diff --git a/htdocs/install/mysql/tables/llx_commande.sql b/htdocs/install/mysql/tables/llx_commande.sql
index 90e8fd7af7196cf81d15cadfe733c651a4224c23..7bf22df1a1d8e6b0c55d3268d6e4b2b429c770e2 100644
--- a/htdocs/install/mysql/tables/llx_commande.sql
+++ b/htdocs/install/mysql/tables/llx_commande.sql
@@ -40,7 +40,7 @@ create table llx_commande
   fk_user_modif         integer,                       -- user making last change
   fk_user_valid			integer,						-- user validating
   fk_user_cloture		integer,						-- user closing
-  source				smallint,
+  source				smallint,						-- not used, except by setting this to 42 for orders coming for replenishment and 0 in other case ?
   fk_statut				smallint  default 0,
   amount_ht				real      default 0,
   remise_percent		real      default 0,
@@ -64,7 +64,7 @@ create table llx_commande
   date_livraison		date 	  default NULL,
   fk_shipping_method    integer,                        -- shipping method id
   fk_availability		integer NULL,
-  fk_input_reason		integer,
+  fk_input_reason		integer,						-- id coming from c_input_reason, '0' if no defined
   fk_delivery_address	integer,						-- delivery address (deprecated)
   import_key			varchar(14),
   extraparams			varchar(255)					-- for stock other parameters with json format
diff --git a/htdocs/install/mysql/tables/llx_commande_fournisseur.sql b/htdocs/install/mysql/tables/llx_commande_fournisseur.sql
index f9f440d0db4a9bdbaccd815a979035dc458d7f3b..17027e16960615643bfc864a407e35fb9f86d86f 100644
--- a/htdocs/install/mysql/tables/llx_commande_fournisseur.sql
+++ b/htdocs/install/mysql/tables/llx_commande_fournisseur.sql
@@ -41,7 +41,7 @@ create table llx_commande_fournisseur
   fk_user_modif         integer,                       -- user making last change
   fk_user_valid			integer,                       -- user validating
   fk_user_approve		integer,                       -- user approving
-  source				smallint NOT NULL,
+  source				smallint NOT NULL,			-- not used, except by setting this to 42 for orders coming for replenishment and 0 in other case ?
   fk_statut				smallint  default 0,
   amount_ht				real      default 0,
   remise_percent		real      default 0,
@@ -59,7 +59,7 @@ create table llx_commande_fournisseur
   fk_account            integer,                       -- bank account
   fk_cond_reglement		integer,                       -- condition de reglement
   fk_mode_reglement		integer,                       -- mode de reglement
-  fk_input_method	    integer default 0,
+  fk_input_method	    integer default 0,            -- id coming from c_input_reason, '0' if no defined
   import_key			varchar(14),
   extraparams			varchar(255)					-- for stock other parameters with json format