/HELP.html" class="sf-depth-4">1.8 HELP</a></li></ul></li><li id="menu-1391-1" class="middle even sf-item-4 sf-depth-3 sf-total-children-9 sf-parent-children-1 sf-single-children-8 menuparent"><a href="../data-set-basics.html" class="sf-depth-3 menuparent">2. Data Set Basics</a><ul><li id="menu-1238-1" class="first odd sf-item-1 sf-depth-4 sf-no-children"><a href="../data-set-basics/OVERVIEW.html" class="sf-depth-4">2.1 OVERVIEW</a></li><li id="menu-1239-1" class="middle even sf-item-2 sf-depth-4 sf-total-c