</field>
      </fields>
    </class>

    <class xdoc.anchorName="requirement">
      <name>Requirement</name>
      <version>1.0.0/1.1.0</version>
      <description>Describes a component requirement.</description>
      <!-- see o.a.m.plugin.descriptor.Requirement -->
      <fields>
        <field>
          <name>role</name>
          <required>true</required>

        <field>
          <name>name</name>
          <required>false</required>
          <version>1.0.0+</version>
          <type>String</type>
          <description>
            The optional name that describes the mirror.
          </description>
        </field>
        <field>
          <name>url</name>
          <required>true</required>
          <version>1.0.0+</version>
          <type>String</type>