XHTML Reference

Legend: Deprecated, Loose DTD, Frameset DTD

Name	Related Elements	Type	Default	Depr.	DTD	Comment
abbr	td, th	%Text;	#IMPLIED			abbreviation for header cell
accept-charset	form	%Charsets;	#IMPLIED			list of supported charsets
accept	form, input	%ContentTypes;	#IMPLIED			list of MIME types for file upload
accesskey	a, area, button, input, label, legend, textarea	%Character;	#IMPLIED			accessibility key character
action	form	%URI;	#REQUIRED			server-side form handler
align	caption	%CAlign;	#IMPLIED	D	L	relative to table
align	applet, iframe, img, input, object	%IAlign;	#IMPLIED	D	L	vertical or horizontal alignment
align	legend	%LAlign;	#IMPLIED	D	L	relative to fieldset
align	table	%TAlign;	#IMPLIED	D	L	table position relative to window
align	hr	(left \| center \| right)	#IMPLIED	D	L
align	div, h1, h2, h3, h4, h5, h6, p	(left \| center \| right \| justify)	#IMPLIED	D	L	align, text alignment
align	col, colgroup, tbody, td, tfoot, th, thead, tr	(left \| center \| right \| justify \| char)	#IMPLIED
alink	body	%Color;	#IMPLIED	D	L	color of selected links
alt	applet	%Text;	#IMPLIED	D	L	short description
alt	area, img	%Text;	#REQUIRED			short description
alt	input	CDATA	#IMPLIED			short description
archive	applet	CDATA	#IMPLIED	D	L	comma-separated archive list
archive	object	CDATA	#IMPLIED			space-separated list of URIs
axis	td, th	CDATA	#IMPLIED			comma-separated list of related headers
background	body	%URI;	#IMPLIED	D	L	texture tile for document background
bgcolor	table	%Color;	#IMPLIED	D	L	background color for cells
bgcolor	tr	%Color;	#IMPLIED	D	L	background color for row
bgcolor	td, th	%Color;	#IMPLIED	D	L	cell background color
bgcolor	body	%Color;	#IMPLIED	D	L	document background color
border	table	%Pixels;	#IMPLIED			controls frame width around table
border	img, object	%Pixels;	#IMPLIED	D	L	link border width
cellpadding	table	%Length;	#IMPLIED			spacing within cells
cellspacing	table	%Length;	#IMPLIED			spacing between cells
char	col, colgroup, tbody, td, tfoot, th, thead, tr	%Character;	#IMPLIED			alignment char, e.g. char=':'
charoff	col, colgroup, tbody, td, tfoot, th, thead, tr	%Length;	#IMPLIED			offset for alignment char
charset	a, link, script	%Charset;	#IMPLIED			char encoding of linked resource
checked	input	(checked)	#IMPLIED			for radio buttons and check boxes
cite	blockquote, q	%URI;	#IMPLIED			URI for source document or msg
cite	del, ins	%URI;	#IMPLIED			info on reason for change
class	All elements but base, basefont, head, html, meta, param, script, style, title	CDATA	#IMPLIED			space-separated list of classes
classid	object	%URI;	#IMPLIED			identifies an implementation
clear	br	(left \| all \| right \| none)	none	D	L	control of text flow
code	applet	CDATA	#IMPLIED	D	L	applet class file
codebase	object	%URI;	#IMPLIED			base URI for classid, data, archive
codebase	applet	%URI;	#IMPLIED	D	L	optional base URI for applet
codetype	object	%ContentType;	#IMPLIED			content type for code
color	basefont, font	%Color;	#IMPLIED	D	L	text color
cols	frameset	%MultiLengths;	#IMPLIED		F	list of lengths, default: 100% (1 col)
cols	textarea	NUMBER	#REQUIRED
colspan	td, th	NUMBER	1			number of cols spanned by cell
compact	dir, dl, menu, ol, ul	(compact)	#IMPLIED	D	L	reduced interitem spacing
content	meta	CDATA	#REQUIRED			associated information
coords	area	%Coords;	#IMPLIED			comma-separated list of lengths
