<?xml version="1.0" encoding="UTF-8"?>
<!-- Comment-1 -->
<?a-pi pi-1?>
<!-- Comment-2 -->
<far-north> text-1A
    <!-- Comment-3 --> text-1B
    <?a-pi pi-2?> text-1C
  <north mark="n0"> text-2A
      <!-- Comment-4 --> text-2B
      <?b-pi pi-3?> text-2C
    <near-north> text-3A
      <far-west/> text-3B
      <west mark="w0" west-attr-1="w1" west-attr-2="w2" west-attr-3="w3"/> text-3C
      <near-west/> text-3D
      <center mark="c0" center-attr-1="c1" center-attr-2="c2" center-attr-3="c3"> text-4A
        <near-south-west/> text-4B
            <!--Comment-5--> text-4C
            <?a-pi pi-4?> text-4D
        <near-south> text-5A
          <south mark="s0" south-attr-1="s1" south-attr-2="s2"> text-6A
            <far-south/> text-6B
          </south> text-5B
        </near-south> text-4E
            <?c-pi pi-5?> text-4F
        <south-east mark="1se"/> text-4G
        <south-east mark="2se"/> text-4H
      </center> text-3E
      <near-east/> text-3F
      <east mark="e0">Text in east</east> text-3G
      <far-east/> text-3H
    </near-north> text-2D
  </north> text-1D
</far-north>
<!-- Comment-6 -->
<?a-pi pi-6?>
<!-- Comment-7 -->
