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HTML / 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 classname Specifies a classname for an element
id id Specifies a unique id for an element
style style_definition Specifies an inline style for an element
title text  Specifies extra information about an element (displayed as a tool tip)

Language Attributes

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

Attribute Value Description
dir ltr
rtl		 Specifies the text direction for the content in an element
lang language_code Specifies a language code for the content in an element. Language code reference
xml:lang language_code Specifies a language code for the content in an element, in XHTML documents. Language code reference

Keyboard Attributes

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

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