DataExchange 

The element is open and allows definition of other patterns
unspecified in the concrete set of Business Transaction patterns. The
DataExchange element was not constrained to support state alignment. The
semantics related to DataExchange are partner-specific and therefore left
unspecified. Note: This element was added in v2.0.

Element Information

Model

Documentation{0,1} , RequestingRole , RespondingRole , (RequestingBusinessActivity{0,1} | RespondingBusinessActivity{0,1})
Children: Documentation, RequestingBusinessActivity, RequestingRole, RespondingBusinessActivity, RespondingRole

Attributes

QName Type Fixed Default Use Inheritable Annotation
isGuaranteedDeliveryRequired xsd:boolean false optional 
Refers to the expectation that the underlying messaging service
used to implement the Business Transaction protocol provides guaranteed
delivery, i.e. reliable messaging.
name xsd:string required 
A designation that may be relevant to a business analyst but is
not intended for referencing.
nameID xsd:ID required 
Used for referencing, for example, for identification of elements
within an ebBP instance.
pattern xsd:anyURI optional 
May point to the pattern on which the Business Transaction is
based. This attribute is used only when the concrete BT
patterns provided are not used. This attribute is retained for backward compatibility. The
concrete Business Transaction patterns are also specified. This attribute is 
not be used if one of the concrete, extensible (Data Exchange) or Legacy
Business Transaction (used for conversion purposes only) patterns are used.
Note: These changes were made in v2.0.
Wildcard: ANY attribute from ANY namespace OTHER than 'http://docs.oasis-open.org/ebxmlbp/ebbp-2.0'

Source 

<xsd:element name="DataExchange" substitutionGroup="BusinessTransactionHead">
  <xsd:annotation>
    <xsd:documentation>The element is open and allows definition of other patterns unspecified in the concrete set of Business Transaction patterns. The DataExchange element was not constrained to support state alignment. The semantics related to DataExchange are partner-specific and therefore left unspecified. Note: This element was added in v2.0.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:complexContent>
      <xsd:extension base="BusinessTransactionBaseType">
        <xsd:choice minOccurs="0" maxOccurs="2">
          <xsd:element name="RequestingBusinessActivity" minOccurs="0">
            <xsd:complexType>
              <xsd:complexContent>
                <xsd:restriction base="RequestingBusinessActivityType">
                  <xsd:sequence>
                    <xsd:element ref="Documentation" minOccurs="0" maxOccurs="unbounded"/>
                    <xsd:element ref="DocumentEnvelope"/>
                    <xsd:element name="ReceiptAcknowledgement" type="ReceiptAcknowledgementType" minOccurs="0"/>
                    <xsd:element name="ReceiptAcknowledgementException" type="ReceiptAcknowledgementExceptionType" minOccurs="0"/>
                  </xsd:sequence>
                  <xsd:attribute name="isAuthorizationRequired" type="xsd:boolean"/>
                  <xsd:attribute name="isIntelligibleCheckRequired" type="xsd:boolean"/>
                  <xsd:attribute name="isNonRepudiationRequired" type="xsd:boolean"/>
                  <xsd:attribute name="isNonRepudiationReceiptRequired" type="xsd:boolean"/>
                  <xsd:attribute name="timeToAcknowledgeReceipt" type="xsd:duration"/>
                  <xsd:attribute name="timeToAcknowledgeAcceptance" type="xsd:duration"/>
                  <xsd:attribute name="retryCount" type="xsd:int"/>
                </xsd:restriction>
              </xsd:complexContent>
            </xsd:complexType>
          </xsd:element>
          <xsd:element name="RespondingBusinessActivity" minOccurs="0">
            <xsd:complexType>
              <xsd:complexContent>
                <xsd:restriction base="RespondingBusinessActivityType">
                  <xsd:sequence>
                    <xsd:element ref="Documentation" minOccurs="0" maxOccurs="unbounded"/>
                    <xsd:element ref="DocumentEnvelope" minOccurs="0" maxOccurs="unbounded"/>
                    <xsd:element name="ReceiptAcknowledgement" type="ReceiptAcknowledgementType" minOccurs="0"/>
                    <xsd:element name="ReceiptAcknowledgementException" type="ReceiptAcknowledgementExceptionType" minOccurs="0"/>
                  </xsd:sequence>
                  <xsd:attribute name="isAuthorizationRequired" type="xsd:boolean"/>
                  <xsd:attribute name="isIntelligibleCheckRequired" type="xsd:boolean"/>
                  <xsd:attribute name="isNonRepudiationRequired" type="xsd:boolean"/>
                  <xsd:attribute name="isNonRepudiationReceiptRequired" type="xsd:boolean"/>
                  <xsd:attribute name="timeToAcknowledgeReceipt" type="xsd:duration"/>
                  <xsd:attribute name="timeToAcknowledgeAcceptance" type="xsd:duration"/>
                  <xsd:attribute name="retryCount" type="xsd:int"/>
                </xsd:restriction>
              </xsd:complexContent>
            </xsd:complexType>
          </xsd:element>
        </xsd:choice>
      </xsd:extension>
    </xsd:complexContent>
  </xsd:complexType>
</xsd:element>

Sample