<ui:UiBinder xmlns:ui='urn:ui:com.google.gwt.uibinder'
  xmlns:gwt='urn:import:com.google.gwt.user.client.ui'>
  <gwt:HTMLPanel>Div root start
    <div ui:field='div1'>Div1
      <div ui:field='div2'>Div2</div>
      <span ui:field='span1'>Span1</span>
    Div1 end</div>
    <div>Div anon start
      <div ui:field='div3'>Div3
        <div ui:field='div4'>Div4</div>
        <span ui:field='span2'>Span2</span>
      Div3 end</div>
    Div anon end</div>
  Div root end</gwt:HTMLPanel>
</ui:UiBinder>