diff --git a/io/src/TDirectoryFile.cxx b/io/src/TDirectoryFile.cxx
index 13e2bcdb04ff9ac03be2e7549e61e0e8ace33489..60154bf16808cc652f051ebd38960a4777396148 100644
--- a/io/src/TDirectoryFile.cxx
+++ b/io/src/TDirectoryFile.cxx
@@ -1,4 +1,4 @@
-// @(#)root/io:$Name: $:$Id: TDirectoryFile.cxx,v 1.7 2007/02/05 18:09:46 brun Exp $
+// @(#)root/io:$Name: $:$Id: TDirectoryFile.cxx,v 1.8 2007/02/09 10:16:07 rdm Exp $
// Author: Rene Brun 22/01/2007
/*************************************************************************
@@ -9,6 +9,21 @@
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
+//______________________________________________________________________________
+//
+// A ROOT file is structured in Directories (like a file system).
+// Each Directory has a list of Keys (see TKeys) and a list of objects
+// in memory. A Key is a small object that describes the type and location
+// of a persistent object in a file. The persistent object may be a directory.
+//Begin_Html
+/*
+<img src="gif/fildir.gif">
+*/
+//End_Html
+//
+// The structure of a file is shown in TFile::TFile
+//______________________________________________________________________________
+
#include "Riostream.h"
#include "Strlen.h"
#include "TDirectoryFile.h"
@@ -35,29 +50,8 @@
const UInt_t kIsBigFile = BIT(16);
const Int_t kMaxLen = 2048;
-//______________________________________________________________________________
-//Begin_Html
-/*
-<img src="gif/tdirectory_classtree.gif">
-*/
-//End_Html
-
ClassImp(TDirectoryFile)
-//______________________________________________________________________________
-//
-// A ROOT file is structured in Directories (like a file system).
-// Each Directory has a list of Keys (see TKeys) and a list of objects
-// in memory. A Key is a small object that describes the type and location
-// of a persistent object in a file. The persistent object may be a directory.
-//Begin_Html
-/*
-<img src="gif/fildir.gif">
-*/
-//End_Html
-//
-// The structure of a file is shown in TFile::TFile
-//
//______________________________________________________________________________
TDirectoryFile::TDirectoryFile() : TDirectory()
diff --git a/io/src/TFile.cxx b/io/src/TFile.cxx
index d1c30708998721451fbf1dd1339c9b53dd9c5394..4e326e9c41073f0f1a72a59caaf6be7254495039 100644
--- a/io/src/TFile.cxx
+++ b/io/src/TFile.cxx
@@ -1,4 +1,4 @@
-// @(#)root/io:$Name: $:$Id: TFile.cxx,v 1.204 2007/01/29 15:53:35 brun Exp $
+// @(#)root/io:$Name: $:$Id: TFile.cxx,v 1.205 2007/02/09 10:16:07 rdm Exp $
// Author: Rene Brun 28/11/94
/*************************************************************************
@@ -9,6 +9,54 @@
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
+////////////////////////////////////////////////////////////////////////////////
+// A ROOT file is a suite of consecutive data records (TKey's) with
+// the following format (see also the TKey class). If the key is
+// located past the 32 bit file limit (> 2 GB) then some fields will
+// be 8 instead of 4 bytes:
+// 1->4 Nbytes = Length of compressed object (in bytes)
+// 5->6 Version = TKey version identifier
+// 7->10 ObjLen = Length of uncompressed object
+// 11->14 Datime = Date and time when object was written to file
+// 15->16 KeyLen = Length of the key structure (in bytes)
+// 17->18 Cycle = Cycle of key
+// 19->22 [19->26] SeekKey = Pointer to record itself (consistency check)
+// 23->26 [27->34] SeekPdir = Pointer to directory header
+// 27->27 [35->35] lname = Number of bytes in the class name
+// 28->.. [36->..] ClassName = Object Class Name
+// ..->.. lname = Number of bytes in the object name
+// ..->.. Name = lName bytes with the name of the object
+// ..->.. lTitle = Number of bytes in the object title
+// ..->.. Title = Title of the object
+// -----> DATA = Data bytes associated to the object
+//
+// The first data record starts at byte fBEGIN (currently set to kBEGIN).
