diff --git a/v2_26_0/CDT-commonTypes-v2_26_0.xsd b/v2_26_0/CDT-commonTypes-v2_26_0.xsd
index 25c552abbab9347d74996be0c5bb8e738ba2c1e7..2895e5b797eecda4f96259c1a58b31c125e3958b 100644
--- a/v2_26_0/CDT-commonTypes-v2_26_0.xsd
+++ b/v2_26_0/CDT-commonTypes-v2_26_0.xsd
@@ -1033,7 +1033,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 	<xs:complexType name="dynAuthDasRequest">
 		<xs:sequence>
 			<xs:element name="originator" type="m2m:ID" minOccurs="1" />
-			<xs:element name="targetedResourceType" type="m2m:resourceType" minOccurs="1" />
+			<xs:element name="targetedResourceType" type="m2m:resourceType" minOccurs="0" />
 			<xs:element name="operation" type="m2m:operation" minOccurs="1" />
 			<xs:element name="originatorIP" minOccurs="0" >
 				<xs:complexType>
@@ -1055,7 +1055,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 				</xs:simpleType>
 			</xs:element>            
 			<xs:element name="requestTimestamp" type="m2m:absRelTimestamp" minOccurs="0" />
-			<xs:element name="targetedResourceID" type="xs:anyURI" minOccurs="0" />
+			<xs:element name="targetedResourceID" type="xs:anyURI" minOccurs="1" />
 			<xs:element name="proposedPrivilegesLifetime" type="m2m:absRelTimestamp" minOccurs="0" />
 			<xs:element name="roleIDsFromACPs"  minOccurs="0" >
 				<xs:simpleType>
diff --git a/v2_26_0/CDT-timeSeries-v2_26_0.xsd b/v2_26_0/CDT-timeSeries-v2_26_0.xsd
index 44aadd7ffe534c185e4252920b2d2bde08d7f239..c9d33c88b63e99a74450117b0bc09ffe4c2e619f 100644
--- a/v2_26_0/CDT-timeSeries-v2_26_0.xsd
+++ b/v2_26_0/CDT-timeSeries-v2_26_0.xsd
@@ -38,7 +38,7 @@ 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" />