<xs:attributeGroup name="OTA_PayloadStdAttributes">
    <xs:annotation>
        <xs:documentation xml:lang="en">The OTA_PayloadStdAttributes defines the standard attributes that appear on the root element for all OTA payloads.</xs:documentation>
    </xs:annotation>
    <xs:attribute name="EchoToken" type="StringLength1to128" use="optional">
        <xs:annotation>
            <xs:documentation xml:lang="en">A reference for additional message identification, assigned by the requesting host system. When a request message includes an echo token the corresponding response message MUST include an echo token with an identical value.</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="TimeStamp" type="xs:dateTime" use="optional">
        <xs:annotation>
            <xs:documentation xml:lang="en">Indicates the creation date and time of the message in UTC using the following format specified by ISO 8601; YYYY-MM-DDThh:mm:ssZ with time values using the 24 hour clock (e.g. 20 November 2003, 1:59:38 pm UTC becomes 2003-11-20T13:59:38Z).</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="Target" use="optional" default="Production">
        <xs:annotation>
            <xs:documentation xml:lang="en">Used to indicate whether the request is for the Test or Production system.</xs:documentation>
        </xs:annotation>
        <xs:simpleType>
            <xs:restriction base="xs:NMTOKEN">
                <xs:enumeration value="Test" />
                <xs:enumeration value="Production" />
            </xs:restriction>
        </xs:simpleType>
    </xs:attribute>
    <xs:attribute name="Version" type="xs:decimal" use="required">
        <xs:annotation>
            <xs:documentation xml:lang="en">For all OTA versioned messages, the version of the message is indicated by a decimal value.</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="TransactionIdentifier" type="StringLength1to32" use="optional">
        <xs:annotation>
            <xs:documentation xml:lang="en">A unique identifier 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).</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="SequenceNmbr" type="xs:nonNegativeInteger" use="optional">
        <xs:annotation>
            <xs:documentation xml:lang="en">Used to identify the sequence number of the transaction as assigned by the sending system; 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. </xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="TransactionStatusCode" use="optional">
        <xs:annotation>
            <xs:documentation xml:lang="en">This indicates where this message falls within a sequence of messages. </xs:documentation>
        </xs:annotation>
        <xs:simpleType>
            <xs:restriction base="xs:NMTOKEN">
                <xs:enumeration value="Start">
                    <xs:annotation>
                        <xs:documentation xml:lang="en">This is the first message within a transaction.</xs:documentation>
                    </xs:annotation>
                </xs:enumeration>
                <xs:enumeration value="End">
                    <xs:annotation>
                        <xs:documentation xml:lang="en">This is the last message within a transaction.</xs:documentation>
                    </xs:annotation>
                </xs:enumeration>
                <xs:enumeration value="Rollback">
                    <xs:annotation>
                        <xs:documentation xml:lang="en">This indicates that all messages within the current transaction must be ignored.</xs:documentation>
                    </xs:annotation>
                </xs:enumeration>
                <xs:enumeration value="InSeries">
                    <xs:annotation>
                        <xs:documentation xml:lang="en">This is any message that is not the first or last message within a transaction.</xs:documentation>
                    </xs:annotation>
                </xs:enumeration>
                <xs:enumeration value="Continuation">
                    <xs:annotation>
                        <xs:documentation xml:lang="en">Specifies that this is a followup request asking for more of what was requested in the previous request.</xs:documentation>
                    </xs:annotation>
                </xs:enumeration>
                <xs:enumeration value="Subsequent">
                    <xs:annotation>
                        <xs:documentation xml:lang="en">This request message is a subsequent request based on the previous message sent in this transaction.
</xs:documentation>
                    </xs:annotation>
                </xs:enumeration>
            </xs:restriction>
        </xs:simpleType>
    </xs:attribute>
    <xs:attributeGroup ref="PrimaryLangID_Group">
        <xs:annotation>
            <xs:documentation xml:lang="en">Identifes the primary language for the message.</xs:documentation>
        </xs:annotation>
    </xs:attributeGroup>
    <xs:attributeGroup ref="AltLangID_Group">
        <xs:annotation>
            <xs:documentation xml:lang="en">Identifes the alternate language for the message.</xs:documentation>
        </xs:annotation>
    </xs:attributeGroup>
    <xs:attribute name="RetransmissionIndicator" type="xs:boolean" use="optional">
        <xs:annotation>
            <xs:documentation xml:lang="en">When true, indicates the message is being re-sent after a failure. It is recommended that this attribute is used (i.e., set to TRUE) only when a message is retransmitted.</xs:documentation>
        </xs:annotation>
    </xs:attribute>
</xs:attributeGroup>