How to send 2 different XML payloads, each with an XML declaration

[#1]

I need to send the following xml request to a server, as you can see, there're 2 XML declarations in it. How do I go about this in APIgee Assign Message Policy (or some other kind of policy)?

I tried setting 2 payloads but it deems them as only one xml file (so only one declaration).

<?xml version="1.0"?>
<AccessRequest xml:lang="en-US">
  <AccessLicenseNumber>YourLicenseNumber</AccessLicenseNumber>
  <UserId>YourUserID</UserId>
  <Password>YourPassword</Password>
</AccessRequest>

<?xml version="1.0"?>
<TimeInTransitRequest xml:lang="en-US">
  <Request>
    <TransactionReference>
	<CustomerContext>Your Test Case Summary Description</CustomerContext>
      <XpciVersion>1.001</XpciVersion>
    </TransactionReference>
    <RequestAction>TimeInTransit</RequestAction>
  </Request>
  <TransitFrom>
    <AddressArtifactFormat>
      <PoliticalDivision2>Bishkek</PoliticalDivision2>
      <PostcodePrimaryLow>720001</PostcodePrimaryLow>
      <CountryCode>KG</CountryCode>
    </AddressArtifactFormat>
  </TransitFrom>
  <TransitTo>
    <AddressArtifactFormat>
      <PoliticalDivision2>Phoenix</PoliticalDivision2>
      <PoliticalDivision1>AZ</PoliticalDivision1>
      <PostcodePrimaryLow>85034</PostcodePrimaryLow>
      <PostcodeExtendedLow>6410</PostcodeExtendedLow>
      <CountryCode>US</CountryCode>
    </AddressArtifactFormat>
  </TransitTo>
  <PickupDate>20080630</PickupDate>
  <MaximumListSize>5</MaximumListSize>
  <InvoiceLineTotal>
    <CurrencyCode>USD</CurrencyCode>
    <MonetaryValue>50</MonetaryValue>
  </InvoiceLineTotal>
  <ShipmentWeight>
    <UnitOfMeasurement>
      <Code>KGS</Code>
      <Description>Kilograms</Description>
    </UnitOfMeasurement>
    <Weight>2</Weight>
  </ShipmentWeight>
</TimeInTransitRequest>

[anilsr]

Ideally, you should fix the problem at the source. What you're sending is not XML because having more than one XML declaration violates XML's basic grammar, making the data not well-formed.

You can try using XSLT in Apigee to remove xml declaration,

<xsl:output method="xml" omit-xml-declaration="yes"/>