diff --git a/v3_18_0/CDT-commonTypes-v3_18_0.xsd b/v3_18_0/CDT-commonTypes-v3_18_0.xsd
index e1cfa9d5299a74d2df8cad1ec209e950ffa98fc2..35896d7b52db70dc0e511920e6e15240de53013a 100644
--- a/v3_18_0/CDT-commonTypes-v3_18_0.xsd
+++ b/v3_18_0/CDT-commonTypes-v3_18_0.xsd
@@ -271,9 +271,9 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 	<!-- auxiliary data type required to define "serializations" below -->
 	<xs:simpleType name="permittedMediaTypes"> 
 		<xs:restriction base="m2m:typeOfContent">
-			<xs:enumeration value="application/xml" />
-			<xs:enumeration value="application/json" />
-			<xs:enumeration value="application/cbor" />
+			<xs:enumeration value="xml" />
+			<xs:enumeration value="json" />
+			<xs:enumeration value="cbor" />
 		</xs:restriction>
 	</xs:simpleType>