A trivial example of markup language

  <recipebook>
     <recipe>
        <recipetype name="sweets"/>
        <title>Apple Cake</title>
        <ingredient>apples</ingredient>
        <ingredient>meal</ingredient>
        <ingredient>sugar</ingredient>
        <step number="1">
         ...
        </step>
        <step number="2">
         ...
        </step>
     </recipe>
  </recipebook>