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Book HomeHTML & XHTML: The Definitive GuideSearch this book

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's Internet Explorer.

The rules are in alphabetical order. The starting rule for an entire document is named html_document.

a_tag

::=

<a>

   

{a_content }0

   

</a>

a_content[89]

[89]a_content may not contain a_tags;
you may not nest <a> tags
within other <a> tags.

::=

heading

 

|

text

abbr_tag

::=

<abbr> text </abbr>

acronym_tag

::=

<acronym> text </acronym>

address_tag

::=

<address>

   

{address_content }0

   

</address>

address_content

::=

p_tag

 

|

text

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

 

|

blockquote_tag

 

|

center_tag

 

|

dir_tag

 

|

div_tag

 

|

dl_tag

 

|

form_tag

 

|

listing_tag

 

|

menu_tag

 

|

multicol_tag

 

|

nobr_tag

 

|

ol_tag

 

|

p_tag

 

|

pre_tag

 

|

table_tag

 

|

ul_tag

 

|

xmp_tag

blockquote_tag

::=

<blockquote>

   

body_content

   

</blockquote>

body_content

::=

<bgsound>

 

|

<hr>

 

|

address_tag

 

|

block

 

|

del_tag

 

|

heading

 

|

ins_tag

 

|

layer_tag

 

|

map_tag

 

|

marquee_tag

 

|

text

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

 

|

acronym_tag

 

|

cite_tag

 

|

code_tag

 

|

dfn_tag

 

|

em_tag

 

|

kbd_tag

 

|

q_tag

 

|

strong_tag

 

|

var_tag

dd_tag

::=

<dd>

   

flow

   

</dd>

del_tag

::=

<del>

   

flow

   

</del>

dfn_tag

::=

<dfn> text </dfn>

dir_tag[90]

[90]The li_tag within the dir_tag
may not contain any element found in a block.

::=

<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[91]

[91]form_content may not contain form_tags;
you may not nest one <form>
within another <form>.

::=

<input>

 

|

<keygen>

 

|

body_content

 

|

fieldset_tag

 

|

label_tag

 

|

select_tag

 

|

textarea_tag

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>

 

|

<link>

 

|

<meta>

 

|

<nextid>

 

|

style_tag

 

|

title_tag

|

script_tag

head_tag

::=

<head>

   

{head_content }0

   

</head>

heading

::=

h1_tag

 

|

h2_tag

 

|

h3_tag

 

|

h4_tag

 

|

h5_tag

 

|

h6_tag

html_content

::=

head_tag body_tag

 

|

head_tag frameset_tag

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[92]

[92]As with the <form> tag, you cannot imbed
<form> or <label> tags within a <label> tag.

::=

<input>

 

|

body_content

 

|

select_tag

 

|

textarea_tag

label_tag

::=

<label>

   

{label_content }0

   

</form>

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[93]

[93]The li_tag within the menu_tag
may not contain any element found in a block.

::=

<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

 

|

big_tag

 

|

blink_tag

 

|

font_tag

 

|

i_tag

 

|

s_tag

 

|

small_tag

 

|

span_tag

 

|

strike_tag

 

|

sub_tag

 

|

sup_tag

 

|

tt_tag

 

|

u_tag

pre_content

::=

<br>

 

|

<hr>

 

|

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[94]

[94]A script_tag may be placed anywhere within
an HTML document, without regard to syntactic rules.

::=

<script> plain_text </script>

select_content

::=

optgroup_tag

 

|

option_tag

select_tag

::=

<select>

   

{select_content}0

   

</select>

server_tag[95]

[95]A server_tag may be placed anywhere within an
HTML document, without regard to syntactic rules.

::=

<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>

 

|

<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>

 

|

<iframe>

 

|

<img>

 

|

<spacer>

 

|

<wbr>

 

|

a_tag

 

|

applet_tag

 

|

content_style

 

|

ilayer_tag

 

|

noembed_tag

 

|

noscript_tag

 

|

object_tag

 

|

plain_text

 

|

physical_style

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>

[89]a_content may not contain a_tags; you may not nest <a> tags within other <a> tags.

[90]The li_tag within the dir_tag may not contain any element found in a block.

[91]form_content may not contain form_tags; you may not nest one <form> within another <form>.

[92]As with the <form> tag, you cannot imbed
<form> or <label> tags within a <label> tag.

[93]The li_tag within the menu_tag may not contain any element found in a block.

[94]A script_tag may be placed anywhere within an HTML document, without regard to syntactic rules.

[95]A server_tag may be placed anywhere within an HTML document, without regard to syntactic rules.



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