diff --git a/htdocs/contact/class/contact.class.php b/htdocs/contact/class/contact.class.php
index d7d95de2795..1c34a64f986 100644
--- a/htdocs/contact/class/contact.class.php
+++ b/htdocs/contact/class/contact.class.php
@@ -37,6 +37,9 @@ require_once DOL_DOCUMENT_ROOT .'/core/class/commonobject.class.php';
  */
 class Contact extends CommonObject
 {
+	/**
+	 * @var string ID to identify managed object
+	 */
 	public $element='contact';
 	
 	/**
diff --git a/htdocs/contrat/class/contrat.class.php b/htdocs/contrat/class/contrat.class.php
index b857cad8e2e..13a52ac22ef 100644
--- a/htdocs/contrat/class/contrat.class.php
+++ b/htdocs/contrat/class/contrat.class.php
@@ -41,6 +41,9 @@ require_once DOL_DOCUMENT_ROOT . '/margin/lib/margins.lib.php';
  */
 class Contrat extends CommonObject
 {
+	/**
+	 * @var string ID to identify managed object
+	 */
 	public $element='contrat';
 	
 	/**
@@ -2458,7 +2461,10 @@ class Contrat extends CommonObject
  */
 class ContratLigne extends CommonObjectLine
 {
-    public $element='contratdet';
+    /**
+	 * @var string ID to identify managed object
+	 */
+	public $element='contratdet';
     
     /**
 	 * @var string Name of table without prefix where object is stored
diff --git a/htdocs/core/class/comment.class.php b/htdocs/core/class/comment.class.php
index cad33316b68..027d3193031 100644
--- a/htdocs/core/class/comment.class.php
+++ b/htdocs/core/class/comment.class.php
@@ -4,7 +4,10 @@
  */
 class Comment extends CommonObject
 {
-	public $element='comment';		//!< Id that identify managed objects
+	/**
+	 * @var string ID to identify managed object
+	 */
+	public $element='comment';
 	
 	/**
 	 * @var string Name of table without prefix where object is stored
diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 97ba1f814d0..6db2388ce8c 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -64,7 +64,7 @@ abstract class CommonObject
 	public $errors=array();
 	
 	/**
-	 * @var string
+	 * @var string ID to identify managed object
 	 */
 	public $element;
 	
diff --git a/htdocs/core/class/events.class.php b/htdocs/core/class/events.class.php
index 7f77f99f183..bbdf7e9c3ab 100644
--- a/htdocs/core/class/events.class.php
+++ b/htdocs/core/class/events.class.php
@@ -34,7 +34,10 @@
  */
 class Events // extends CommonObject
 {
-	public $element='events';				//!< Id that identify managed objects
+	/**
+	 * @var string ID to identify managed object
+	 */
+	public $element='events';
 	
 	/**
 	 * @var string Name of table without prefix where object is stored
diff --git a/htdocs/core/class/fiscalyear.class.php b/htdocs/core/class/fiscalyear.class.php
index 640ad2ed5ac..8e6f389200b 100644
--- a/htdocs/core/class/fiscalyear.class.php
+++ b/htdocs/core/class/fiscalyear.class.php
@@ -28,6 +28,9 @@ require_once DOL_DOCUMENT_ROOT .'/core/class/commonobject.class.php';
  */
 class Fiscalyear extends CommonObject
 {
+	/**
+	 * @var string ID to identify managed object
+	 */
 	public $element='fiscalyear';
 	
 	/**
diff --git a/htdocs/core/class/link.class.php b/htdocs/core/class/link.class.php
index 4896a1919d7..0d695baaf8d 100644
--- a/htdocs/core/class/link.class.php
+++ b/htdocs/core/class/link.class.php
@@ -28,7 +28,10 @@ require_once DOL_DOCUMENT_ROOT.'/core/class/commonobject.class.php';
  */
 class Link extends CommonObject
 {
-    public $element = 'link';
+    /**
+	 * @var string ID to identify managed object
+	 */
+	public $element = 'link';
     
     /**
 	 * @var string Name of table without prefix where object is stored
diff --git a/htdocs/cron/class/cronjob.class.php b/htdocs/cron/class/cronjob.class.php
index 88d9fc706e1..b898b4eb238 100644
--- a/htdocs/cron/class/cronjob.class.php
+++ b/htdocs/cron/class/cronjob.class.php
@@ -30,7 +30,10 @@ require_once DOL_DOCUMENT_ROOT."/core/class/commonobject.class.php";
  */
 class Cronjob extends CommonObject
 {
-	public $element='cronjob';			//!< Id that identify managed objects
+	/**
+	 * @var string ID to identify managed object
+	 */
+	public $element='cronjob';
 	
 	/**
 	 * @var string Name of table without prefix where object is stored