<xsd:complexType name="MessageHeader">
<xsd:annotation>
<xsd:documentation xml:lang="en">A type defining the content model for a generic message header that is refined by its derived classes.</xsd:documentation>
</xsd:annotation>
<xsd:sequence>
<xsd:element name="conversationId" type="ConversationId" minOccurs="0">
<xsd:annotation>
<xsd:documentation xml:lang="en">A unique identifier created by the initiator of a conversation allowing a group of message exchanges to be recognized as related.</xsd:documentation>
</xsd:annotation>
</xsd:element>
<xsd:element name="messageId" type="MessageId">
<xsd:annotation>
<xsd:documentation xml:lang="en">A unique identifier (within its coding scheme) assigned to the message by its creating party.</xsd:documentation>
</xsd:annotation>
</xsd:element>
<xsd:element name="inReplyTo" type="MessageId" minOccurs="0">
<xsd:annotation>
<xsd:documentation xml:lang="en">A copy of the unique message identifier (within it own coding scheme) to which this message is responding.</xsd:documentation>
</xsd:annotation>
</xsd:element>
<xsd:element name="sentBy" type="PartyId">
<xsd:annotation>
<xsd:documentation xml:lang="en">The unique identifier (within its coding scheme) for the originator of a message instance.</xsd:documentation>
</xsd:annotation>
</xsd:element>
<xsd:element name="sendTo" type="PartyId" minOccurs="0" maxOccurs="unbounded">
<xsd:annotation>
<xsd:documentation xml:lang="en">A unique identifier (within its coding scheme) indicating an intended recipent of a message.</xsd:documentation>
</xsd:annotation>
</xsd:element>
<xsd:element name="copyTo" type="PartyId" minOccurs="0" maxOccurs="unbounded">
<xsd:annotation>
<xsd:documentation xml:lang="en">A unique identifier (within the specified coding scheme) giving the details of some party to whom a copy of this message will be sent for reference.</xsd:documentation>
</xsd:annotation>
</xsd:element>
<xsd:element name="creationTimestamp" type="xsd:dateTime">
<xsd:annotation>
<xsd:documentation xml:lang="en">The date and time (on the source system) when this message instance was created.</xsd:documentation>
</xsd:annotation>
</xsd:element>
<xsd:element name="expiryTimestamp" type="xsd:dateTime" minOccurs="0">
<xsd:annotation>
<xsd:documentation xml:lang="en">The date and time (on the source system) when this message instance will be considered expired.</xsd:documentation>
</xsd:annotation>
</xsd:element>
<xsd:element ref="dsig:Signature" minOccurs="0" maxOccurs="unbounded" />
</xsd:sequence>
</xsd:complexType>
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