diff --git a/v3_28_0/CDT-AE-v3_28_0.xsd b/v3_28_0/CDT-AE-v3_28_0.xsd
index 91ac79ed4d9aa0bfe90773f1553c59ee0afe1d27..96140cf70b5acd715b64cae2fbaacb77759e7573 100644
--- a/v3_28_0/CDT-AE-v3_28_0.xsd
+++ b/v3_28_0/CDT-AE-v3_28_0.xsd
@@ -64,6 +64,8 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 						<xs:element name="sessionCapabilities" type="m2m:sessionCapabilities" minOccurs="0" />
 						<xs:element name="triggerEnable" type="xs:boolean" minOccurs="0" />
 						<xs:element name="activityPatternElements" type="m2m:activityPatternElements" minOccurs="0" />
+						<xs:element name="trigger-Recipient-ID" type="m2m:triggerRecipientID" minOccurs="0" />
+						<xs:element name="triggerReferenceNumber" type="xs:unsignedInt" minOccurs="0" />
 
 						<!-- Child Resources -->
 						<xs:choice minOccurs="0" maxOccurs="1">
@@ -113,6 +115,8 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 						<xs:element name="sessionCapabilities" type="m2m:sessionCapabilities" minOccurs="0" />
 						<xs:element name="triggerEnable" type="xs:boolean" minOccurs="0" />
 						<xs:element name="activityPatternElements" type="m2m:activityPatternElements" minOccurs="0" />
+						<xs:element name="trigger-Recipient-ID" type="m2m:triggerRecipientID" minOccurs="0" />
+						<xs:element name="triggerReferenceNumber" type="xs:unsignedInt" minOccurs="0" />
 
 						<!-- Child Resources -->
 						<xs:choice minOccurs="0" maxOccurs="1">