<t:root xmlns:t="test"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="test test.xsd">

  <restriction-a z="z">
    <a>a</a>
    <b>b</b>
    <c>c</c>
  </restriction-a>

  <restriction-a x="x" y="y" z="z">
    <a>a</a>
    <b>b</b>
    <c>c</c>
  </restriction-a>

  <restriction-b y="y">
    <a>a</a>
    <b>b</b>
  </restriction-b>

  <restriction-b y="y">
    <a>a</a>
    <c>c</c>
  </restriction-b>

  <restriction-b x="x" y="y">
    <a>a</a>
  </restriction-b>

</t:root>
