diff --git a/datamodel.combodo-notify-on-expiration.xml b/datamodel.combodo-notify-on-expiration.xml
index 56c449203..021eaed4e 100644
--- a/datamodel.combodo-notify-on-expiration.xml
+++ b/datamodel.combodo-notify-on-expiration.xml
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.3">
 <!--
  @copyright   Copyright (C) 2010-2019 Combodo SARL
  @license     https://www.combodo.com/documentation/combodo-software-license.html
  -->
-<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.3">
     <classes>
         <class id="ExpirationRule" _delta="define">
             <parent>cmdbAbstractObject</parent>
@@ -29,12 +29,12 @@
                     <default_value/>
                     <is_null_allowed>false</is_null_allowed>
                 </field>
- 				<field id="description" xsi:type="AttributeText">
-					<sql>description</sql>
-					<default_value/>
-					<is_null_allowed>true</is_null_allowed>
-					<format>html</format>
-				</field>
+                <field id="description" xsi:type="AttributeText">
+                    <sql>description</sql>
+                    <default_value/>
+                    <is_null_allowed>true</is_null_allowed>
+                    <format>html</format>
+                </field>
                 <field id="class" xsi:type="AttributeString">
                     <sql>class</sql>
                     <default_value/>
@@ -286,7 +286,7 @@
 		$oBlock->Display($oPage, 'rel_preview_rule_'.$this->GetKey(), $aParams);
 	}]]></code>
                 </method>
-        </methods>
+            </methods>
             <presentation>
                 <list>
                     <items>