

   html5.flow.model = html5.flow.model.html5   
   html5.flow.model.html5 = html5.flow.class*   
    
   html5.grouping.model = html5.grouping.class+
   html5.phrasing.model = html5.phrasing.class+
      
   html5.section.model = html5.section.model.html5         
   html5.section.model.html5 = html5.flow.model