diff --git a/plugins/cffadaptor/src/UBCFFAdaptor.cpp b/plugins/cffadaptor/src/UBCFFAdaptor.cpp
index 10a8aca5..39652710 100644
--- a/plugins/cffadaptor/src/UBCFFAdaptor.cpp
+++ b/plugins/cffadaptor/src/UBCFFAdaptor.cpp
@@ -1085,7 +1085,9 @@ bool UBCFFAdaptor::UBToCFFConverter::setContentFromUBZ(const QDomElement &ubzEle
         if (bRet)
         {
             svgElement.setAttribute(aSVGHref, sDstContentFolder+"/"+sDstFileName);
-            svgElement.setAttribute(aSVGRequiredExtension, svgRequiredExtensionPrefix+convertExtention(fileExtention));
+            // NOT by standard! Enable it later!
+            // validator http://validator.imsglobal.org/iwb/index.jsp?validate=package
+            //svgElement.setAttribute(aSVGRequiredExtension, svgRequiredExtensionPrefix+convertExtention(fileExtention));
         }
     }
     else
@@ -1112,7 +1114,9 @@ bool UBCFFAdaptor::UBToCFFConverter::setContentFromUBZ(const QDomElement &ubzEle
             if (bRet)
             {
                 svgElement.setAttribute(aSVGHref, sDstContentFolder+"/"+sDstFileName);
-                svgElement.setAttribute(aSVGRequiredExtension, svgRequiredExtensionPrefix+fePng);
+                // NOT by standard! Enable it later!
+                // validator http://validator.imsglobal.org/iwb/index.jsp?validate=package
+                //svgElement.setAttribute(aSVGRequiredExtension, svgRequiredExtensionPrefix+fePng);
             }
         }
     }else
diff --git a/plugins/cffadaptor/src/UBCFFConstants.h b/plugins/cffadaptor/src/UBCFFConstants.h
index 3243f72f..adeeb507 100644
--- a/plugins/cffadaptor/src/UBCFFConstants.h
+++ b/plugins/cffadaptor/src/UBCFFConstants.h
@@ -106,7 +106,7 @@ const QString ubNS = "http://uniboard.mnemis.com/document";
 const QString svgUBZNS = "http://www.imsglobal.org/xsd/iwb_v1p0";
 const QString svgIWBNS = "http://www.w3.org/2000/svg";
 const QString xlinkNS = "http://www.w3.org/1999/xlink";
-const QString iwbNS = "http://www.becta.org.uk/iwb";
+const QString iwbNS = "http://www.imsglobal.org/xsd/iwb_v1p0";
 const QString xsiNS = "http://www.w3.org/2001/XMLSchema-instance";
 const QString xsiShemaLocation = "\
 http://www.imsglobal.org/xsd/iwb_v1p0 \