The Difference Between HTML and XHTML
From its very beginning, Hypertext
Markup Language is what has made the World Wide Web possible. It both conveys
the thoughts of the person who created the page and defines nearly every aspect
of what we see on each and every web page visited. Like English, French,
Spanish, Japanese, Russian, or any other language in use today, it is a living
language, evolving and growing.
Early on, this growth was fast and sudden, with "features"
often doing an end-run around the World Wide Web Consortium. Add to that the
fact that many of the designers of web pages play fast and loose in an effort to
have more content than the next guy. So what if some corners were cut? It was
all about content, and content was king.
Enter XHTML, considered by some as an effort to reign in the
Wild West approach to web development by making HTML a dialect of XML. XHTML
came in three flavors: transitional, strict, and frameset, with each flavor
offering either different capabilities or different degrees of conformance to
the XML standard.
Description
|
Deprecated
|
Attributes
| |
|---|---|---|---|
a
|
Anchor
|
accesskey, charset, class, coords, dir, href, hreflang, id,
lang, name, onblur, onclick, ondblclick, onfocus, onkeydown, onkeypress,
onkeyup, onmousedown, onmousemove, onmouseout, onmouseover, onmouseup, rel, rev,
shape, style, tabindex, target, title, type
| |
abbr
|
Abbreviated
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
acronym
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| ||
address
|
Author information
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
applet
|
Java applet
|
Yes
|
align, alt, archive, class, code, codebase, height, hspace,
id, name, object, style, title, vspace, width
|
area
|
Client-side image map area
|
accesskey, alt, class, coords, dir, href, id, lang, nohref,
onblur, onclick, ondblclick, onfocus, onkeydown, onkeypress, onkeyup,
onmousedown, onmousemove, onmouseout, onmouseover, onmouseup, shape, style,
tabindex, target, title
| |
b
|
Bold
|
class, dir, id, lang, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
Base URI of document
|
href, lang, target
| ||
basefont
|
Document base font size
|
Yes
|
color, face, id, size
|
bdo
|
BiDi override
|
class, id, lang, style, title
| |
big
|
Large text
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
blockqoute
|
Block quotation
|
cite
| |
body
|
Document body
|
alink, background, bgcolor, class, dir, id, lang, link,
onclick, ondblclick, onkeydown, onkeypress, onkeyup, onload, onmousedown,
onmousemove, onmouseout, onmouseover, onmouseup, onunload, style, text, title,
vlink
| |
br
|
Line break
|
class, clear, id, style, title
| |
button
|
Button object
|
accesskey, class, dir, disabled, id, lang, name, onblur,
onclick, ondblclick, onfocus, onkeydown, onkeypress, onkeyup, onmousedown,
onmousemove, onmouseout, onmouseover, onmouseup, style, tabindex, title, type,
value
| |
caption
|
Table caption
|
align, class, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style and title
| |
center
|
Center contents
|
Yes
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
|
Code fragment
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| ||
col
|
Table column
|
align, char, charoff, class, dir, id, lang, onclick,
ondblclick, onkeydown, onkeypress, onkeyup, onmousedown, onmousemove,
onmouseout, onmouseover, onmouseup, style, title, valign, width
| |
colgroup
|
Table column group
|
align, char, charoff, class, dir, id, lang, onclick,
ondblclick, onkeydown, onkeypress, onkeyup, onmousedown, onmousemove,
onmouseout, onmouseover, onmouseup, span, style, title, valign, width
| |
dd
|
Definition description
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
del
|
Deleted text
|
cite, class, datetime, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| |
dfn
|
Instance definition
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
dir
|
Directory list
|
Yes
|
class, compact, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
|
Style container
|
align, class, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| ||
dl
|
Definition list
|
class, compact, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| |
dt
|
Definition term
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
em
|
Emphasis
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
fieldset
|
Form control group
|
class, dir, id, lang, style, title
| |
font
|
Font change
|
Yes
|
class, color, dir, face, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, size, style, title
|
form
|
Input form
|
accept-charset, accept, action, class, dir, enctype, id,
lang, method, name, onclick, ondblclick, onkeydown, onkeypress, onkeyup,
onmousedown, onmousemove, onmouseout, onmouseover, onmouseup, onreset, onsubmit,
style, target, title
| |
frame
|
Frameset window
|
class, frameborder, id, longdesc, marginheight,
marginwidth, name, noresize, scrolling, src, style, title,
width
| |
Collection of window subdivisions
|
class, cols, id, onload, onunload, style, title
| ||
h1
|
Heading
|
align, class, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| |
h2
|
Heading
|
align, class, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| |
h3
|
Heading
|
align, class, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| |
H4
|
Heading
|
align, class, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| |
H5
|
Heading
|
align, class, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| |
h6
|
Heading
|
align, class, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| |
head
|
HTML document head
|
dir, lang, profile
| |
Horizontal rule
|
align, class, dir, id, lang, noshade, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, size, style, title, width
| ||
html
|
HTML document root
|
dir, lang, version
| |
i
|
Italic
|
class, dir, id, lang, marginwidth, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| |
iframe
|
Inline frame
|
align, class, frameborder, height, id, longdesc,
marginheight, name, scrolling, src, style, title
| |
img
|
Embedded image
|
align, alt, border, class, dir, height, hspace, id, ismap,
lang, longdesc, name, onclick, ondblclick, onkeydown, onkeypress, onkeyup,
onmousedown, onmousemove, onmouseout, onmouseover, onmouseup, src, style, title,
