 for features that might belong in other
          specifications. This document might not be the final venue for some
          of the work specified in this draft. (CSS)
        </p>
      </aside>
      <section>
        <h3>
          <dfn>Title bar area env variables</dfn>
        </h3>
        <table dfn-type="value" dfn-for="env()">
          <tr>
            <th>
              Name
            </th>
            <th>
              Value
            </th>
          </tr>
          <tr>
            <td