<xsd:element name="Identification">
    <xsd:annotation>
        <xsd:documentation xml:lang="en">Attributes that uniquely identify the message.</xsd:documentation>
    </xsd:annotation>
    <xsd:complexType>
        <xsd:attribute name="timeStamp" type="xsd:dateTime" use="required">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">The creation date and time of the message in UTC in ISO 8601 format (YYYY-MM-DDThh:mm:ssZ). Source: http://bit.ly/OTA2_ISO8601</xsd:documentation>
            </xsd:annotation>
        </xsd:attribute>
        <xsd:attribute name="messageID" type="String_Short" use="optional">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">A reference for additional message identification, assigned by the requesting system. When a request message includes an echo token the corresponding response message MUST include an echo token with an identical value.</xsd:documentation>
            </xsd:annotation>
        </xsd:attribute>
        <xsd:attribute name="correlationID" type="String_Medium" use="optional">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">A unique identifier that may be specified to relate all messages within a transaction (e.g. this would be sent in all request and response messages that are part of an on-going transaction).</xsd:documentation>
            </xsd:annotation>
        </xsd:attribute>
        <xsd:attribute name="sequenceNbr" type="xsd:nonNegativeInteger" use="optional">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">A sequence number for the transaction assigned by the sending system that allows for an application to process messages in a certain order or to request a resynchronization of messages in the event that a system has been off-line and needs to retrieve messages that were missed.</xsd:documentation>
            </xsd:annotation>
        </xsd:attribute>
    </xsd:complexType>
</xsd:element>