From:  ftp://ftp.cs.tcd.ie/isohtml/iso-html.dtd
Date:  970326

<!-- iso-html.dtd

     ISO HyperText Markup Language Document Type Definition,
     an SGML system conforming to International Standard ISO 8879.

 (C) International Organization for Standardization 1997

     Permission to copy in any form is granted for use with
     conforming systems and applications as defined in ISO 15xxx,
     provided this copyright notice is included in all copies.

-->

<!ENTITY % version "CD" >

                 <!-- Document structure -->

<!--      ELEMENTS    MIN  CONTENT  (EXEPTIONS) -->
<!ELEMENT ISO-HTML    - -  (HEAD, BODY) >
<!ELEMENT HEAD        - -  (TITLE & ISINDEX? & BASE?)
                              +(LINK | META | %head.extend;) >
<!ELEMENT TITLE       - -  (#PCDATA)
                              -(LINK | META | %head.extend;) >
<!ELEMENT ISINDEX     - O  EMPTY>
<!ELEMENT BASE        - O  EMPTY >
<!ELEMENT LINK        - O  EMPTY >
<!ELEMENT META        - O  EMPTY >
<!ELEMENT BODY        - -  (%section.content;, (H1,B1)* ) >
<!ELEMENT H1          - -  (%text;)* >
<!ELEMENT B1          O O  (%section.content;, (H2,B2)* ) >
<!ELEMENT H2          - -  (%text;)* >
<!ELEMENT B2          O O  (%section.content;, (H3,B3)* ) >
<!ELEMENT H3          - -  (%text;)* >
<!ELEMENT B3          O O  (%section.content;, (H4,B4)* ) >
<!ELEMENT H4          - -  (%text;)* >
<!ELEMENT B4          O O  (%section.content;, (H5,B5)* ) >
<!ELEMENT H5          - -  (%text;)* >
<!ELEMENT B5          O O  (%section.content;, (H6,B6)* ) >
<!ELEMENT H6          - -  (%text;)* >
<!ELEMENT B6          O O  (%section.content;) >
<!ELEMENT ADDRESS     - -  (%text; | P)+ >
<!ELEMENT P           - O  (%text;)+ >
<!ELEMENT (OL|UL)     - -  (LI)+ >
<!ELEMENT LI          - O  %section.content; >
<!ELEMENT DL          - -  (DT|DD)+ >
<!ELEMENT DT          - O  (%text;)+ >
<!ELEMENT DD          - O  %section.content >
<!ELEMENT PRE         - -  (%text;)+ -(BIG|IMG|MAP|SMALL|SUB|SUP|
                                       %body.extend;) >
<!ELEMENT DIV         - -  %section.content; >
<!ELEMENT BLOCKQUOTE  - -  %section.content; >
<!ELEMENT FORM        - -  %form.content; -(FORM) >
<!ELEMENT INPUT       - O  EMPTY >
<!ELEMENT SELECT      - -  (OPTION)+ >
<!ELEMENT OPTION      - O  (#PCDATA) >
<!ELEMENT TEXTAREA    - -  (#PCDATA) >
<!ELEMENT HR          - O  EMPTY >
<!ELEMENT TABLE       - -  (CAPTION?, TR+) >
<!ELEMENT CAPTION     - -  (%text;)+ >
<!ELEMENT TR          - O  (TH|TD)+ >
<!ELEMENT (TH|TD)     - O  %table.content; >
<!ELEMENT (%physical.styles;|%logical.styles;)
                      - -  (%text;)+ >
<!ELEMENT A           - -  (%text;)* -(A) >
<!ELEMENT IMG         - O  EMPTY >
<!ELEMENT OBJECT      - -  (PARAM | %section.content;)* >
<!ELEMENT PARAM       - O  EMPTY >
<!ELEMENT BR          - O  EMPTY >
<!ELEMENT MAP         - -  (AREA)+ >
<!ELEMENT AREA        - O  EMPTY >
<!ELEMENT SPAN        - -  (%text;)+ >
<!ELEMENT BDO         - -  (%text;)+ >
<!ELEMENT NOP         - O  EMPTY --for DTD internal use only -->