coords	a	%Coords;	#IMPLIED			for use with client-side image maps
data	object	%URI;	#IMPLIED			reference to object's data
datetime	del, ins	%Datetime;	#IMPLIED			date and time of change
declare	object	(declare)	#IMPLIED			declare but don't instantiate flag
defer	script	(defer)	#IMPLIED			UA may defer execution of script
dir	All elements but applet, base, basefont, bdo, br, frame, frameset, iframe, param, script	(ltr \| rtl)	#IMPLIED			direction for weak/neutral text
dir	bdo	(ltr \| rtl)	#REQUIRED			directionality
disabled	button, input, optgroup, option, select, textarea	(disabled)	#IMPLIED			unavailable in this context
enctype	form	%ContentType;	"application/x-www- form-urlencoded"
face	basefont, font	CDATA	#IMPLIED	D	L	comma-separated list of font names
for	label	IDREF	#IMPLIED			matches field ID value
frame	table	%TFrame;	#IMPLIED			which parts of frame to render
frameborder	frame, iframe	(1 \| 0)	1		F	request frame borders?
headers	td, th	IDREFS	#IMPLIED			list of id's for header cells
height	iframe	%Length;	#IMPLIED		L	frame height
height	td, th	%Length;	#IMPLIED	D	L	height for cell
height	img, object	%Length;	#IMPLIED			override height
height	applet	%Length;	#REQUIRED	D	L	initial height
href	a, area, link	%URI;	#IMPLIED			URI for linked resource
href	base	%URI;	#IMPLIED			URI that acts as base URI
hreflang	a, link	%LanguageCode;	#IMPLIED			language code
hspace	applet, img, object	%Pixels;	#IMPLIED	D	L	horizontal gutter
http-equiv	meta	NAME	#IMPLIED			HTTP response header name
id	All elements but base, head, html, meta, script, style, title	ID	#IMPLIED			document-wide unique id
ismap	img, input	(ismap)	#IMPLIED			use server-side image map
label	option	%Text;	#IMPLIED			for use in hierarchical menus
label	optgroup	%Text;	#REQUIRED			for use in hierarchical menus
lang	All elements but applet, base, basefont, br, frame, frameset, iframe, param, script	%LanguageCode;	#IMPLIED			language code
language	script	CDATA	#IMPLIED	D	L	predefined script language name
link	body	%Color;	#IMPLIED	D	L	color of links
longdesc	img	%URI;	#IMPLIED			link to long description (complements alt)
longdesc	frame, iframe	%URI;	#IMPLIED		F	link to long description (complements title)
marginheight	frame, iframe	%Pixels;	#IMPLIED		F	margin height in pixels
marginwidth	frame, iframe	%Pixels;	#IMPLIED		F	margin widths in pixels
maxlength	input	NUMBER	#IMPLIED			max chars for text fields
media	style	%MediaDesc;	#IMPLIED			designed for use with these media
media	link	%MediaDesc;	#IMPLIED			for rendering on these media
method	form	(GET \| POST)	GET			HTTP method used to submit the form
multiple	select	(multiple)	#IMPLIED			default is single selection
name	button, textarea	CDATA	#IMPLIED
name	applet	CDATA	#IMPLIED	D	L	allows applets to find each other
name	select	CDATA	#IMPLIED			field name
name	form	CDATA	#IMPLIED			name of form for scripting
name	frame, iframe	CDATA	#IMPLIED		F	name of frame for targetting
name	img	CDATA	#IMPLIED			name of image for scripting
name	a	CDATA	#IMPLIED			named link end
name	input, object	CDATA	#IMPLIED			submit as part of form
name	map	CDATA	#REQUIRED			for reference by usemap
name	param	CDATA	#REQUIRED			property name
name	meta	NAME	#IMPLIED			metainformation name
nohref	area	(nohref)	#IMPLIED			this region has no action
noresize	frame	(noresize)	#IMPLIED		F	allow users to resize frames?
