Standalone in XMLPort

I'm not aware of a property you can manipulate to provide such change for nav 4.0 sp3 (what I'm using) nor any other version.

So at this point what I personally can recommend is to export to a temporary blob, make any altercations you need and then export to file.

Here's a quick and crude example I can think of...

{
  Variable:   DataType:                          Length:

  tempBlob    Record      TempBlob (Temporary)
  oStream     OutStream
  iStream     InStream
  xmlHeader   Text                               80
  bText       BigText
}

tempBlob.Blob.CREATEOUTSTREAM(oStream);
tempBlob.Blob.CREATEINSTREAM(iStream);

XMLPORT.EXPORT(XMLPORT::YourXMLPort,oStream);

iStream.READTEXT(xmlHeader);  //Retrieve first line of text; Changing pointer in Blob.

IF STRPOS(xmlHeader,'<?xml') > 0 THEN BEGIN  //little security check =]
  bText.READ(iStream);  //Retrieve rest of Blob data.

  CLEAR(tempBlob.Blob);

  tempBlob.Blob.CREATEOUTSTREAM(oStream);

  oStream.WRITETEXT('<?xml version="1.0" encoding="UTF-16" standalone="yes"?>');
  oStream.WRITETEXT();

  bText.WRITE(oStream);

  tempBlob.Blob.EXPORT('C:\Documents And Settings\nasijuan\Desktop\my-altercate-xmlfile.xml')
END;

And there ya go!