diff --git a/servers/slapd/schema/core.schema b/servers/slapd/schema/core.schema
index 6cdae49606..91237cc690 100644
--- a/servers/slapd/schema/core.schema
+++ b/servers/slapd/schema/core.schema
@@ -14,10 +14,10 @@
 # select informational schema items:
 #	RFC2377 (uidObject)
 #
-# select experimental IETF LDAPext/LDUP items
-#   ldapSubentry draft
+# select IETF ''work in progress'' LDAPext/LDUP items
+#   ldapSubentry
 #	ldapRootDSE
-#	named referrals draft
+#	named referrals
 #	alias draft
 
 # Standard X.501(93) Operational Attribute Types from RFC2252
@@ -523,7 +523,7 @@ objectclass ( 1.3.6.1.1.3.1 NAME 'uidObject'
 	SUP top AUXILIARY MUST uid )
 
 #
-# From draft-ietf-ldapext-nameref-00.txt
+# From draft-zeilenga-ldap-nameref-00.txt
 #	used to represent referrals in the directory
 #
 attributetype ( 2.16.840.1.113730.3.1.34 NAME 'ref'
@@ -534,7 +534,7 @@ attributetype ( 2.16.840.1.113730.3.1.34 NAME 'ref'
 
 objectclass ( 2.16.840.1.113730.3.2.6 NAME 'referral'
 	DESC 'Named referral object'
-	SUP top STRUCTURAL MAY ref )
+	SUP top STRUCTURAL MUST ref )
 
 #
 # LDAPsubEntry