noshade	hr	(noshade)	#IMPLIED	D	L
nowrap	td, th	(nowrap)	#IMPLIED	D	L	suppress word wrap
object	applet	CDATA	#IMPLIED	D	L	serialized applet file
onblur	a, area, button, input, label, select, textarea	%Script;	#IMPLIED			the element lost the focus
onchange	input, select, textarea	%Script;	#IMPLIED			the element value was changed
onclick	All elements but applet, base, basefont, bdo, br, font, frame, frameset, head, html, iframe, isindex, meta, param, script, style, title	%Script;	#IMPLIED			a pointer button was clicked
ondblclick	All elements but applet, base, basefont, bdo, br, font, frame, frameset, head, html, iframe, isindex, meta, param, script, style, title	%Script;	#IMPLIED			a pointer button was double clicked
onfocus	a, area, button, input, label, select, textarea	%Script;	#IMPLIED			the element got the focus
onkeydown	All elements but applet, base, basefont, bdo, br, font, frame, frameset, head, html, iframe, isindex, meta, param, script, style, title	%Script;	#IMPLIED			a key was pressed down
onkeypress	All elements but applet, base, basefont, bdo, br, font, frame, frameset, head, html, iframe, isindex, meta, param, script, style, title	%Script;	#IMPLIED			a key was pressed and released
onkeyup	All elements but applet, base, basefont, bdo, br, font, frame, frameset, head, html, iframe, isindex, meta, param, script, style, title	%Script;	#IMPLIED			a key was released
onload	frameset	%Script;	#IMPLIED		F	all the frames have been loaded
onload	body	%Script;	#IMPLIED			the document has been loaded
onmousedown	All elements but applet, base, basefont, bdo, br, font, frame, frameset, head, html, iframe, isindex, meta, param, script, style, title	%Script;	#IMPLIED			a pointer button was pressed down
onmousemove	All elements but applet, base, basefont, bdo, br, font, frame, frameset, head, html, iframe, isindex, meta, param, script, style, title	%Script;	#IMPLIED			a pointer was moved within
onmouseout	All elements but applet, base, basefont, bdo, br, font, frame, frameset, head, html, iframe, isindex, meta, param, script, style, title	%Script;	#IMPLIED			a pointer was moved away
onmouseover	All elements but applet, base, basefont, bdo, br, font, frame, frameset, head, html, iframe, isindex, meta, param, script, style, title	%Script;	#IMPLIED			a pointer was moved onto
onmouseup	All elements but applet, base, basefont, bdo, br, font, frame, frameset, head, html, iframe, isindex, meta, param, script, style, title	%Script;	#IMPLIED			a pointer button was released
onreset	form	%Script;	#IMPLIED			the form was reset
onselect	input, textarea	%Script;	#IMPLIED			some text was selected
onsubmit	form	%Script;	#IMPLIED			the form was submitted
onunload	frameset	%Script;	#IMPLIED		F	all the frames have been removed
onunload	body	%Script;	#IMPLIED			the document has been removed
profile	head	%URI;	#IMPLIED			named dictionary of meta info
prompt	isindex	%Text;	#IMPLIED	D	L	prompt message
readonly	textarea	(readonly)	#IMPLIED
readonly	input	(readonly)	#IMPLIED			for text and passwd
rel	a, link	%LinkTypes;	#IMPLIED			forward link types
rev	a, link	%LinkTypes;	#IMPLIED			reverse link types
rows	frameset	%MultiLengths;	#IMPLIED		F	list of lengths, default: 100% (1 row)
rows	textarea	NUMBER	#REQUIRED
rowspan	td, th	NUMBER	1			number of rows spanned by cell
rules	table	%TRules;	#IMPLIED			rulings between rows and cols
scheme	meta	CDATA	#IMPLIED			select form of content
