diff --git a/v3_16_0/CDT-timeSeries-v3_16_0.xsd b/v3_16_0/CDT-timeSeries-v3_16_0.xsd
index e220bd47606b485e1388a640f576c22275fbc21f..ed0834342600b33d3c002e7b6873c5ab836c8c62 100644
--- a/v3_16_0/CDT-timeSeries-v3_16_0.xsd
+++ b/v3_16_0/CDT-timeSeries-v3_16_0.xsd
@@ -39,7 +39,8 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 				<xs:extension base="m2m:announceableResource">
 					<xs:sequence>
 						<!-- Common Attribute, specific to <container>, <contentInstance>, <request> and <delivery> and other resources -->
-						<xs:element name="creator" type="m2m:ID" />
+						<xs:element name="creator" type="m2m:ID" minOccurs="0" />
+						
 						<!-- Resource Specific Attributes -->
 						<xs:element name="maxNrOfInstances" type="xs:nonNegativeInteger" minOccurs="0" />
 						<xs:element name="maxByteSize" type="xs:nonNegativeInteger" minOccurs="0" />