HTML and XHTML Standard attributes

From http://www.w3schools.com (Copyright Refsnes Data)

# HTML and XHTML Standard Attributes

The attributes listed below are standard and are supported by all HTML and XHTML tags, with a few exceptions.

## Core Attributes

Not valid in base, head, html, meta, param, script, style, and title elements.

Attribute | Value | Description
--- | --- | ---
class | class_rule or style_rule | The class of the element. Used to specify a class in the style sheet.
id | id_name | A unique id for the element. Used with CSS or JavaScript
style | style_definition | An inline style definition
title | tooltip_text | A text to display in a tool tip

## Language Attributes

Not valid in base, br, frame, frameset, hr, iframe, param, and script elements.

Attribute | Value | Description
--- | --- | ---
dir | ltr | rtl | Sets the text direction
lang | language_code | Sets the language code for the enclosed content. Language code reference

## Keyboard Attributes

Attribute | Value | Description
--- | --- | ---
accesskey | character | Sets a keyboard shortcut to access an element
tabindex | number | Sets the tab order of an element

From http://www.w3schools.com (Copyright Refsnes Data)