diff --git a/htdocs/fichinter/class/fichinter.class.php b/htdocs/fichinter/class/fichinter.class.php
index 59d4ecabad1..40ca5862df0 100644
--- a/htdocs/fichinter/class/fichinter.class.php
+++ b/htdocs/fichinter/class/fichinter.class.php
@@ -45,7 +45,11 @@ class Fichinter extends CommonObject
 	 */
 	public $table_element='fichinter';
 
+	/**
+	 * @var int Field with ID of parent key if this field has a parent
+	 */
 	public $fk_element='fk_fichinter';
+
 	public $table_element_line='fichinterdet';
 	public $picto = 'intervention';
 
@@ -54,28 +58,28 @@ class Fichinter extends CommonObject
 	 */
 	protected $table_ref_field = 'ref';
 
-	var $socid;		// Id client
+	public $socid;		// Id client
 
-	var $author;
-	var $datec;
-	var $datev;
-	var $dateo;
-	var $datee;
-	var $datet;
-	var $datem;
-	var $duration;
-	var $statut = 0;		// 0=draft, 1=validated, 2=invoiced, 3=Terminate
+	public $author;
+	public $datec;
+	public $datev;
+	public $dateo;
+	public $datee;
+	public $datet;
+	public $datem;
+	public $duration;
+	public $statut = 0;		// 0=draft, 1=validated, 2=invoiced, 3=Terminate
 
 	/**
 	 * @var string description
 	 */
 	public $description;
 
-	var $fk_contrat = 0;
-	var $fk_project = 0;
-	var $extraparams=array();
+	public $fk_contrat = 0;
+	public $fk_project = 0;
+	public $extraparams=array();
 
-	var $lines = array();
+	public $lines = array();
 
 	/**
 	 * Draft status
@@ -1332,11 +1336,11 @@ class FichinterLigne extends CommonObjectLine
 	public $error='';
 
 	// From llx_fichinterdet
-	var $fk_fichinter;
-	var $desc;          	// Description ligne
-	var $datei;           // Date intervention
-	var $duration;        // Duree de l'intervention
-	var $rang = 0;
+	public $fk_fichinter;
+	public $desc;          	// Description ligne
+	public $datei;           // Date intervention
+	public $duration;        // Duree de l'intervention
+	public $rang = 0;
 
 	/**
 	 * @var string ID to identify managed object
@@ -1348,6 +1352,9 @@ class FichinterLigne extends CommonObjectLine
 	 */
 	public $table_element='fichinterdet';
 
+	/**
+	 * @var int Field with ID of parent key if this field has a parent
+	 */
 	public $fk_element='fk_fichinter';
 
 	/**
diff --git a/htdocs/fourn/class/fournisseur.commande.class.php b/htdocs/fourn/class/fournisseur.commande.class.php
index 9ea7febfbd9..b2c05eb4253 100644
--- a/htdocs/fourn/class/fournisseur.commande.class.php
+++ b/htdocs/fourn/class/fournisseur.commande.class.php
@@ -51,7 +51,12 @@ class CommandeFournisseur extends CommonOrder
 	public $table_element='commande_fournisseur';
 
     public $table_element_line = 'commande_fournisseurdet';
-    public $fk_element = 'fk_commande';
+
+    /**
+	 * @var int Field with ID of parent key if this field has a parent
+	 */
+	public $fk_element = 'fk_commande';
+
     public $picto='order';
 
     /**
diff --git a/htdocs/fourn/class/fournisseur.facture.class.php b/htdocs/fourn/class/fournisseur.facture.class.php
index 1eece0f0316..2f50e9ac137 100644
--- a/htdocs/fourn/class/fournisseur.facture.class.php
+++ b/htdocs/fourn/class/fournisseur.facture.class.php
@@ -52,7 +52,12 @@ class FactureFournisseur extends CommonInvoice
     public $table_element='facture_fourn';
 
     public $table_element_line='facture_fourn_det';
-    public $fk_element='fk_facture_fourn';
+
+    /**
+	 * @var int Field with ID of parent key if this field has a parent
+	 */
+	public $fk_element='fk_facture_fourn';
+
     public $picto='bill';
 
