<xsd:element name="Correlation" minOccurs="0">
    <xsd:annotation>
        <xsd:documentation xml:lang="en">Attributes used to correlate and sequence transactions.</xsd:documentation>
    </xsd:annotation>
    <xsd:complexType>
        <xsd:attribute name="sequenceLocation" use="prohibited">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">An indication of where this message falls within a sequence of messages.</xsd:documentation>
            </xsd:annotation>
            <xsd:simpleType>
                <xsd:restriction base="xsd:NMTOKEN">
                    <xsd:enumeration value="First">
                        <xsd:annotation>
                            <xsd:documentation xml:lang="en">This is the first message within the sequence.</xsd:documentation>
                        </xsd:annotation>
                    </xsd:enumeration>
                    <xsd:enumeration value="Last">
                        <xsd:annotation>
                            <xsd:documentation xml:lang="en">This is the last message within the sequence.</xsd:documentation>
                        </xsd:annotation>
                    </xsd:enumeration>
                    <xsd:enumeration value="InSeries">
                        <xsd:annotation>
                            <xsd:documentation xml:lang="en">This is any message that is not the first or last message within the sequence.</xsd:documentation>
                        </xsd:annotation>
                    </xsd:enumeration>
                    <xsd:enumeration value="SubsequentRequest">
                        <xsd:annotation>
                            <xsd:documentation xml:lang="en">This request message is a subsequent request based on the previous message sent in the sequence.</xsd:documentation>
                        </xsd:annotation>
                    </xsd:enumeration>
                    <xsd:enumeration value="Rollback">
                        <xsd:annotation>
                            <xsd:documentation xml:lang="en">An indication that all messages within the current sequence should be ignored.</xsd:documentation>
                        </xsd:annotation>
                    </xsd:enumeration>
                </xsd:restriction>
            </xsd:simpleType>
        </xsd:attribute>
        <xsd:attribute name="followupRequestInd" type="xsd:boolean" use="prohibited">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">An indication that this is a followup request asking for more of what was requested in the previous request.</xsd:documentation>
            </xsd:annotation>
        </xsd:attribute>
        <xsd:attribute name="rollbackInd" type="xsd:boolean" use="prohibited">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">An indication that all messages within the current sequence should be ignored.</xsd:documentation>
            </xsd:annotation>
        </xsd:attribute>
        <xsd:attribute name="logID" type="String_Medium" use="prohibited">
            <xsd:annotation>
                <xsd:documentation xml:lang="en">Allow end-to-end correlation of log messages with the corresponding Web service message throughout the processing of the Web service message.</xsd:documentation>
            </xsd:annotation>
        </xsd:attribute>
    </xsd:complexType>
</xsd:element>