| HTML 2.0 (RFC 1868) | HTML 2.x (RFC 2070) | HTML 3.2 | HTML 4.01 Transitional / Frameset | HTML 4.01 Strict | ISO-HTML | XHTML 1.0 FE Transitional | XHTML 1.0 FE Frameset | XHTML 1.0 FE Strict | XHTML 1.0 SE Transitional | XHTML 1.0 SE Frameset | XHTML 1.0 SE Strict | XHTML 1.1 (m12n 1.0 FE/SE DTD) | XHTML 1.1 + Legacy (m12n 1.0 FE/SE DTD) | XHTML m12n 1.0 FE/SE Abstract |
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h1 | | O | | O |
h2 |
h3 |
h4 |
h5 |
h6 |
tt | O |
i |
b |
u | O | | O | | O | | O | |
strike |
big | O | | O |
small |
sub | O |
sup |
em |
strong |
dfn |
code |
samp |
kbd |
var |
cite |
a |
img |
applet | O | | O | | O | | O |
font | O | |
basefont |
br | O |
script | O | | O |
map | O |
input |
select |
textarea |
p |
ul |
ol |
dir | O | | O | | O | | O | |
menu |
pre | O |
xmp | O | |
listing |
dl | O |
div |
center | O | | O | | O | | O | |
blockquote | O |
form |
isindex | O | | O | | O | | O | |
hr | O |
table |
address | O | | O |
noscript | | O |
noframes | O | | O | | O | | O | |
fieldset | O |
s | O | | O | | O | | O | |
abbr | O |
acronym |
object |
q |
span |
bdo |
iframe | O | | O | | O | | O |
label | O |
button |
ins | | O |
del |
ruby | | O | |