Section A.2. The Grammar
The grammar is a composite of the HTML 4.01 and XHTML 1.0 standard tags and special extensions to the language as supported by the latest versions of Netscape Navigator and Microsoft Internet Explorer.
The rules are in alphabetical order. The starting rule for an entire document is named html_document.
|
a_content[A] |
::= |
heading |
|
| |
text |
|
|
a_tag |
::= |
<a> |
| {a_content }0 | ||
| </a> | ||
|
abbr_tag |
::= |
<abbr> text </abbr> |
|
acronym_tag |
::= |
<acronym> text </acronym> |
|
address_content |
::= |
p_tag |
|
| |
text |
|
|
address_tag |
::= |
<address> |
| {address_content }0 | ||
| </address> | ||
|
applet_content |
::= |
{<param>}0 |
| body_content | ||
|
applet_tag |
::= |
<applet> applet_content </applet> |
|
b_tag |
::= |
<b> text </b> |
|
basefont_tag |
::= |
<basefont> body_content </basefont> |
|
bdo_tag |
::= |
<bdo> text </bdo> |
|
big_tag |
::= |
<big> text </big> |
|
blink_tag |
::= |
<blink> text </blink> |
|
block |
::= |
{block_content }0 |
|
block_content |
::= |
<isindex> |
|
| |
basefont_tag |
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| |
blockquote_tag |
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| |
center_tag |
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dir_tag |
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| |
div_tag |
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| |
dl_tag |
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form_tag |
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| |
listing_tag |
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menu_tag |
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| |
multicol_tag |
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nobr_tag |
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ol_tag |
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p_tag |
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pre_tag |
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| |
table_tag |
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| |
ul_tag |
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| |
xmp_tag |
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blockquote_tag |
::= |
<blockquote> body_content </blockquote> |
|
body_content |
::= |
<bgsound> |
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| |
<hr> |
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address_tag |
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block |
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del_tag |
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heading |
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ins_tag |
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layer_tag |
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map_tag |
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| |
marquee_tag |
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| |
text |
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|
body_tag |
::= |
<body> |
| {body_content }0 | ||
| </body> | ||
|
caption_tag |
::= |
<caption> body_content </caption> |
|
center_tag |
::= |
<center> body_content </center> |
|
cite_tag |
::= |
<cite> text </cite> |
|
code_tag |
::= |
<code> text </code> |
|
colgroup_content |
::= |
{<col>}0 |
|
colgroup_tag |
::= |
<colgroup> |
|
colgroup_content |
||
|
content_style |
::= |
abbr_tag |
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| |
acronym_tag |
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| |
cite_tag |
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| |
code_tag |
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| |
dfn_tag |
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em_tag |
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| |
kbd_tag |
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| |
q_tag |
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| |
strong_tag |
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| |
var_tag |
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dd_tag |
::= |
<dd> flow </dd> |
|
del_tag |
::= |
<del> flow </del> |
|
dfn_tag |
::= |
<dfn> text </dfn> |
|
dir_tag[B] |
::= |
<dir> |
| { li_tag } | ||
| </dir> | ||
|
div_tag |
::= |
<div> body_content </div> |
|
dl_content |
::= |
dt_tag dd_tag |
|
dl_tag |
::= |
<dl> |
| {dl_content } | ||
| </dl> | ||
|
dt_tag |
::= |
<dt> |
| text | ||
| </dt> | ||
|
em_tag |
::= |
<em> text </em> |
|
fieldset_tag |
::= |
<fieldset> |
| [ legend_tag ] | ||
| { form_content }0 | ||
| </fieldset> | ||
|
flow |
::= |
{flow_content }0 |
|
flow_content |
::= |
block |
|
| |
text |
|
|
font_tag |
::= |
<font> style_text </font> |
|
form_content[C] |
::= |
<input> |
|
| |
<keygen> |
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| |
body_content |
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| |
fieldset_tag |
|
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| |
label_tag |
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| |
select_tag |
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| |
textarea_tag |
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|
form_tag |
::= |
<form> |
| {form_content }0 | ||
| </form> | ||
|
frameset_content |
::= |
<frame> |
|
| |
noframes_tag |
|
|
frameset_tag |
::= |
<frameset> |
| {frameset_content }0 | ||
| </frameset> | ||
|
h1_tag |
::= |
<h1> text </h1> |
|
h2_tag |
::= |
<h2> text </h2> |
|
h3_tag |
::= |
<h3> text </h3> |
|
h4_tag |
::= |
<h4> text </h4> |
|
h5_tag |
::= |
<h5> text </h5> |
|
h6_tag |
::= |
<h6> text </h6> |
|
head_content |
::= |
<base> |
|
| |
<isindex> |
|
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| |
<link> |
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| |
<meta> |
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| |
<nextid> |
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| |
style_tag |
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| |
title_tag |
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|
head_tag |
::= |
<head> |
| {head_content }0 | ||
| </head> | ||
|
heading |
::= |
h1_tag |
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| |
h2_tag |
