<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>