diff --git a/bin/import_xml.rng b/bin/import_xml.rng
index 3a698f4a897..2ddc2336cc0 100644
--- a/bin/import_xml.rng
+++ b/bin/import_xml.rng
@@ -201,6 +201,9 @@
             <rng:optional> <rng:attribute name="target"/> </rng:optional>
             <rng:optional> <rng:attribute name="key2"/> </rng:optional>
             <rng:optional> <rng:attribute name="groups"/> </rng:optional>
+            <rng:optional> <rng:attribute name="limit"/> </rng:optional>
+            <rng:optional> <rng:attribute name="usage"/> </rng:optional>
+            <rng:optional> <rng:attribute name="auto_refresh"/> </rng:optional>
             <rng:empty />
         </rng:element>
     </rng:define>