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h3_tag |
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h4_tag |
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h5_tag |
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h6_tag |
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html_content |
::= |
head_tag body_tag |
|
| |
head_tag frameset_tag |
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|
html_document |
::= |
html_tag |
|
html_tag |
::= |
<html> html_content </html> |
|
i_tag |
::= |
<i> text </i> |
|
ilayer_tag |
::= |
<ilayer> body_content </ilayer> |
|
ins_tag |
::= |
<ins> flow </ins> |
|
kbd_tag |
::= |
<kbd> text </kbd> |
|
label_content[D] |
::= |
<input> |
|
| |
body_content |
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| |
select_tag |
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| |
textarea_tag |
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|
label_tag |
::= |
<label> |
| {label_content }0 | ||
| </label> | ||
|
layer_tag |
::= |
<layer> body_content </layer> |
|
legend_tag |
::= |
<legend> text </legend> |
|
li_tag |
::= |
<li> flow </li> |
|
listing_tag |
::= |
<listing> literal_text </listing> |
|
map_content |
::= |
{<area>}0 |
|
map_tag |
::= |
<map> map_content </map> |
|
marquee_tag |
::= |
<marquee> style_text </marquee> |
|
menu_tag[E] |
::= |
<menu> |
| {li_tag }0 | ||
| </menu> | ||
|
multicol_tag |
::= |
<multicol> body_content </multicol> |
|
nobr_tag |
::= |
<nobr> text </nobr> |
|
noembed_tag |
::= |
<noembed> text </noembed> |
|
noframes_tag |
::= |
<noframes> |
| {body_content }0 | ||
| </noframes> | ||
|
noscript_tag |
::= |
<noscript> text </noscript> |
|
object_content |
::= |
{<param>}0 |
| body_content | ||
|
object_tag |
::= |
<object> object_content </object> |
|
ol_tag |
::= |
<ol> |
| {li_tag } | ||
| </ol> | ||
|
optgroup_tag |
::= |
<optgroup> |
| {option_tag }0 | ||
| </optgroup> | ||
|
option_tag |
::= |
<option> plain_text </option> |
|
p_tag |
::= |
<p> text </p> |
|
physical_style |
::= |
b_tag |
|
| |
bdo_tag |
|
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| |
big_tag |
|
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| |
blink_tag |
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| |
font_tag |
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| |
i_tag |
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s_tag |
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small_tag |
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span_tag |
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strike_tag |
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sub_tag |
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sup_tag |
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tt_tag |
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| |
u_tag |
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|
pre_content |
::= |
<br> |
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| |
<hr> |
|
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| |
a_tag |
|
|
| |
style_text |
|
|
pre_tag |
::= |
<pre> |
| {pre_content }0 | ||
| </pre> | ||
|
q_tag |
::= |
<q> text </q> |
|
s_tag |
::= |
<s> text </s> |
|
samp_tag |
::= |
<samp> text </samp> |
|
script_tag[F] |
::= |
<script> plain_text </script> |
|
select_content |
::= |
optgroup_tag |
|
| |
option_tag |
|
|
select_tag |
::= |
<select> |
| {select_content}0 | ||
| </select> | ||
|
server_tag [G] |
::= |
<server> plain_text </server> |
|
small_tag |
::= |
<small> text </small> |
|
span_tag |
::= |
<span> text </span> |
|
strike_tag |
::= |
<strike> text </strike> |
|
strong_tag |
::= |
<strong> text </strong> |
|
style_tag |
::= |
<style> plain_text </style> |
|
sub_tag |
::= |
<sub> text </sub> |
|
sup_tag |
::= |
<sup> text </sup> |
|
table_cell |
::= |
td_tag |
|
| |
th_tag |
|
|
table_content |
::= |
<tbody> |
|
| |
<tfoot> |
|
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| |
<thead> |
|
|
| |
tr_tag |
|
|
table_tag |
::= |
<table> |
| [caption_tag ] | ||
| {colgroup_tag }0 | ||
| {table_content }0 | ||
| </table> | ||
|
td_tag |
::= |
<td> body_content </td> |
|
text |
::= |
{text_content }0 |
|
text_content |
::= |
<br> |
|
| |
<embed> |
|
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| |
<iframe> |
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| |
<img> |
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| |
<spacer> |
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| |
<wbr> |
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| |
a_tag |
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| |
applet_tag |
|
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| |
content_style |
|
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| |
ilayer_tag |
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| |
noembed_tag |
|
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| |
noscript_tag |
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| |
object_tag |
|
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| |
physical_style |
|
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| |
plain_text |
|
|
textarea_tag |
::= |
<textarea> plain_text </textarea> |
|
th_tag |
::= |
<th> body_content </th> |
|
title_tag |
::= |
<title> plain_text </title> |
|
tr_tag |
::= |
<tr> |
| {table_cell }0 | ||
| </tr> | ||
|
tt_tag |
::= |
<tt> text </tt> |
|
u_tag |
::= |
<u> text </u> |
|
ul_tag |
::= |
<ul> |
| {li_tag } | ||
| </ul> | ||
|
var_tag |
::= |
<var> text </var> |
|
xmp_tag |
::= |
<xmp> literal_text </xmp> |
[A] a_content may not contain a_tags; you may not nest <a> tags within other <a> tags.
[B] * The li_tag within the dir_tag may not contain any element found in a block.
[C] form_content may not contain form_tags; you may not nest one <form> within another <form>.
[D] As with the <form> tag, you cannot embed <form> or <label> tags within a <label> tag.
[E] The li_tag within the menu_tag may not contain any element found in a block.
[F] A script_tag may be placed anywhere within an HTML document, without regard to syntactic rules.
[G] A server_tag may be placed anywhere within an HTML document, without regard to syntactic rules.
