diff --git a/wrap/io_trimesh/export_dxf.h b/wrap/io_trimesh/export_dxf.h
index 3d035805..0c0c2a18 100644
--- a/wrap/io_trimesh/export_dxf.h
+++ b/wrap/io_trimesh/export_dxf.h
@@ -20,6 +20,11 @@
 * for more details.                                                         *
 *                                                                           *
 ****************************************************************************/
+/****************************************************************************
+History
+$Log: not supported by cvs2svn $
+****************************************************************************/
+
 #ifndef __VCGLIB_EXPORT_DXF
 #define __VCGLIB_EXPORT_DXF
 
@@ -28,14 +33,14 @@ namespace tri {
 namespace io {
 
 template <class SaveMeshType>
+/** 
+This class encapsulate a filter for save dxf meshes.
+*/
 class ExporterDXF
 {
 public:
-
-    /*
-       Prima versione da rivedere e ottimizzare, ma compatibile con Autocad.	
-    */
-	static int Save(SaveMeshType &m, const char * filename)
+	///Standard call for saving a mesh
+    static int Save(SaveMeshType &m, const char * filename)
 	{
 	
 		FILE * o = fopen(filename,"w");
@@ -79,7 +84,7 @@ public:
 		fclose(o);
 		return 0;
 	}
-
+		/// Standard call for knowing the meaning of an error code
 	    static const char *ErrorMsg(int error)
         {
           static std::vector<std::string> dxf_error_msg;
diff --git a/wrap/io_trimesh/export_smf.h b/wrap/io_trimesh/export_smf.h
index 773f4de6..c8d880c7 100644
--- a/wrap/io_trimesh/export_smf.h
+++ b/wrap/io_trimesh/export_smf.h
@@ -23,6 +23,7 @@
 /****************************************************************************
   History
 $Log: not supported by cvs2svn $
+Revision 1.2  2006/11/16 11:24:44 
 ****************************************************************************/
 
 #ifndef __VCGLIB_EXPORT_SMF
@@ -35,6 +36,9 @@ namespace tri {
 namespace io {
 	
 	template <class SaveMeshType>
+	/** 
+	This class encapsulate a filter for save smf meshes.
+	*/
 	class ExporterSMF
 	{
 	public:
@@ -45,6 +49,7 @@ namespace io {
 		typedef typename SaveMeshType::VertexIterator VertexIterator;
 		typedef typename SaveMeshType::FaceIterator FaceIterator;
 		
+		///Standard call for saving a mesh
 		static int Save(SaveMeshType &m, const char * filename, const int &mask, CallBackPos *cb=0)
 		{
 			VertexIterator vi;
@@ -75,6 +80,8 @@ namespace io {
 			fclose(fp);
 			return 0;
 		}
+
+		/// Standard call for knowing the meaning of an error code
 		static const char *ErrorMsg(int error)
 		{
 			static std::vector<std::string> smf_error_msg;
diff --git a/wrap/io_trimesh/import_ptx.h b/wrap/io_trimesh/import_ptx.h
index 999039b3..46402101 100644
--- a/wrap/io_trimesh/import_ptx.h
+++ b/wrap/io_trimesh/import_ptx.h
@@ -20,6 +20,11 @@
 * for more details.                                                         *
 *                                                                           *
 ****************************************************************************/
+/****************************************************************************
+History
+$Log: not supported by cvs2svn $
+****************************************************************************/
+
 #ifndef __VCGLIB_IMPORT_PTX
 #define __VCGLIB_IMPORT_PTX
 
@@ -69,7 +74,8 @@ namespace vcg {
 					int    fn;
 					RANGEMAP_INFO_TABLE rmapInfo; 
 				};
-
+				
+				/// Standard call for knowing the meaning of an error code
 				static const char *ErrorMsg(int error)
 				{
 					static const char * ptx_error_msg[] =
@@ -84,6 +90,7 @@ namespace vcg {
 					if(error>6 || error<0) return "Unknown error";
 					else return ptx_error_msg[error];
 				};
+
 				static bool skipmesh(FILE* fp, CallBackPos *cb=NULL)
 				{
 					PTX_HEAD_INFO tab;
@@ -537,7 +544,7 @@ namespace vcg {
 
 
 				}
-
+				///Call that load a mesh
 				static bool readPTX( OpenMeshType &m, FILE *fp, int mask, CallBackPos *cb=NULL)
 				{
 					int numtokens;
@@ -755,7 +762,7 @@ namespace vcg {
 					return true;
 				}
 
-				//The Open function called from meshio.cpp
+				///Standard call that reading a mesh
 				static int Open( OpenMeshType &m, const char * filename, int mask = PTX_ONLY_POINTS, CallBackPos *cb=NULL)
 				{
 					FILE *fp;
diff --git a/wrap/io_trimesh/import_smf.h b/wrap/io_trimesh/import_smf.h
index f79de842..55b126c2 100644
--- a/wrap/io_trimesh/import_smf.h
+++ b/wrap/io_trimesh/import_smf.h
@@ -23,7 +23,6 @@
 /****************************************************************************
   History
 $Log: not supported by cvs2svn $
-
 ****************************************************************************/
 
 #ifndef __VCGLIB_IMPORTER_SMF
@@ -36,6 +35,9 @@ namespace vcg {
 namespace tri {
 namespace io {
 	template<class OpenMeshType>
+	/** 
+	This class encapsulate a filter for opening smf meshes.
+	*/
 	class ImporterSMF
 	{
 	public:
@@ -63,6 +65,7 @@ namespace io {
 			E_UNESPECTEDEOF       	// 2
 		};
 		
+		/// Standard call for knowing the meaning of an error code
 		static const char *ErrorMsg(int error)
 		{
 			static const char * smf_error_msg[] =
@@ -74,6 +77,7 @@ namespace io {
 			if(error>2 || error<0) return "Unknown error";
 			else return smf_error_msg[error];
 		};
+		///Standard call for reading a mesh
 		static int Open(OpenMeshType &m, const char * filename )
 		{
 			VertexType v;