diff --git a/htdocs/install/mysql/migration/2.9.0-3.0.0.sql b/htdocs/install/mysql/migration/2.9.0-3.0.0.sql
index 2e194d17f2b..756d1312134 100644
--- a/htdocs/install/mysql/migration/2.9.0-3.0.0.sql
+++ b/htdocs/install/mysql/migration/2.9.0-3.0.0.sql
@@ -41,9 +41,19 @@ ALTER TABLE llx_expedition MODIFY date_expedition datetime;
 ALTER TABLE llx_expedition MODIFY date_delivery datetime NULL;
 
 ALTER TABLE llx_societe ADD COLUMN canvas varchar(32) DEFAULT NULL AFTER default_lang;
---UPDATE llx_societe SET canvas='default' WHERE canvas IS NULL;
---UPDATE llx_societe SET canvas='default' WHERE fk_typent <> 8;
---UPDATE llx_societe SET canvas='individual' WHERE fk_typent = 8;
 
 ALTER TABLE llx_cond_reglement RENAME TO llx_c_payment_term;
 ALTER TABLE llx_expedition_methode RENAME TO llx_c_shipment_mode;
+
+create table llx_element_rang
+(
+  rowid           	integer AUTO_INCREMENT PRIMARY KEY,  
+  fk_parent			integer NOT NULL,
+  parenttype		varchar(16) NOT NULL,
+  fk_child			integer NOT NULL,
+  childtype			varchar(16) NOT NULL,
+  rang				integer	DEFAULT 0
+) type=innodb;
+
+ALTER TABLE llx_element_rang ADD UNIQUE INDEX idx_element_rang_idx1 (fk_parent, parenttype, fk_child, childtype);
+ALTER TABLE llx_element_rang ADD INDEX idx_element_rang_fk_parent (fk_parent);
diff --git a/htdocs/install/mysql/tables/llx_element_rang.key.sql b/htdocs/install/mysql/tables/llx_element_rang.key.sql
new file mode 100644
index 00000000000..8f8d8b2a09e
--- /dev/null
+++ b/htdocs/install/mysql/tables/llx_element_rang.key.sql
@@ -0,0 +1,28 @@
+-- ============================================================================
+-- Copyright (C) 2010 Regis Houssin  <regis@dolibarr.fr>
+--
+-- This program is free software; you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program; if not, write to the Free Software
+-- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+--
+-- $Id$
+-- ============================================================================
+
+
+ALTER TABLE llx_element_rang ADD UNIQUE INDEX idx_element_rang_idx1 (fk_parent, parenttype, fk_child, childtype);
+
+	
+ALTER TABLE llx_element_rang ADD INDEX idx_element_rang_fk_parent (fk_parent);
+
+-- Pas de contraite sur fk_parent et fk_child car pointe sur differentes tables
+	
\ No newline at end of file
diff --git a/htdocs/install/mysql/tables/llx_element_rang.sql b/htdocs/install/mysql/tables/llx_element_rang.sql
new file mode 100644
index 00000000000..7e0dbb5dead
--- /dev/null
+++ b/htdocs/install/mysql/tables/llx_element_rang.sql
@@ -0,0 +1,30 @@
+-- ============================================================================
+-- Copyright (C) 2010 Regis Houssin  <regis@dolibarr.fr>
+--
+-- This program is free software; you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program; if not, write to the Free Software
+-- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+--
+-- $Id$
+
+
+create table llx_element_rang
+(
+  rowid           	integer AUTO_INCREMENT PRIMARY KEY,  
+  fk_parent			integer NOT NULL,
+  parenttype		varchar(16) NOT NULL,
+  fk_child			integer NOT NULL,
+  childtype			varchar(16) NOT NULL,
+  rang				integer	DEFAULT 0
+) type=innodb;
+