diff --git a/v3_23_0/CDT-commonTypes-v3_23_0.xsd b/v3_23_0/CDT-commonTypes-v3_23_0.xsd
index ca6accb53a5a6481104ad0a8082e15a9f90fe388..3e66105807193bb438053a852ed0eab8d612bbb0 100644
--- a/v3_23_0/CDT-commonTypes-v3_23_0.xsd
+++ b/v3_23_0/CDT-commonTypes-v3_23_0.xsd
@@ -615,7 +615,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
<xs:element name="sizeBelow" type="xs:positiveInteger" minOccurs="0" />
<xs:element name="operationMonitor" type="m2m:operationMonitor" minOccurs="0" maxOccurs="unbounded" />
<xs:element name="attribute" type="m2m:attributeList" minOccurs="0" maxOccurs="1" />
- <xs:element name="notificationEventType" type="m2m:notificationEventType" minOccurs="0" maxOccurs="6" />
+ <xs:element name="notificationEventType" type="m2m:notificationEventType" minOccurs="0" maxOccurs="5" />
<xs:element name="childResourceType" minOccurs="0" maxOccurs="1" >
<xs:simpleType>
<xs:restriction>
diff --git a/v3_23_0/CDT-enumerationTypes-v3_23_0.xsd b/v3_23_0/CDT-enumerationTypes-v3_23_0.xsd
index 0ef043354849b33bbba2202d7af6f0efdfd59177..5d2dba11b01456ec5c0dbe275643d3054512a3d4 100644
--- a/v3_23_0/CDT-enumerationTypes-v3_23_0.xsd
+++ b/v3_23_0/CDT-enumerationTypes-v3_23_0.xsd
@@ -816,6 +816,8 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
<xs:enumeration value="3" />
<!-- Trigger Payload -->
<xs:enumeration value="4" />
+ <!-- Timeseries notification -->
+ <xs:enumeration value="5" />
</xs:restriction>
</xs:simpleType>
@@ -840,6 +842,8 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
<xs:enumeration value="6" />
<!-- Blocking_Update -->
<xs:enumeration value="7" />
+ <!-- Report_on_Missing_Data_Points -->
+ <xs:enumeration value="8" />
</xs:restriction>
</xs:simpleType>
diff --git a/v3_23_0/CDT-notification-v3_23_0.xsd b/v3_23_0/CDT-notification-v3_23_0.xsd
index debb9344a1267900d82a5719fcd4731d9bb1508b..fd5d88b343bfd88734cb750b29c040b883fe1d48 100644
--- a/v3_23_0/CDT-notification-v3_23_0.xsd
+++ b/v3_23_0/CDT-notification-v3_23_0.xsd
@@ -52,7 +52,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
</xs:sequence>
</xs:complexType>
</xs:element>
- <xs:element name="notificationEventType" type="m2m:notificationEventType" minOccurs="0"/>
+ <xs:element name="notificationEventType" type="m2m:notificationEventType"/>
</xs:sequence>
</xs:complexType>
</xs:element>
diff --git a/v3_23_0/CDT-timeSeriesNotification-v3_23_0.xsd b/v3_23_0/CDT-timeSeriesNotification-v3_23_0.xsd
new file mode 100644
index 0000000000000000000000000000000000000000..cd0e35f8d6f122e12ce67c9a4491ec9b33cc24b4
--- /dev/null
+++ b/v3_23_0/CDT-timeSeriesNotification-v3_23_0.xsd
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright Notification
+
+The oneM2M Partners authorize you to copy this document, or any components thereof, provided that you retain all copyright and other proprietary notices
+contained in the original materials on any copies of the materials and that you comply strictly with these terms.
+This copyright permission does not constitute an endorsement of the products or services, nor does it encompass the granting of
+any patent rights. The oneM2M Partners assume no responsibility for errors or omissions in this document.
+© 2021, oneM2M Partners Type 1 (ARIB, ATIS, CCSA, ETSI, TIA, TSDSI, TTA, TTC). All rights reserved.
+
+
+Notice of Disclaimer & Limitation of Liability
+
+The information provided in this document is directed solely to professionals who have the appropriate degree of experience to understand
+and interpret its contents in accordance with generally accepted engineering or other professional standards and applicable regulations.
+No recommendation as to products or vendors is made or should be implied.
+
+NO REPRESENTATION OR WARRANTY IS MADE THAT THE INFORMATION IS TECHNICALLY ACCURATE OR SUFFICIENT OR CONFORMS TO ANY STATUTE,
+GOVERNMENTAL RULE OR REGULATION, AND FURTHER, NO REPRESENTATION OR WARRANTY IS MADE OF MERCHANTABILITY OR FITNESS FOR ANY
+PARTICULAR PURPOSE OR AGAINST INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS.
+NO oneM2M PARTNER TYPE 1 SHALL BE LIABLE, BEYOND THE AMOUNT OF ANY SUM RECEIVED IN PAYMENT BY THAT PARTNER FOR THIS DOCUMENT, WITH RESPECT TO
+ANY CLAIM, AND IN NO EVENT SHALL oneM2M BE LIABLE FOR LOST PROFITS OR OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES.
+oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PROVIDED IN THIS DOCUMENT IS AT THE RISK OF THE USER.
+
+-->
+
+<xs:schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.onem2m.org/xml/protocols"
+ xmlns:m2m="http://www.onem2m.org/xml/protocols" elementFormDefault="unqualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
+
+ <xs:include schemaLocation="CDT-commonTypes-v3_23_0.xsd" />
+
+ <xs:element name="timeSeriesNotification">
+ <xs:complexType>
+ <xs:sequence>
+ <xs:element name="missingDataList" type="m2m:missingDataList"/>
+ <xs:element name="missingDataCurrentNr" type="xs:nonNegativeInteger"/>
+ </xs:sequence>
+ </xs:complexType>
+ </xs:element>
+
+</xs:schema>
+