usemap, vspace, width
| |
input
|
Form input control
|
accept, accesskey, align, alt, checked, class, dir,
disabled, id, ismap, lang, maxlength, name, onblur, onchange, onclick,
ondblclick, onfocus, onkeydown, onkeypress, onkeyup, onmousedown, onmousemove,
onmouseout, onmouseover, onmouseup, onselect, readonly, size, src, style,
tabindex, title, type, usemap, value
| |
Inserted text
|
cite, class, datetime, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| ||
isindex
|
Single-line input prompt
|
Yes
|
class, dir, id, lang, prompt, style, title
|
kbd
|
Keyboard text entry
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
label
|
Form text field
|
accesskey, for, onblur, onfocus
| |
legend
|
Fieldset legend
|
accesskey, align, class, dir, id, lang, onclick,
ondblclick, onkeydown, onkeypress, onkeyup, onmousedown, onmousemove,
onmouseout, onmouseover, onmouseup, style, title
| |
li
|
List item
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, style, title, title, type, value
| |
link
|
Media-independent link
|
charset, class, dir, href, hreflang, id, lang, media,
onclick, ondblclick, onkeydown, onkeypress, onkeyup, onmousedown, onmousemove,
onmouseout, onmouseover, onmouseup, rel, rev, style, target, title
| |
map
|
Client-side image map
|
class, dir, id, lang, name, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
Menu list
|
Yes
|
class, compact, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| |
meta
|
Document meta-information
|
content, dir, http-equiv, lang, name, scheme
| |
noframes
|
Alternate text when frames are not supported
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup,onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
noscript
|
Alternate text when JavaScript is not supported
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
object
|
Embedded object
|
align, archive, border, class, classid, codebase, codetype,
data, declare, dir, height, hspace, id, lang, name, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, standby, style, tabindex, title, usemap, vspace,
width
| |
ol
|
Ordered list
|
class, compact, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, start, style, style, title, title, type
| |
optgroup
|
Option group
|
class, dir, disabled, id, label, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| |
Select option
|
class, dir, disabled, id, label, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, selected, style, title, value
| ||
p
|
Paragraph
|
align, class, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title
| |
param
|
Applet/object parameter
|
id, name, type, value, valuetype
| |
pre
|
Preformatted text
|
class, dir, id, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title, width
| |
q
|
Inline quotation
|
cite, class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
s
|
Strike-through
|
Yes
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
|
samp
|
Sample
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
script
|
Container for scripts
|
charset, defer, language, src, type
| |
Option select
|
class, dir, disabled, id, lang, multiple, onblur, onchange,
onclick, ondblclick, onfocus, onkeydown, onkeypress, onkeyup, onmousedown,
onmousemove, onmouseout, onmouseover, onmouseup, size, style, tabindex,
title
| ||
small
|
Small text
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
span
|
Style container
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
strike
|
Strike-through
|
Yes
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
|
strong
|
Strong emphasis
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
style
|
CSS
|
class, dir, lang, media, type
| |
sub
|
Subscript
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
sup
|
Superscript
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
HTML table
|
align, bgcolor, border, cellpadding, cellspacing, class,
dir, frame, id, lang, onclick, ondblclick, onkeydown, onkeypress, onkeyup,
onmousedown, onmousemove, onmouseout, onmouseover, onmouseup, rules, style,
summary, title, width
| ||
tbody
|
Table body
|
align, char, charoff, class, dir, id, lang, onclick,
ondblclick, onkeydown, onkeypress, onkeyup, onmousedown, onmousemove,
onmouseout, onmouseover, onmouseup, style, title, valign
| |
TD
|
Table data cell
|
abbr, align, axis, bgcolor, char, charoff, class, colspan,
dir, headers, height, id, id, lang, nowrap, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, rowspan, scope, style, title, valign, width
| |
textarea
|
Multiline text-input area
|
accesskey, class, cols, dir, disabled, id, lang, name,
onblur, onchange, onclick, ondblclick, onfocus, onkeydown, onkeypress, onkeyup,
onmousedown, onmousemove, onmouseout, onmouseover, onmouseup, onselect,
readonly, rows, style, tabindex, title
| |
tfoot
|
Table footer
|
align, char, charoff, class, dir, id, lang, onclick,
ondblclick, onkeydown, onkeypress, onkeyup, onmousedown, onmousemove,
onmouseout, onmouseover, onmouseup, style, title, valign
| |
Table header cell
|
abbr, align, axis, bgcolor, char, charoff, class, colspan,
dir, headers, height, id, lang, nowrap, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, rowspan, scope, style, title, valign
| ||
thead
|
Table header
|
align, char, charoff, class, dir, id, lang, onclick,
ondblclick, onkeydown, onkeypress, onkeyup, onmousedown, onmousemove,
onmouseout, onmouseover, onmouseup, style, title, valign, width
| |
title
|
Document title
|
cite, class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
tr
|
Table row
|
align, bgcolor, char, charoff, class, dir, id, lang,
onclick, ondblclick, onkeydown, onkeypress, onkeyup, onmousedown, onmousemove,
onmouseout, onmouseover, onmouseup, style, title, valign
| |
tt
|
Teletype text style
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
| |
u
|
Underlined
|
Yes
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
|
ul
|
Unordered list
|
class, compact, dir, id, lang, onclick, ondblclick,
onkeydown, onkeypress, onkeyup, onmousedown, onmousemove, onmouseout,
onmouseover, onmouseup, style, title, type
| |
var
|
Variable
|
class, dir, id, lang, onclick, ondblclick, onkeydown,
onkeypress, onkeyup, onmousedown, onmousemove, onmouseout, onmouseover,
onmouseup, style, title
|
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