     /**
diff --git a/htdocs/hrm/class/establishment.class.php b/htdocs/hrm/class/establishment.class.php
index 90b06d9fd0f..7cd7eff5d68 100644
--- a/htdocs/hrm/class/establishment.class.php
+++ b/htdocs/hrm/class/establishment.class.php
@@ -39,7 +39,12 @@ class Establishment extends CommonObject
 	public $table_element='establishment';
 
 	public $table_element_line = '';
+
+	/**
+	 * @var int Field with ID of parent key if this field has a parent
+	 */
 	public $fk_element = 'fk_establishment';
+
 	public $ismultientitymanaged = 1;	// 0=No test on entity, 1=Test with field entity, 2=Test with link by societe
     public $picto='building';
 
diff --git a/htdocs/livraison/class/livraison.class.php b/htdocs/livraison/class/livraison.class.php
index eaa999882cf..8b8236e62e9 100644
--- a/htdocs/livraison/class/livraison.class.php
+++ b/htdocs/livraison/class/livraison.class.php
@@ -44,6 +44,9 @@ class Livraison extends CommonObject
 	 */
 	public $element="delivery";
 
+	/**
+	 * @var int Field with ID of parent key if this field has a parent
+	 */
 	public $fk_element="fk_livraison";
 
 	/**
@@ -53,14 +56,14 @@ class Livraison extends CommonObject
 
 	public $table_element_line="livraisondet";
 
-	var $brouillon;
-	var $socid;
-	var $ref_customer;
+	public $brouillon;
+	public $socid;
+	public $ref_customer;
 
-	var $date_delivery;    // Date really received
-	var $date_creation;
-	var $date_valid;
-	var $model_pdf;
+	public $date_delivery;    // Date really received
+	public $date_creation;
+	public $date_valid;
+	public $model_pdf;
 
 	/**
 	 * Constructor
diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index ebb40516636..57a969cb924 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -53,7 +53,11 @@ class Product extends CommonObject
 	 */
 	public $table_element='product';
 
+	/**
+	 * @var int Field with ID of parent key if this field has a parent
+	 */
 	public $fk_element='fk_product';
+
 	protected $childtables=array('supplier_proposaldet', 'propaldet','commandedet','facturedet','contratdet','facture_fourn_det','commande_fournisseurdet');    // To test if we can delete object
 	public $ismultientitymanaged = 1;	// 0=No test on entity, 1=Test with field entity, 2=Test with link by societe
 
diff --git a/htdocs/projet/class/project.class.php b/htdocs/projet/class/project.class.php
index cf706f47e44..48e322b3a3e 100644
--- a/htdocs/projet/class/project.class.php
+++ b/htdocs/projet/class/project.class.php
@@ -44,7 +44,12 @@ class Project extends CommonObject
 	public $table_element = 'projet';
 
     public $table_element_line = 'projet_task';
-    public $fk_element = 'fk_projet';
+
+    /**
+	 * @var int Field with ID of parent key if this field has a parent
+	 */
+	public $fk_element = 'fk_projet';
+
     public $ismultientitymanaged = 1;  // 0=No test on entity, 1=Test with field entity, 2=Test with link by societe
     public $picto = 'projectpub';
 
diff --git a/htdocs/projet/class/task.class.php b/htdocs/projet/class/task.class.php
index 6cd128380e5..be72fafc261 100644
--- a/htdocs/projet/class/task.class.php
+++ b/htdocs/projet/class/task.class.php
@@ -41,7 +41,11 @@ class Task extends CommonObject
 	 */
 	public $table_element='projet_task';
 
+	/**
+	 * @var int Field with ID of parent key if this field has a parent
+	 */
 	public $fk_element='fk_task';
+
 	public $picto = 'task';
 	protected $childtables=array('projet_task_time');    // To test if we can delete object
 
diff --git a/htdocs/societe/class/societe.class.php b/htdocs/societe/class/societe.class.php
index 19e87aeb5af..3eb85ff9365 100644
--- a/htdocs/societe/class/societe.class.php
+++ b/htdocs/societe/class/societe.class.php
@@ -51,7 +51,11 @@ class Societe extends CommonObject
 	 */
 	public $table_element = 'societe';
 
+	/**
+	 * @var int Field with ID of parent key if this field has a parent
+	 */
 	public $fk_element='fk_soc';
+
 	public $fieldsforcombobox='nom,name_alias';
 	protected $childtables=array("supplier_proposal"=>'SupplierProposal',"propal"=>'Proposal',"commande"=>'Order',"facture"=>'Invoice',"facture_rec"=>'RecurringInvoiceTemplate',"contrat"=>'Contract',"fichinter"=>'Fichinter',"facture_fourn"=>'SupplierInvoice',"commande_fournisseur"=>'SupplierOrder',"projet"=>'Project',"expedition"=>'Shipment',"prelevement_lignes"=>'DirectDebitRecord');    // To test if we can delete object
 	protected $childtablesoncascade=array("societe_prices", "societe_log", "societe_address", "product_fournisseur_price", "product_customer_price_log", "product_customer_price", "socpeople", "adherent", "societe_rib", "societe_remise", "societe_remise_except", "societe_commerciaux", "categorie", "notify", "notify_def", "actioncomm");