根据HTML5.1推荐标准，HTML元素主要分为7大类：
base link meta noscript script style template titlea abbr address area (if it is a descendant of a map element) article aside audio b bdi bdo blockquote br button canvas cite code data datalist del details dfn div dl em embed fieldset figure footer form h1 h2 h3 h4 h5 h6 header hr i iframe img input ins kbd keygen label main map mark math menu meter nav noscript object ol output p picture pre progress q ruby s samp script section select small span strong sub sup svg table template textarea time u ul var video wbr article aside nav sectionh1 h2 h3 h4 h5 h6a abbr area (if it is a descendant of a map element) audio b bdi bdo br button canvas cite code data datalist del dfn em embed i iframe img input ins kbd keygen label map mark math meter noscript object output picture progress q ruby s samp script select small span strong sub sup svg template textarea time u var video wbr audio canvas embed iframe img math object picture svg videoa (if the href attribute is present) audio (if the controls attribute is present) button details embed iframe img (if the usemap attribute is present) input (if the type attribute isnot in the hidden state) keygen label select textarea video (if the controls attribute is present)7大类的关系图：
原文：http://www.cnblogs.com/ganmingying/p/7390719.html