Fixes to expirationTime and schedule

CDT-commonTypes-v0_8_0.xsd

@@ -179,7 +179,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 		<xs:complexContent>
 			<xs:extension base="m2m:resource">
 				<xs:sequence>
-					<xs:element name="expirationTime" type="xs:dateTime" minOccurs="0" />
+					<xs:element name="expirationTime" type="xs:dateTime" />
 					<xs:element name="announceTo" type="m2m:AnyURIList" minOccurs="0" />
 					<xs:element name="announcedAttribute" minOccurs="0">
 						<xs:simpleType>
@@ -195,7 +195,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 		<xs:complexContent>
 			<xs:extension base="m2m:resource">
 				<xs:sequence>
-					<xs:element name="expirationTime" type="xs:dateTime" minOccurs="0" />
+					<xs:element name="expirationTime" type="xs:dateTime" />
 					<xs:element name="link" type="xs:anyURI" />
 				</xs:sequence>
 			</xs:extension>

CDT-schedule-v0_8_0.xsd

@@ -62,7 +62,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 				<xs:extension base="m2m:announcedSubordinateResource">
 					<xs:sequence>
 						<!-- Resource Specific Attributes -->
-						<xs:element name="scheduleElement">
+						<xs:element name="scheduleElement" minOccurs="0">
 							<xs:complexType>
 								<xs:sequence>
 									<xs:element name="timePeriod" type="m2m:eCrontabList" maxOccurs="unbounded" />