diff --git a/datamodels/2.x/authent-cas/datamodel.authent-cas.xml b/datamodels/2.x/authent-cas/datamodel.authent-cas.xml
index 53e33d3c2..66c7f4d1f 100644
--- a/datamodels/2.x/authent-cas/datamodel.authent-cas.xml
+++ b/datamodels/2.x/authent-cas/datamodel.authent-cas.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<itop_design version="1.7">
+<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.7">
   <constants>
   </constants>
   <classes>
diff --git a/datamodels/2.x/itop-files-information/datamodel.itop-files-information.xml b/datamodels/2.x/itop-files-information/datamodel.itop-files-information.xml
index dea312811..9f8b6b979 100644
--- a/datamodels/2.x/itop-files-information/datamodel.itop-files-information.xml
+++ b/datamodels/2.x/itop-files-information/datamodel.itop-files-information.xml
@@ -1,3 +1,3 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<itop_design version="1.7">
+<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.7">
 </itop_design>
diff --git a/datamodels/2.x/itop-full-itil/datamodel.itop-full-itil.xml b/datamodels/2.x/itop-full-itil/datamodel.itop-full-itil.xml
index dcb52de72..bbf524631 100644
--- a/datamodels/2.x/itop-full-itil/datamodel.itop-full-itil.xml
+++ b/datamodels/2.x/itop-full-itil/datamodel.itop-full-itil.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<itop_design version="1.6">
+<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.7">
 	<classes>
 		<class id="Ticket">
 			<methods>
diff --git a/datamodels/2.x/itop-hub-connector/datamodel.itop-hub-connector.xml b/datamodels/2.x/itop-hub-connector/datamodel.itop-hub-connector.xml
index b42bf8c9d..4f5406bde 100644
--- a/datamodels/2.x/itop-hub-connector/datamodel.itop-hub-connector.xml
+++ b/datamodels/2.x/itop-hub-connector/datamodel.itop-hub-connector.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<itop_design version="1.7">
+<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.7">
   <constants>
   </constants>
   <classes>
diff --git a/datamodels/2.x/itop-portal/datamodel.itop-portal.xml b/datamodels/2.x/itop-portal/datamodel.itop-portal.xml
index 7227a6a3b..346fb043c 100644
--- a/datamodels/2.x/itop-portal/datamodel.itop-portal.xml
+++ b/datamodels/2.x/itop-portal/datamodel.itop-portal.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<itop_design version="1.7">
+<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.7">
 	<portals>
 		<portal id="itop-portal" _delta="define"><!-- ID must match module_design[id] -->
 			<url>pages/exec.php?exec_module=itop-portal-base&amp;exec_page=index.php&amp;portal_id=itop-portal</url><!-- portal_id must match module_design[id] -->
diff --git a/datamodels/2.x/itop-profiles-itil/datamodel.itop-profiles-itil.xml b/datamodels/2.x/itop-profiles-itil/datamodel.itop-profiles-itil.xml
index 2ed01d8d4..90afc7ea0 100755
--- a/datamodels/2.x/itop-profiles-itil/datamodel.itop-profiles-itil.xml
+++ b/datamodels/2.x/itop-profiles-itil/datamodel.itop-profiles-itil.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<itop_design version="1.6">
+<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.7">
   <classes/>
   <user_rights>
     <groups>