+// Bytes 1->kBEGIN contain the file description, when fVersion >= 1000000
+// it is a large file (> 2 GB) and the offsets will be 8 bytes long and
+// fUnits will be set to 8:
+// 1->4 "root" = Root file identifier
+// 5->8 fVersion = File format version
+// 9->12 fBEGIN = Pointer to first data record
+// 13->16 [13->20] fEND = Pointer to first free word at the EOF
+// 17->20 [21->28] fSeekFree = Pointer to FREE data record
+// 21->24 [29->32] fNbytesFree = Number of bytes in FREE data record
+// 25->28 [33->36] nfree = Number of free data records
+// 29->32 [37->40] fNbytesName = Number of bytes in TNamed at creation time
+// 33->33 [41->41] fUnits = Number of bytes for file pointers
+// 34->37 [42->45] fCompress = Zip compression level
+// 38->41 [46->53] fSeekInfo = Pointer to TStreamerInfo record
+// 42->45 [54->57] fNbytesInfo = Number of bytes in TStreamerInfo record
+// 46->63 [58->75] fUUID = Universal Unique ID
+//Begin_Html
+/*
+<img src="gif/file_layout.gif">
+*/
+//End_Html
+//
+// The structure of a directory is shown in TDirectoryFile::TDirectoryFile
+//
+////////////////////////////////////////////////////////////////////////////////
+
#include "RConfig.h"
#include <fcntl.h>
@@ -185,50 +233,6 @@ TFile::TFile(const char *fname1, Option_t *option, const char *ftitle, Int_t com
// exit(-1);
// }
//
- // A ROOT file is a suite of consecutive data records (TKey's) with
- // the following format (see also the TKey class). If the key is
- // located past the 32 bit file limit (> 2 GB) then some fields will
- // be 8 instead of 4 bytes:
- // 1->4 Nbytes = Length of compressed object (in bytes)
- // 5->6 Version = TKey version identifier
- // 7->10 ObjLen = Length of uncompressed object
- // 11->14 Datime = Date and time when object was written to file
- // 15->16 KeyLen = Length of the key structure (in bytes)
- // 17->18 Cycle = Cycle of key
- // 19->22 [19->26] SeekKey = Pointer to record itself (consistency check)
- // 23->26 [27->34] SeekPdir = Pointer to directory header
- // 27->27 [35->35] lname = Number of bytes in the class name
- // 28->.. [36->..] ClassName = Object Class Name
- // ..->.. lname = Number of bytes in the object name
- // ..->.. Name = lName bytes with the name of the object
- // ..->.. lTitle = Number of bytes in the object title
- // ..->.. Title = Title of the object
- // -----> DATA = Data bytes associated to the object
- //
- // The first data record starts at byte fBEGIN (currently set to kBEGIN).
- // Bytes 1->kBEGIN contain the file description, when fVersion >= 1000000
- // it is a large file (> 2 GB) and the offsets will be 8 bytes long and
- // fUnits will be set to 8:
- // 1->4 "root" = Root file identifier
- // 5->8 fVersion = File format version
- // 9->12 fBEGIN = Pointer to first data record
- // 13->16 [13->20] fEND = Pointer to first free word at the EOF
- // 17->20 [21->28] fSeekFree = Pointer to FREE data record
- // 21->24 [29->32] fNbytesFree = Number of bytes in FREE data record
- // 25->28 [33->36] nfree = Number of free data records
- // 29->32 [37->40] fNbytesName = Number of bytes in TNamed at creation time
- // 33->33 [41->41] fUnits = Number of bytes for file pointers
- // 34->37 [42->45] fCompress = Zip compression level
- // 38->41 [46->53] fSeekInfo = Pointer to TStreamerInfo record
- // 42->45 [54->57] fNbytesInfo = Number of bytes in TStreamerInfo record
- // 46->63 [58->75] fUUID = Universal Unique ID
-//Begin_Html
-/*
-<img src="gif/file_layout.gif">
-*/
-//End_Html
- //
- // The structure of a directory is shown in TDirectoryFile::TDirectoryFile
if (!gROOT)
::Fatal("TFile::TFile", "ROOT system not initialized");