   <p>
      To <dfn>get an element ID</dfn> for an <var>item</var> in a <var>list</var>, run the following steps:
      <ol>
        <li>If there exists an element in <var>list</var> component-wise equal to <var>item</var>, return its index.</li>
        <li>Otherwise, append <var>item</var> to the end of <var>list</var> and return its index.</li>
      </ol>
      </p>
    </section>

    <section data-dfn-for="Profiler" data-link-for="Profiler">
      <h2>The <dfn>Profiler</dfn> Interface</h2>
      <pre