    <div class="container"><div class="alignStart"><!--stretch--></div></div>
    <br>
    <!-- <baseline-position> -->
    <div class="container"><div class="alignStart"><!--baseline--></div></div>
    <br>
    <!-- <self-position>, part 1: -->
    <div class="container"><div class="alignCenter"><!--center--></div></div>
    <div class="container"><div class="alignStart"><!--start--></div></div>
    <div class="container"><div class="alignEnd"><!--end--></div></div>
    <div class="container"><div class="a