HTML and CSS Reference
In-Depth Information
HTML
Archaeology
We did some digging and found some old HTML 4.01 and XHTML 1.1
pages. These pages use a doctype, at the very top of the HTML file, to tell
the browser which version of HTML they're using. We've snipped out a
couple of doctypes for you to look at. Check them out below…
This part says
we're
using HTML ve
rsion
4.01 and that
HTML
markup is writt
en in
English.
This j
ust
means
the
HTM
L 4.01
stand
ard
is pub
licly
availa
ble.
This
mea
ns
tha
t <ht
ml>
is t
he ro
ot
(fir
st) e
lemen
t
in y
our p
age.
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
N
otice
that
this is
NOT
an HT
ML
el
ement
. It h
as a “
!” aft
er th
e “<”
This poin
ts to a file
that ide
ntifies this
particula
r standard.
at
the
beginn
ing, w
hich t
ells y
ou
t
his is
somet
hing d
iffere
nt.
It's still
a version of
HTML—
an XML version.
Just
like t
he HT
ML D
OCTY
PE,
this
is a p
ublic d
ocume
nt ty
pe.
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
And it has a URL pointing t
o the
definition of XHTML 1.1.
For more on XHTML
, check out the appen
dix.