diff --git a/v3_8_0/CDT-timeSeriesInstance-v3_8_0.xsd b/v3_8_0/CDT-timeSeriesInstance-v3_8_0.xsd
index 9eba039555c8eb95ee09eb397a4233d011c1fca4..b00bef9cb1687956da966ae0bf116a3793ab4e14 100644
--- a/v3_8_0/CDT-timeSeriesInstance-v3_8_0.xsd
+++ b/v3_8_0/CDT-timeSeriesInstance-v3_8_0.xsd
@@ -28,6 +28,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 	elementFormDefault="unqualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
 	<xs:include schemaLocation="CDT-commonTypes-v3_8_0.xsd" />
 	<xs:include schemaLocation="CDT-transaction-v3_8_0.xsd"/>
+	<xs:include schemaLocation="CDT-semanticDescriptor-v3_8_0.xsd"/>
 
 	<xs:element name="timeSeriesInstance" substitutionGroup="m2m:sg_announceableSubordinateResource">
 		<xs:complexType>
@@ -45,6 +46,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 							<xs:element name="childResource" type="m2m:childResourceRef" minOccurs="1" maxOccurs="unbounded" />
 							<xs:choice minOccurs="1" maxOccurs="unbounded">
 								<xs:element ref="m2m:transaction" />
+								<xs:element ref="m2m:semanticDescriptor" />
 							</xs:choice>
 						</xs:choice>
 					</xs:sequence>
@@ -68,6 +70,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 							<xs:element name="childResource" type="m2m:childResourceRef" minOccurs="1" maxOccurs="unbounded" />
 							<xs:choice minOccurs="1" maxOccurs="unbounded">
 								<xs:element ref="m2m:transaction" />
+								<xs:element ref="m2m:semanticDescriptor" />
 							</xs:choice>
 						</xs:choice>
 					</xs:sequence>