are any more recent changes on those branches.</p>

  <h2 id="releases">Preparing System Releases</h2>

  <p>There are two ways of preparing system releases:</p>

  <dl>
    <dt>A system release is simply a particular revision of the trunk</dt>

    <dd>
      <p>In order to do this it will be necessary to restrict changes on the
      trunk whilst the release is being prepared.</p>

      <ul>
        <li>Users can continue to develop changes not intended for inclusion in
        this release on branches.<