              <!-- Attribute definition lists -->

<!--      ELEMENTS NAME       VALUE       DEFAULT --> 
<!ATTLIST A        CHARSET    NAME       #IMPLIED -- MIME charset --
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   HREF       %URL;      #IMPLIED -- source anchor --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   NAME       CDATA      #IMPLIED -- target anchor --
                   REL        CDATA      #IMPLIED -- forward link types --
                   REV        CDATA      #IMPLIED -- reverse link types --
                   TITLE      CDATA      #IMPLIED -- advisory title str --
                   %a.addon; >
<!ATTLIST ADDRESS  ALIGN      %justify;  #IMPLIED -- text alignment --
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %address.addon; >
<!ATTLIST AREA     ALT        CDATA     #REQUIRED
                   COORDS     CDATA      #IMPLIED
                   -- comma separated list of numbers --
                   HREF       %URL;      #IMPLIED
                   NOHREF     (nohref)   #IMPLIED -- region has no action --
                   SHAPE      %shape;        rect
                   %area.addon; >
<!ATTLIST BASE     HREF       %URL      #REQUIRED
                   %base.addon; >
<!ATTLIST BDO      DIR        %dirn;    #REQUIRED
                   LANG       NAME       #IMPLIED
                   %bdo.addon; >
<!ATTLIST BLOCKQUOTE
                   ALIGN      %justify;  #IMPLIED -- text alignment --
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %blockquote.addon; >
<!ATTLIST BODY     CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %body.addon; >
<!ATTLIST BR       NOP        (nop)      #IMPLIED -- not for use in docs --
                   %br.addon; >
<!ATTLIST CAPTION  ALIGN      (top|bottom)
                                         #IMPLIED
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %caption.addon; >
<!ATTLIST DD       CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %dd.addon; >
<!ATTLIST DIV      ALIGN      %justify;  #IMPLIED -- text alignment --
                   %div.addon; >
<!ATTLIST DL       CLASS      NAMES      #IMPLIED -- element class --
                   COMPACT    (compact)  #IMPLIED
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %dl.addon; >
<!ATTLIST DT       CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %dt.addon; >
<!ATTLIST FORM     ACTION     %URL;     #REQUIRED -- server-side handler --
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ENCTYPE    %Content-Type;
                                        "application/x-www-form-urlencoded"
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   METHOD     %HTTP-Method;
                                              get -- see HTTP specification --
                   %form.addon; >
<!ATTLIST HR       ALIGN      %justify;  #IMPLIED
                   DIR        %dirn;     #IMPLIED -- text direction --
                   %hr.addon; >
<!ATTLIST HEAD     CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %head.addon; >
<!ATTLIST IMG      ALIGN      (top|middle|bottom|left|right)
                                         #IMPLIED -- wrt baseline --
                   ALT        CDATA     #REQUIRED -- in place of image --
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   ISMAP      (ismap)    #IMPLIED -- use server image map --
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   SRC        %URL;     #REQUIRED -- URL of image to embed --
                   USEMAP     %URL;      #IMPLIED -- client-side image map --
                   %img.addon;                    -- additional attributes -->
<!ATTLIST INPUT    CHECKED    (checked)  #IMPLIED -- for radio, checkbox --
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   MAXLENGTH  NUMBER     #IMPLIED
                   NAME       CDATA      #IMPLIED -- except submit, reset --
                   SIZE       CDATA      #IMPLIED -- specific to field type --
                   SRC        %URL;      #IMPLIED -- background image --
                   TYPE       %InputType;    text -- widget --
                   VALUE      CDATA      #IMPLIED -- for radio, checkbox --
                   %input.addon;                  -- additional attributes -->
<!ATTLIST ISINDEX  CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   PROMPT     CDATA      #IMPLIED -- prompt message --
                   %isindex.addon; >
<!ATTLIST ISO-HTML CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   VERSION    CDATA        #FIXED    %version;
                   %iso-html.addon; >
<!ATTLIST LI       ALIGN      %justify;  #IMPLIED -- text alignment --
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   VALUE      NUMBER     #IMPLIED -- reset sequence number --
                   %li.addon; >
<!ATTLIST LINK     CHARSET    NAME       #IMPLIED -- MIME charset --
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   HREF       %URL;      #IMPLIED
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   REL        CDATA      #IMPLIED -- forward link types --
                   REV        CDATA      #IMPLIED -- reverse link types --
                   TITLE      CDATA      #IMPLIED -- advisory title str --
                   %link.addon; >
<!ATTLIST MAP      NAME       CDATA     #REQUIRED
                   %map.addon; >
<!ATTLIST META     CONTENT    CDATA     #REQUIRED -- associated information --
                   HTTP-EQUIV NAME       #IMPLIED
                   -- HTTP response header name --
                   NAME       NAME       #IMPLIED -- metainformation name --
                   %meta.addon; >
<!ATTLIST OBJECT   ALIGN      (texttop,middle,textmiddle,baseline,
                               textbottom,left,center,centre,right)
