1 clearfix">  <div class="region region-vnavigation-left">
    <div class="block block-book" id="block-book-navigation"><div class="cyc-vmenublock clearfix">
        <div class="cyc-vmenublockcontent"><ul class="cyc-vmenu"><li class="first expanded active-trail active"><a href="/documentation/content-layer" class="active-trail active">Content Layer</a><ul class=" active"><li class="first collapsed"><a href="/documentation/kb-representation">KB representation</a></li>
<li class="leaf"><a href="/documentation