diff --git a/v2_9_0/CDT-timeSeries-v2_9_0.xsd b/v2_9_0/CDT-timeSeries-v2_9_0.xsd
index b277bc7efbf0439fc302a93310739f6e7b3bc10f..7775a260d7c648065888173df022a5b313048658 100644
--- a/v2_9_0/CDT-timeSeries-v2_9_0.xsd
+++ b/v2_9_0/CDT-timeSeries-v2_9_0.xsd
@@ -54,9 +54,6 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 						<xs:element name="missingDataDetectTimer" type="xs:nonNegativeInteger" minOccurs="0" />						
 						<xs:element name="ontologyRef" type="xs:anyURI" minOccurs="0" /> 
 
-						<!-- Child Resources -->
-						<xs:element name="latest" type="xs:anyURI" />
-						<xs:element name="oldest" type="xs:anyURI" />
 						<xs:choice minOccurs="0" maxOccurs="1">
 							<xs:element name="childResource" type="m2m:childResourceRef" minOccurs="1" maxOccurs="unbounded" />
 							<xs:choice minOccurs="1" maxOccurs="unbounded">