Waybill 

This element MUST be conveyed as the root element in any instance document based on this Schema expression

Element Information

Model

UBLExtensions{0,1} , UBLVersionID{0,1} , CustomizationID{0,1} , ProfileID{0,1} , ProfileExecutionID{0,1} , ID , CarrierAssignedID{0,1} , UUID{0,1} , IssueDate{0,1} , IssueTime{0,1} , Name{0,1} , Description* , Note* , ShippingOrderID{0,1} , AdValoremIndicator{0,1} , DeclaredCarriageValueAmount{0,1} , OtherInstruction* , ConsignorParty{0,1} , CarrierParty{0,1} , FreightForwarderParty{0,1} , Shipment , DocumentReference* , ExchangeRate* , DocumentDistribution* , Signature*
Children: AdValoremIndicator, CarrierAssignedID, CarrierParty, ConsignorParty, CustomizationID, DeclaredCarriageValueAmount, Description, DocumentDistribution, DocumentReference, ExchangeRate, FreightForwarderParty, ID, IssueDate, IssueTime, Name, Note, OtherInstruction, ProfileExecutionID, ProfileID, Shipment, ShippingOrderID, Signature, UBLExtensions, UBLVersionID, UUID

Source 

<xsd:element name="Waybill" type="WaybillType">
  <xsd:annotation>
    <xsd:documentation>This element MUST be conveyed as the root element in any instance document based on this Schema expression</xsd:documentation>
  </xsd:annotation>
</xsd:element>

Sample