diff --git a/CDT-mgmtCmd.xsd b/CDT-mgmtCmd.xsd
index 5b125c64e5e9d2f539d03ec78291f06881bd5baf..8e873108629c8f065ba6cc3571fe85b965eb5f30 100644
--- a/CDT-mgmtCmd.xsd
+++ b/CDT-mgmtCmd.xsd
@@ -49,7 +49,7 @@ 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" />