consequence, the <em><strong>testing strategy of EPUB 3.3 concentrates on the unique EPUB 3.3 features only</strong></em>, and considers the publication resources, as well as the reading systems, to conform to the relevant Open Web Platform  specifications.
        </p>
    </section>

    <section>
        <h1 id="testing-strategies">Testing strategies</h1>

        <p>EPUB 3.3 consists of three recommendation-track documents:</p>

        <ol type="1">
          <li>EPUB Reading Systems 3.3 [[epub-rs-