📄 html.dtd
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<!-- html.dtd Document Type Definition for the HyperText Markup Language (HTML DTD) $Id: html.dtd,v 1.30 1995/09/21 23:30:19 connolly Exp $ Author: Daniel W. Connolly <connolly@w3.org> See Also: html.decl, html-1.dtd http://www.w3.org/hypertext/WWW/MarkUp/MarkUp.html--><!ENTITY % HTML.Version "-//IETF//DTD HTML 2.0//EN" -- Typical usage: <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> <html> ... </html> -- ><!--============ Feature Test Entities ========================--><!ENTITY % HTML.Recommended "IGNORE" -- Certain features of the language are necessary for compatibility with widespread usage, but they may compromise the structural integrity of a document. This feature test entity enables a more prescriptive document type definition that eliminates those features. --><![ %HTML.Recommended [ <!ENTITY % HTML.Deprecated "IGNORE">]]><!ENTITY % HTML.Deprecated "INCLUDE" -- Certain features of the language are necessary for compatibility with earlier versions of the specification, but they tend to be used and implemented inconsistently, and their use is deprecated. This feature test entity enables a document type definition that eliminates these features. --><!ENTITY % HTML.Highlighting "INCLUDE" -- Use this feature test entity to validate that a document uses no highlighting tags, which may be ignored on minimal implementations. --><!ENTITY % HTML.Forms "INCLUDE" -- Use this feature test entity to validate that a document contains no forms, which may not be supported in minimal implementations --><!--============== Imported Names ==============================--><!ENTITY % Content-Type "CDATA" -- meaning an internet media type (aka MIME content type, as per RFC1521) --><!ENTITY % HTTP-Method "GET | POST" -- as per HTTP specification, in progress --><!--========= DTD "Macros" =====================--><!ENTITY % heading "H1|H2|H3|H4|H5|H6"><!ENTITY % list " UL | OL | DIR | MENU " ><!--======= Character mnemonic entities =================--><!ENTITY % ISOlat1 PUBLIC "ISO 8879-1986//ENTITIES Added Latin 1//EN//HTML">%ISOlat1;<!ENTITY amp CDATA "&" -- ampersand --><!ENTITY gt CDATA ">" -- greater than --><!ENTITY lt CDATA "<" -- less than --><!ENTITY quot CDATA """ -- double quote --><!--========= SGML Document Access (SDA) Parameter Entities =====--><!-- HTML 2.0 contains SGML Document Access (SDA) fixed attributesin support of easy transformation to the International Committeefor Accessible Document Design (ICADD) DTD "-//EC-USA-CDA/ICADD//DTD ICADD22//EN".ICADD applications are designed to support usable access tostructured information by print-impaired individuals throughBraille, large print and voice synthesis. For more information onSDA & ICADD: - ISO 12083:1993, Annex A.8, Facilities for Braille, large print and computer voice - ICADD ListServ <ICADD%ASUACAD.BITNET@ARIZVM1.ccit.arizona.edu> - Usenet news group bit.listserv.easi - Recording for the Blind, +1 800 221 4792--><!ENTITY % SDAFORM "SDAFORM CDATA #FIXED" -- one to one mapping --><!ENTITY % SDARULE "SDARULE CDATA #FIXED" -- context-sensitive mapping --><!ENTITY % SDAPREF "SDAPREF CDATA #FIXED" -- generated text prefix --><!ENTITY % SDASUFF "SDASUFF CDATA #FIXED" -- generated text suffix --><!ENTITY % SDASUSP "SDASUSP NAME #FIXED" -- suspend transform process --><!