Update testing/dependencies/xsd/ts_103120_Core.xsd

            <xs:element name="Payload" type="MessagePayload"/>

            <xs:element name="Signature" minOccurs="0"/>

            <!-- Use of the Signature element is discouraged – implementers are encouraged use the digsig:Signature element below instead -->

            <xs:element ref="digsig:Signature" minOccurs="0"/>

            <!-- <xs:element ref="digsig:Signature" minOccurs="0"/> -->

        </xs:sequence>

    </xs:complexType>

    <xs:complexType name="MessageHeader">