                                         #IMPLIED -- positioning in doc --
                   CLASS      NAMES      #IMPLIED -- element class --
                   CLASSID    %URL;      #IMPLIED -- identifies implement. --
                   CODEBASE   %URL;      #IMPLIED -- needed by some systems --
                   CODETYPE   CDATA      #IMPLIED -- code media type --
                   DATA       %URL;      #IMPLIED -- ref to object's data --
                   DECLARE    (declare)  #IMPLIED -- dont instantiate --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   NAME       %URL;      #IMPLIED -- submit with form --
                   STANDBY    CDATA      #IMPLIED -- show msg while loading --
                   TYPE       CDATA      #IMPLIED -- data media type --
                   USEMAP     %URL;      #IMPLIED -- ref to image map --
                   %object.addon; >
<!ATTLIST OL       ALIGN      %justify;  #IMPLIED -- text alignment --
                   CLASS      NAMES      #IMPLIED -- element class --
                   COMPACT    (compact)  #IMPLIED
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   START      NUMBER     #IMPLIED -- start sequence number --
                   %ol.addon; >
<!ATTLIST OPTION   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   SELECTED   (selected) #IMPLIED
                   VALUE      CDATA      #IMPLIED -- defaults to content --
                   %option.addon; >
<!ATTLIST P        ALIGN      %justify;  #IMPLIED -- text alignment --
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %p.addon; >
<!ATTLIST PARAM    NAME       NAME      #REQUIRED -- name of parameter --
                   TYPE       CDATA      #IMPLIED -- Internet Media Type --
                   VALUE      CDATA      #IMPLIED -- value of parameter --
                   VALUETYPE  (data|ref|object)
                                             data -- interpret value as --
                   %param.addon; >
<!ATTLIST PRE      CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   WIDTH      NUMBER     #IMPLIED
                   %pre.addon; >
<!ATTLIST SELECT   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   MULTIPLE   (multiple) #IMPLIED
                   NAME       CDATA     #REQUIRED
                   SIZE       NUMBER     #IMPLIED
                   %select.addon; >
<!ATTLIST SPAN     CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %span.addon; >
<!ATTLIST TABLE    ALIGN      (left,center,centre,right)
                                             left -- posn. rel. to window --
                   BORDER     %pixels;   #IMPLIED -- frame around table --
                   CELLPADDING %pixels;  #IMPLIED -- spacing within cells --
                   CELLSPACING %pixels;  #IMPLIED -- spacing between cells --
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   DUMMY      (border)   #IMPLIED -- border w/o value --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   WIDTH      %length;   #IMPLIED
                   -- table width in pixels or relative to window --
                   %table.addon; >
<!ATTLIST TD       ALIGN      %justify;  #IMPLIED -- horizontal alignment --
                   CLASS      NAMES      #IMPLIED -- element class --
                   COLSPAN    NUMBER            1 -- cols spanned by cell --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   NOWRAP     (nowrap)   #IMPLIED -- suppress word wrap --
                   ROWSPAN    NUMBER            1 -- rows spanned by cell --
                   VALIGN     %valign;   #IMPLIED -- vertical alignment --
                   %td.addon; >
<!ATTLIST TEXTAREA CLASS      NAMES      #IMPLIED -- element class --
                   COLS       NUMBER    #REQUIRED
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   NAME       CDATA     #REQUIRED
                   ROWS       NUMBER    #REQUIRED
                   %textarea.addon; >
<!ATTLIST TH       ALIGN      %justify;  #IMPLIED -- horizontal alignment --
                   CLASS      NAMES      #IMPLIED -- element class --
                   COLSPAN    NUMBER            1 -- columns spanned by cell --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   NOWRAP     (nowrap)   #IMPLIED -- suppress word wrap --
                   ROWSPAN    NUMBER            1 -- rows spanned by cell --
                   VALIGN     %valign;   #IMPLIED -- vertical alignment --
                   %th.addon; >
<!ATTLIST TITLE    CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %title.addon; >
<!ATTLIST TR       ALIGN      %justify;  #IMPLIED -- horizontal alignment --
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   VALIGN     %valign;   #IMPLIED -- vertical alignment --
                   %tr.addon; >
<!ATTLIST UL       ALIGN      %justify;  #IMPLIED -- text alignment --
                   CLASS      NAMES      #IMPLIED -- element class --
                   COMPACT    (compact)  #IMPLIED
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %ul.addon; >

              <!-- Attribute group definition lists -->

<!ATTLIST (%physical.styles;)
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag--
                   %physical.style.addon; >

<!ATTLIST (%logical.styles;)
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %logical.style.addon; >

<!ATTLIST (H1 | H2 | H3 | H4 | H5 | H6)
                   ALIGN      %justify;  #IMPLIED -- text alignment --
                   CLASS      NAMES      #IMPLIED -- element class --
                   DIR        %dirn;     #IMPLIED -- text direction --
                   ID         ID         #IMPLIED
                   LANG       NAME       #IMPLIED -- RFC 1766 language tag --
                   %heading.addon; >

<!-- End of file -->