendAttribute ( CSWC::CSW_ATTRIBUTE_INPUT_SEMANTIC, getInputSemantic() );
+		sw->appendAttribute ( CSWC::CSW_ATTRIBUTE_INPUT_SET, getInputSet() );
+		sw->closeElement();
+	}
 } //namespace COLLADASW