HTML5: Attribute used in html5

Attribute	Value	Description
accesskey	character	Specifies a shortcut key to access an element
class	classname	Refers to a class specified in a style sheet
contenteditable	true false inherit	Specifies whether a user can edit the content of an element or not
contextmenu	menu_id	Specifies a context menu for an element. The value must be the id of a <menu> element
dir	ltr rtl auto	Specifies the text direction for the content in an element
draggable	true false auto	Specifies whether a user is allowed to drag an element or not
dropzone	copy move link	Specifies what happens when dragged items/data is dropped in the element
hidden	hidden	Specifies that an element should be hidden
id	id	Specifies a unique id for an element
lang	language_code	Specifies the language of the element's content
spellcheck	true false	Specifies if the element must have its spelling and grammar checked
style	style_definitions	Specifies an inline style for an element
tabindex	number	Specifies the tab order of an element
title	text	Specifies extra information about an element

HTML5