diff --git a/CDT-enumerationTypes.xsd b/CDT-enumerationTypes.xsd
index 00f337d4e8ce7ecc8860f3b76856495d711d298d..3bbe8412aa26cc7ad64021b9e96e3a99d62f4d9e 100644
--- a/CDT-enumerationTypes.xsd
+++ b/CDT-enumerationTypes.xsd
@@ -295,7 +295,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 			<xs:enumeration value="4104" />              
 			<!-- CONFLICT                  -->
 			<xs:enumeration value="4105" />      
-			<!-- ORIGINATOR_HAS_NOT_REGISTERED -->
+			<!-- ORIGINATOR_NOT_AUTHENTICATED -->
 			<xs:enumeration value="4106" /> 
 			<!-- SECURITY_ASSOCIATION_REQUIRED -->
 			<xs:enumeration value="4107" /> 
@@ -436,7 +436,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 			<xs:enumeration value="9" />
 			<!-- locationPolicy --> 
 			<xs:enumeration value="10" />
-			<!-- m2mServiceSubscription -->
+			<!-- m2mServiceSubscriptionProfile -->
 			<xs:enumeration value="11" />
 			<!-- mgmtCmd -->
 			<xs:enumeration value="12" />
diff --git a/CDT-mgmtCmd.xsd b/CDT-mgmtCmd.xsd
index 8c341be7967b080ce67e6fb9f2aba65d10e2253f..437180e33b7f42d3bafbcda78adbe5f5372c570b 100644
--- a/CDT-mgmtCmd.xsd
+++ b/CDT-mgmtCmd.xsd
@@ -48,7 +48,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 						<xs:element name="execNumber" type="xs:nonNegativeInteger" minOccurs="0" />
 
 						<!-- Child Resources -->
-						<xs:choice minOccurs="1" maxOccurs="1">
+						<xs:choice minOccurs="0" maxOccurs="1">
 							<xs:element name="childResource" type="m2m:childResourceRef" minOccurs="1" maxOccurs="unbounded" />
 							<xs:choice minOccurs="1" maxOccurs="unbounded">
 								<xs:element ref="m2m:execInstance" />
diff --git a/CDT-notification.xsd b/CDT-notification.xsd
index 1db25125e1f059a0624a1e4edf997dc7b55aa4fc..29dfd6f5a06c90ffa337354e5329cddf5c8c294b 100644
--- a/CDT-notification.xsd
+++ b/CDT-notification.xsd
@@ -58,7 +58,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
                         </xs:element>                      
                     <xs:element name="verificationRequest" type="xs:boolean" minOccurs="0"/>
                     <xs:element name="subscriptionDeletion" type="xs:boolean" minOccurs="0"/>
-                    <xs:element name="subscriptionReference" type="xs:anyURI" minOccurs="0"/>
+                    <xs:element name="subscriptionReference" type="xs:anyURI" />
                     <xs:element name="creator" type="m2m:ID" minOccurs="0"/>
                     <xs:element name="notificationForwardingURI" type="xs:anyURI" minOccurs="0"/>
                     <xs:element name="notificationTarget" type="m2m:ID" minOccurs="0"/>