--========== Text Markup =====================--><![ %HTML.Highlighting [<!ENTITY % font " TT | B | I "><!ENTITY % phrase "EM | STRONG | CODE | SAMP | KBD | VAR | CITE "><!ENTITY % text "#PCDATA | A | IMG | BR | %phrase | %font"><!ELEMENT (%font;|%phrase) - - (%text)*><!ATTLIST ( TT | CODE | SAMP | KBD | VAR ) %SDAFORM; "Lit" ><!ATTLIST ( B | STRONG ) %SDAFORM; "B" ><!ATTLIST ( I | EM | CITE ) %SDAFORM; "It" ><!-- <TT> Typewriter text --><!-- <B> Bold text --><!-- <I> Italic text --><!-- <EM> Emphasized phrase --><!-- <STRONG> Strong emphasis --><!-- <CODE> Source code phrase --><!-- <SAMP> Sample text or characters --><!-- <KBD> Keyboard phrase, e.g. user input --><!-- <VAR> Variable phrase or substitutable --><!-- <CITE> Name or title of cited work --><!ENTITY % pre.content "#PCDATA | A | HR | BR | %font | %phrase">]]><!ENTITY % text "#PCDATA | A | IMG | BR"><!ELEMENT BR - O EMPTY><!ATTLIST BR %SDAPREF; "&#RE;" ><!-- <BR> Line break --><!--========= Link Markup ======================--><!ENTITY % linkType "NAMES"><!ENTITY % linkExtraAttributes "REL %linkType #IMPLIED REV %linkType #IMPLIED URN CDATA #IMPLIED TITLE CDATA #IMPLIED METHODS NAMES #IMPLIED "><![ %HTML.Recommended [ <!ENTITY % A.content "(%text)*" -- <H1><a name="xxx">Heading</a></H1> is preferred to <a name="xxx"><H1>Heading</H1></a> -->]]><!ENTITY % A.content "(%heading|%text)*"><!ELEMENT A - - %A.content -(A)><!ATTLIST A HREF CDATA #IMPLIED NAME CDATA #IMPLIED %linkExtraAttributes; %SDAPREF; "<Anchor: #AttList>" ><!-- <A> Anchor; source/destination of link --><!-- <A NAME="..."> Name of this anchor --><!-- <A HREF="..."> Address of link destination --><!-- <A URN="..."> Permanent address of destination --><!-- <A REL=...> Relationship to destination --><!-- <A REV=...> Relationship of destination to this --><!-- <A TITLE="..."> Title of destination (advisory) --><!-- <A METHODS="..."> Operations on destination (advisory) --><!--========== Images ==========================--><!ELEMENT IMG - O EMPTY><!ATTLIST IMG SRC CDATA #REQUIRED ALT CDATA #IMPLIED ALIGN (top|middle|bottom) #IMPLIED ISMAP (ISMAP) #IMPLIED %SDAPREF; "<Fig><?SDATrans Img: #AttList>#AttVal(Alt)</Fig>" ><!-- <IMG> Image; icon, glyph or illustration --><!-- <IMG SRC="..."> Address of image object --><!-- <IMG ALT="..."> Textual alternative --><!-- <IMG ALIGN=...> Position relative to text --><!-- <IMG ISMAP> Each pixel can be a link --><!--========== Paragraphs=======================--><!ELEMENT P - O (%text)*><!ATTLIST P %SDAFORM; "Para" ><!-- <P> Paragraph --><!--========== Headings, Titles, Sections ===============--><!ELEMENT HR - O EMPTY><!ATTLIST HR %SDAPREF; "&#RE;&#RE;" ><!-- <HR> Horizontal rule --><!ELEMENT ( %heading ) - - (%text;)*><!ATTLIST H1 %SDAFORM; "H1" ><!ATTLIST H2 %SDAFORM; "H2" ><!ATTLIST H3 %SDAFORM; "H3" ><!ATTLIST H4 %SDAFORM; "H4" ><!ATTLIST H5 %SDAFORM; "H5" ><!ATTLIST H6 %SDAFORM; "H6" ><!-- <H1> Heading, level 1 --><!-- <H2> Heading, level 2 --><!-- <H3> Heading, level 3 --><!-- <H4> Heading, level 4 --><!-- <H5> Heading, level 5 --><!-- <H6> Heading, level 6 --><!--========== Text Flows ======================--><![ %HTML.Forms [ <!ENTITY % block.forms "BLOCKQUOTE | FORM | ISINDEX">]]><!ENTITY % block.forms "BLOCKQUOTE"><![ %HTML.Deprecated [ <!ENTITY % preformatted "PRE | XMP | LISTING">]]><!ENTITY % preformatted "PRE"><!ENTITY % block "P | %list | DL | %preformatted | %block.forms"><!ENTITY % flow "(%text|%block)*"><!ENTITY % pre.content "#PCDATA | A | HR | BR"><!ELEMENT PRE - - (%pre.content)*><!ATTLIST PRE WIDTH NUMBER #implied %SDAFORM; "Lit" ><!-- <PRE> Preformatted text --><!-- <PRE WIDTH=...> Maximum characters per line -->⌨️ 快捷键说明
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