scope	td, th	%Scope;	#IMPLIED			scope covered by header cells
scrolling	frame, iframe	(yes \| no \| auto)	auto		F	scrollbar or none
selected	option	(selected)	#IMPLIED
shape	area	%Shape;	rect			controls interpretation of coords
shape	a	%Shape;	rect			for use with client-side image maps
size	hr	%Pixels;	#IMPLIED	D	L
size	font	CDATA	#IMPLIED	D	L	[+\|-]nn e.g. size="+1", size="4"
size	input	CDATA	#IMPLIED			specific to each type of field
size	basefont	CDATA	#REQUIRED	D	L	base font size for font elements
size	select	NUMBER	#IMPLIED			rows visible
span	col	NUMBER	1			col attributes affect N columns
span	colgroup	NUMBER	1			default number of columns in group
src	script	%URI;	#IMPLIED			URI for an external script
src	input	%URI;	#IMPLIED			for fields with images
src	frame, iframe	%URI;	#IMPLIED		F	source of frame content
src	img	%URI;	#REQUIRED			URI of image to embed
standby	object	%Text;	#IMPLIED			message to show while loading
start	ol	NUMBER	#IMPLIED	D	L	starting sequence number
style	All elements but base, basefont, head, html, meta, param, script, style, title	%StyleSheet;	#IMPLIED			associated style info
summary	table	%Text;	#IMPLIED			purpose/structure for speech output
tabindex	a, area, button, input, object, select, textarea	NUMBER	#IMPLIED			position in tabbing order
target	a, area, base, form, link	%FrameTarget;	#IMPLIED		L	render in this frame
text	body	%Color;	#IMPLIED	D	L	document text color
title	All elements but base, basefont, head, html, meta, param, script, title	%Text;	#IMPLIED			advisory title
type	a, link	%ContentType;	#IMPLIED			advisory content type
type	object	%ContentType;	#IMPLIED			content type for data
type	param	%ContentType;	#IMPLIED			content type for value when valuetype=ref
type	script	%ContentType;	#REQUIRED			content type of script language
type	style	%ContentType;	#REQUIRED			content type of style language
type	input	%InputType;	TEXT			what kind of widget is needed
type	li	%LIStyle;	#IMPLIED	D	L	list item style
type	ol	%OLStyle;	#IMPLIED	D	L	numbering style
type	ul	%ULStyle;	#IMPLIED	D	L	bullet style
type	button	(button \| submit \| reset)	submit			for use as form button
usemap	img, input, object	%URI;	#IMPLIED			use client-side image map
valign	col, colgroup, body, td, tfoot, th, Thead, tr	(top \| middle \| bottom \| baseline)	#IMPLIED			vertical alignment in cells
value	input	CDATA	#IMPLIED			Specify for radio buttons and checkboxes
value	option	CDATA	#IMPLIED			defaults to element content
value	param	CDATA	#IMPLIED			property value
value	button	CDATA	#IMPLIED			sent to server when submitted
value	li	NUMBER	#IMPLIED	D	L	reset sequence number
valuetype	param	(DATA \| REF \| object)	DATA			How to interpret value
version	html	CDATA	%html.Version;	D	L	Constant
vlink	body	%Color;	#IMPLIED	D	L	color of visited links
vspace	applet, img, object	%Pixels;	#IMPLIED	D	L	vertical gutter
width	hr	%Length;	#IMPLIED	D	L
width	iframe	%Length;	#IMPLIED		L	frame width
width	img, object	%Length;	#IMPLIED			override width
width	table	%Length;	#IMPLIED			table width
width	td, th	%Length;	#IMPLIED	D	L	width for cell
width	applet	%Length;	#REQUIRED	D	L	initial width
width	col	%MultiLength;	#IMPLIED			column width specification
width	colgroup	%MultiLength;	#IMPLIED			default width for enclosed cols
width	pre	NUMBER	#IMPLIED	D	L

The above reference was taken from the HTML 4.01 Specification, W3C Recommendation.