* outline-tree - a menu where the options can be shown or hidden with small widgets, often represented by a small triangle or plus and minus signs. might be possible to build one using <code><details></code> and <code><summary></code>.
* combo-box - a field which is accompanied by a menu of preset values that can be used to quickly enter common or typical values.
* signature - a field for entering a signature, e.g. on a touch or tablet device or with a mouse.
Do we need something equivalent to HTML5's <code><progress></code> element? ====== updated appearance value list ======Full updated appearance value list with equivalents:* '''icon ''' - handled by 'icon' property and HTML5 Drag & Drop* '''window ''' - mostly handled outside of elements, except perhaps a '''tooltip' '' value which could be purely presentational* '''button ''' - by default a push-button** '''push-button ''' - <code><input type=button></code> and <code><button></code>** '''hyperlink ''' - <code><a href></code>** '''radio-button ''' - <code><input type="radio"></code>** '''checkbox ''' - <code><input type="checkbox"></code>** '''menu-item ''' - <code><option></code> and <code><optgroup></code>** '''tab ''' - no HTML5 equivalent* '''menu ''' - by default a pop-up-menu** '''menubar ''' - no HTML5 equivalent** '''pull-down-menu ''' - no HTML5 equivalent** '''pop-up-menu ''' - <code><select></code>** '''list-menu ''' - <code><select size=n</code> (where n>1)** '''radio-group ''' - no HTML5 equivalent** '''checkbox-group ''' - no HTML5 equivalent** '''outline-tree ''' - no complete HTML5 equivalent but <code><details></code> and <code><summary></code> may help.** '''range ''' - <code><input type="range"></code>* '''field ''' - <code><input type="text"></code> and <code><textarea></code>** '''combo-box ''' - no HTML5 equivalent** '''signature ''' - no HTML5 equivalent** '''password ''' - <code><input type="password"></code>
==== CSS Style Attributes ====