1 files changed, 12 insertions, 2 deletions
diff --git a/schemas/relaxng/rrdp.rnc b/schemas/relaxng/rrdp.rnc
index 5b47c90b..2829605d 100644
--- a/schemas/relaxng/rrdp.rnc
+++ b/schemas/relaxng/rrdp.rnc
@@ -61,11 +61,21 @@ start |= element deltas {
   attribute to         { serial },
   element delta {
     attribute serial   { serial },
-    ( element publish  { attribute uri { uri }, base64 } |
-      element withdraw { attribute uri { uri }         } )+
+    delta_element+
   }+
 }
 
+delta_element |= element publish  {
+  attribute uri  { uri },
+  attribute hash { hash }?,
+  base64
+}
+
+delta_element |= element withdraw {
+  attribute uri  { uri },
+  attribute hash { hash }
+}
+
 # Local Variables:
 # indent-tabs-mode: nil
 # comment-start: "# "