--- modules/damieng/clean_xml/loncapa.xsd	2015/06/22 20:49:55	1.16
+++ modules/damieng/clean_xml/loncapa.xsd	2015/08/12 14:58:57	1.17
@@ -7123,7 +7123,13 @@
           </xs:union>
         </xs:simpleType>
       </xs:attribute>
-      <xs:attribute default="no" name="encrypturl" type="yesno-or-perl"/>
+      <xs:attribute default="no" name="encrypturl" type="yesno-or-perl">
+        <xs:annotation>
+          <xs:documentation>
+            LON-CAPA specific attribute. If set to yes, the file URL will be hidden.
+          </xs:documentation>
+        </xs:annotation>
+      </xs:attribute>
     </xs:complexType>
   </xs:element>
   <xs:element name="figure">