<!--	html.dtd

        Document Type Definition for the HyperText Markup Language
        as used by the World Wide Web application (HTML DTD).

        $Id: html.dtd,v 1.7.2.4 1994/04/07 00:33:25 connolly Exp $
-->


<!-- DTD definitions -->

<!ENTITY % URL "CDATA"
        -- The term URL means a CDATA attribute
           whose value is a Uniform Resource Locator,
           as defined. (A URN may also be usable here when defined.)
        -->

<!ENTITY % Content-Type "CDATA" -- meaning a MIME content type -->

<!ENTITY % linkattributes
        "HREF %URL;  #IMPLIED
        REL CDATA #IMPLIED -- forward relationship type --
        REV CDATA #IMPLIED -- reversed relationship type
                              to referent data:

                                PARENT CHILD, SIBLING, NEXT, TOP,
                                DEFINITION, UPDATE, ORIGINAL etc. --

        URN CDATA #IMPLIED -- universal resource number --

        TITLE CDATA #IMPLIED -- advisory only --

        METHODS NAMES #IMPLIED -- supported public methods of the object:
                                        TEXTSEARCH, GET, HEAD, ... --

	--@# content-type --
        ">


<!-- Document Element -->

<!ELEMENT HTML O O  (HEAD, BODY)>

<!-- Head -->

<!ELEMENT HEAD O O  ( TITLE?  & ISINDEX? & NEXTID? & LINK*
                              & BASE?)>

<!ELEMENT NEXTID - O EMPTY -- @# obsolete -->
<!ATTLIST NEXTID
	N ID #REQUIRED -- next available id -->

<!ELEMENT TITLE - -  (#PCDATA)
          -- The TITLE element is not considered part of the flow of text.
             It should be displayed, for example as the page header or
             window title.
          -->

<!ELEMENT ISINDEX - O EMPTY
          -- WWW clients should offer the option to perform a search on
             documents containing ISINDEX.
          -->

<!ELEMENT LINK - O EMPTY>
<!ATTLIST LINK
        %linkattributes
	>
        
<!ELEMENT BASE - O EMPTY    -- Reference context for URLS -->
<!ATTLIST BASE
        HREF %URL; #IMPLIED
        >


<!-- Body -->

<!ELEMENT BODY O O  ANY -- empty P version @# -->

<!-- Text -->

<!ENTITY % inline "EM | STRONG |
                        CODE | SAMP | KBD | KEY | VAR | DFN | CITE "
        >
<!ENTITY % fonts "B | I | U | TT">

<!ENTITY % text "#PCDATA | IMG | %inline; | %fonts; | BR | P"
	-- @# yuk: P in textflows --
	 --@# BR -> &br; --
	 --@# yuk: fonts -- >

<!ENTITY % htext "A | %text"    -- Plus links, no structure -->

<!ELEMENT (%inline;) - - (%htext)+>
<!ELEMENT (%fonts;)  - - (%htext)+>

<!ELEMENT A     - -  ANY -(A)>
<!ATTLIST A
	NAME NMTOKEN #IMPLIED -- @# dangit! this should be ID! --
	%linkattributes;
        >

<!ELEMENT IMG    - O EMPTY --  Embedded image -->
<!ATTLIST IMG
        SRC %URL;  #IMPLIED     -- URL of document to embed --
	ALT CDATA #IMPLIED
	ALIGN (top|middle|bottom|left|center|right) #IMPLIED --@#supported?--
        >


<!ELEMENT P     - O EMPTY -- paragraph separator @# -->
<!ELEMENT HR    - O EMPTY -- horizontal rule -->
<!ELEMENT BR    - O EMPTY -- @# BR -> &br; -->

<!-- Headings -->

<!ENTITY % heading "H1|H2|H3|H4|H5|H6" >
<!ELEMENT ( %heading )  - -  (%htext;)+>


