<cont xmlns="urn:augment">

  <cont-leaf>string</cont-leaf>

  <augmented-leaf xmlns="urn:test-augment0">str</augmented-leaf>

  <another-augmented-leaf xmlns="urn:test-augment1">stri</another-augmented-leaf>

  <a21 xmlns="urn:test-augment1">string</a21>

</cont>