delphi xmlchildnode gets attribute from parent

I am trying to write an xML in Delphi.

If I gife a node a xmlns attribute, the child node of that node shows the attribute also but then empty. How can I prefent that the child node shows the attribute?

I tested with the following code

procedure TForm2.Button1Click(Sender: TObject);
var
  RootNode, CurNode, PmtNode, PmtDetNode : IXMLNODE;
  I:Integer;
begin
   SepaDoc := Newxmldocument;
   SepaDoc.Encoding := 'utf-8';
   SepaDoc.Options := [doNodeAutoIndent];
   RootNode := SepaDoc.AddChild('Document');
   CurNode := RootNode.AddChild('Child1');
   CurNode.Attributes['xmlns'] := 'apenootje';
   CurNode := CurNode.AddChild('Child2');
   CurNode := CurNode.AddChild('Child3');
   SepaDoc.SaveToFile('D:\indir\testsepa.xml');
end;

This result in the following XML

<?xml version="1.0" encoding="UTF-8"?>
-<Document>   -<Child1 xmlns="apenootje">
    -<Child2 xmlns="">
       <Child3/>
     </Child2>
    </Child1>    
  </Document>

Thanks Rob Nowee