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-rw-r--r--schemas/relaxng/left-right.rnc2
1 files changed, 2 insertions, 0 deletions
diff --git a/schemas/relaxng/left-right.rnc b/schemas/relaxng/left-right.rnc
index 977fe7d7..1d132443 100644
--- a/schemas/relaxng/left-right.rnc
+++ b/schemas/relaxng/left-right.rnc
@@ -26,6 +26,8 @@ version = "1"
# Top level PDU
start = element msg {
+ attribute version { xsd:positiveInteger { maxInclusive="1" } },
+ ( (attribute type { "query" }, query_elt*) |
(attribute type { "reply" }, reply_elt*) )
}