HTML 2.0 DTD:
Top element tree(s)

HTML

HTML
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 |_body
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 |  |_dir
 |  |  | (X): blockquote dir dl form isindex listing menu ol p pre ul xmp
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 |  |  |_li
 |  |     | (Xa): blockquote dir dl form isindex listing menu ol p pre ul xmp
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 |  |_dl
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 |  |  |_dt
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 |  |_em
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 |  |_form
 |  |  | (I): input select textarea
 |  |  | (X): form
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 |  |  |_#PCDATA
 |  |  |_a ...
 |  |  |_address ...
 |  |  |_b ...
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 |  |  |_dir ...
 |  |  |_dl ...
 |  |  |_em ...
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 |  |  |_h6 ...
 |  |  |_hr ...
 |  |  |_i ...
 |  |  |_img ...
 |  |  |_input
 |  |  |  | (Ia): input select textarea
 |  |  |  | (Xa): form
 |  |  |  |
 |  |  |  |_EMPTY
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 |  |  |_isindex ...
 |  |  |_kbd ...
 |  |  |_listing ...
 |  |  |_menu ...
 |  |  |_ol ...
 |  |  |_p ...
 |  |  |_pre ...
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 |  |  |_select
 |  |  |  | (Ia): input select textarea
 |  |  |  | (Xa): form
 |  |  |  |
 |  |  |  |_option
 |  |  |     | (Ia): input select textarea
 |  |  |     | (Xa): form
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 |  |  |     |_#PCDATA
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 |  |  |_strong ...
 |  |  |_textarea
 |  |  |  | (Ia): input select textarea
 |  |  |  | (Xa): form
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 |  |  |_tt ...
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 |  |_h1
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 |  |_h2
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 |  |_h3
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 |  |_h4
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 |  |_h5
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 |  |  |_#PCDATA
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 |  |_h6
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 |  |  |_#PCDATA
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 |  |_hr
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 |  |  |_EMPTY
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 |  |_i
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 |  |  |_a ...
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 |  |_img
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 |  |  |_EMPTY
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 |  |_isindex
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 |  |  |_EMPTY
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 |  |_kbd
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 |  |  |_#PCDATA
 |  |  |_a ...
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 |  |  |_cite ...
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 |  |  |_em ...
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 |  |_listing
 |  |  |
 |  |  |_CDATA
 |  | 
 |  |_menu
 |  |  | (X): blockquote dir dl form isindex listing menu ol p pre ul xmp
 |  |  |
 |  |  |_li ...
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 |  |_ol
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 |  |_p
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 |  |_pre
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 |  |  |_#PCDATA
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 |  |_samp
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 |  |  |_#PCDATA
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 |  |  |_em ...
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 |  |  |_tt ...
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 |  |_strong
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 |  |  |_#PCDATA
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 |  |_tt
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 |  |_ul
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 |  |  |_li ...
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 |  |_var
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 |  |_xmp
 |     |
 |     |_CDATA
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 |_head
 |  |
 |  |_base
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 |  |  |_EMPTY
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 |  |_isindex ...
 |  |_link
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 |  |  |_EMPTY
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 |  |_meta
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 |  |  |_EMPTY
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 |  |_nextid
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 |  |_title
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 |_plaintext
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    |_CDATA