The command tag defines a command button like a radio button, checkbox, or a submit button. This tag provides a hook for the interface to connect to the command and share aspects of its features.
The command tag is new in HTML 5.
DTD: HTML5: <!doctype html>
command Web Browser Support:
None as of August 2010.
command End Tag:
Nothing. The command tag is a void element.
Tags valid as content: None
Tags valid as container: Metadata elements, Phrasing elements