<?xml version="1.0"?>
<main>
  <a attr="w">
    <b>
      <c dim="h">
        <d size="l"/>
      </c>
    </b>
  </a>
  <size for="d" h="17" />
  <size for="e" h="27" />
  <size for="d" w="37" />
  <size for="e" w="47" />
</main>