117cfc06_s_for_Designers___InstantShift__Recommended_role_value
[Language feature] li element whose parent is an ol or ul element [Restrictions] Role must be either listitem, menuitemcheckbox, menuitemradio, option, tab, or treeitem [Recommended role value] 
listitem role
HTML5 Best Practices for Designers | InstantShift
Recommended role value