<element name="keyboards" xmlns="http://relaxng.org/ns/structure/1.0"
         datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
  <zeroOrMore>
    <element name="keyboard">
      <element name="keyboardId">
        <text />
      </element>
      <element name="description">
        <text />
      </element>
      <element name="ascii">
        <choice>
          <value>True</value>
          <value>False</value>
        </choice>
      </element>
      <optional>
        <element name="comment">
          <text />
        </element>
      </optional>
      <element name="languages">
        <zeroOrMore>
          <element name="language">
            <element name="languageId">
              <text />
            </element>
            <element name="rank">
              <data type="nonNegativeInteger" />
            </element>
          </element>
        </zeroOrMore>
      </element>
      <element name="territories">
        <zeroOrMore>
          <element name="territory">
            <element name="territoryId">
              <text />
            </element>
            <element name="rank">
              <data type="nonNegativeInteger" />
            </element>
          </element>
        </zeroOrMore>
      </element>
    </element>
  </zeroOrMore>
</element>