<!-- Pre-formatted Text -->

<!ENTITY % pre "PRE | XMP | LISTING" -- @# treat XMP like pre? -->

<!ELEMENT PRE - - (#PCDATA | %fonts | %inline | A | BR)+>
		<!-- @# yuk: VAR, CITE etc. in PRE -->
		<!-- @# P in PRE ??-->
		<!-- @# BR -> &br; -->
<!ELEMENT (XMP|LISTING) - - RCDATA>
<!-- @# PLAINTEXT?? -->
<!ATTLIST (%pre;)
        WIDTH NUMBER #implied
        >

<!-- Block Elements -->

<!ENTITY % list " UL | OL | DIR | MENU ">

<!ENTITY % block                -- as htext but also nested structure --
                        "HR | %list | DL
                        | %pre; | BLOCKQUOTE | FIG | ADDRESS 
			| FORM">

<!ELEMENT DL    - -  (DT*, DD?)+>
<!ATTLIST DL
	STYLE (COMPACT) #IMPLIED>

<!ELEMENT DT    - O (%htext)+>
<!ELEMENT DD    - O (%htext|%block)+>

<!ELEMENT (%list) - -  (LI)+>
<!ELEMENT LI    - O (%htext|%block)+>

<!ELEMENT BLOCKQUOTE - - ((%htext)+, ADDRESS?)+ -- @# Hmm... --
        -- for quoting some other source -->

<!ELEMENT ADDRESS - - (%htext;)+>

<!ELEMENT FIG - - (%htext;)+>

<!-- Forms  -->

<!ENTITY % HTTP-Method "(GET | POST)">
<!ELEMENT FORM - - ANY -(FORM) +(INPUT|SELECT|TEXTAREA)>
<!ATTLIST FORM
	ACTION %URL #REQUIRED
	METHOD %HTTP-Method #IMPLIED -- @# MAILTO? --
	ENCTYPE %Content-Type; #IMPLIED
	>

<!ENTITY % InputType "(TEXT | PASSWORD | CHECKBOX |
			RADIO | SUBMIT | RESET |
			IMAGE | HIDDEN )">
<!ELEMENT INPUT - O EMPTY>
<!ATTLIST INPUT
	TYPE %InputType #IMPLIED -- @# defaults to TEXT?? --
	NAME CDATA #IMPLIED -- required for all but submit and reset --
	VALUE CDATA #IMPLIED
	SRC %URL #IMPLIED -- for image inputs -- 
	STATE (CHECKED) #IMPLIED
	SIZE CDATA #IMPLIED -- @# should be NUMBERS: delimit with space, not comma --
	MAXLENGTH NUMBER #IMPLIED
	ALIGN (top|middle|bottom|left|center|right) #IMPLIED --@#supported?--
	>

<!ELEMENT SELECT - - (OPTION+)>
<!ATTLIST SELECT
	NAME CDATA #REQUIRED
	SIZE NUMBER #IMPLIED
	SELECTIONS (MULTIPLE) #IMPLIED
	>

<!ELEMENT OPTION - O (#PCDATA)>
<!ATTLIST OPTION
	STATE (SELECTED) #IMPLIED
	VALUE CDATA #IMPLIED
	>

<!ELEMENT TEXTAREA - - (#PCDATA)>
<!ATTLIST TEXTAREA
	NAME CDATA #REQUIRED
	ROWS NUMBER #REQUIRED -- @#implied? --
	COLS NUMBER #REQUIRED
	>

<!-- Mnemonic character entities. -->

<!ENTITY % ISOlat1 PUBLIC
  "ISO 8879:1986//ENTITIES Added Latin 1//EN">
%ISOlat1;

<!ENTITY amp "&#38;"     -- ampersand -->
<!ENTITY gt "&#62;"      -- greater than -->
<!ENTITY lt "&#60;"      -- less than -->
<!ENTITY nbsp "<? nonbreaking-space>">
<!-- @# should add entites for processing instructions
	for line break, centering, etc. -->