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<!-- html.dtd |
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Document Type Definition for the HyperText Markup Language (HTML DTD) |
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$Id: html.dtd,v 1.19 1994/09/23 22:46:51 connolly Exp $ |
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Author: Daniel W. Connolly <[email protected]> |
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See Also: html.decl, html-0.dtd, html-1.dtd |
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http://www.hal.com/%7Econnolly/html-spec/index.html |
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http://info.cern.ch/hypertext/WWW/MarkUp2/MarkUp.html |
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--> |
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|
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<!ENTITY % HTML.Version |
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"-//IETF//DTD HTML//EN//2.0" |
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|
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-- Typical usage: |
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|
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> |
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<html> |
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... |
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</html> |
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-- |
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> |
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|
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<!--================== Feature Test Entities ==============================--> |
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|
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<!ENTITY % HTML.Recommended "IGNORE" |
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-- Certain features of the language are necessary for compatibility |
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with widespread usage, but they may compromise the structural |
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integrity of a document. This feature test entity enables |
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a more prescriptive document type definition that eliminates |
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the above features. |
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--> |
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<![ %HTML.Recommended [ |
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<!ENTITY % HTML.Deprecated "IGNORE"> |
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]]> |
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<!ENTITY % HTML.Deprecated "INCLUDE" |
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-- Certain features of the language are necessary for compatibility |
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with earlier versions of the specification, but they tend |
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to be used an implemented inconsistently, and their use is |
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deprecated. This feature test entity enables a document type |
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definition that eliminates these features. |
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--> |
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|
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<!ENTITY % HTML.Highlighting "INCLUDE"> |
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<!ENTITY % HTML.Forms "INCLUDE"> |
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|
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<!--================== Imported Names =====================================--> |
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|
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<!ENTITY % Content-Type "CDATA" |
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-- meaning a MIME content type, as per RFC1521 |
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--> |
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<!ENTITY % HTTP-Method "GET | POST" |
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-- as per HTTP specification |
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--> |
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<!ENTITY % URI "CDATA" |
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-- The term URI means a CDATA attribute |
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whose value is a Uniform Resource Identifier, |
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as defined by |
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"Universal Resource Identifiers" by Tim Berners-Lee |
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aka http://info.cern.ch/hypertext/WWW/Addressing/URL/URI_Overview.html |
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aka RFC 1630 |
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|
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Note that CDATA attributes are limited by the LITLEN |
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capacity (1024 in the current version of html.decl), |
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so that URIs in HTML have a bounded length. |
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|
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--> |
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|
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<!-- DTD "macros" --> |
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<!ENTITY % heading "H1|H2|H3|H4|H5|H6"> |
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<!ENTITY % list " UL | OL | DIR | MENU " > |
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<!--================ Character mnemonic entities ==========================--> |
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<!ENTITY % ISOlat1 PUBLIC |
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"-//IETF//ENTITIES Added Latin 1 for HTML//EN"> |
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%ISOlat1; |
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|
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<!ENTITY amp CDATA "&" -- ampersand --> |
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<!ENTITY gt CDATA ">" -- greater than --> |
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<!ENTITY lt CDATA "<" -- less than --> |
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<!ENTITY quot CDATA """ -- double quote --> |
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<!--=================== Text Markup =======================================--> |
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<![ %HTML.Highlighting [ |
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<!ENTITY % font " TT | B | I "> |
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<!ENTITY % phrase "EM | STRONG | CODE | SAMP | KBD | VAR | CITE "> |
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<!ENTITY % text "#PCDATA | A | IMG | BR | %phrase | %font"> |
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<!ENTITY % pre.content "#PCDATA | A | HR | BR | %font | %phrase"> |
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<!ELEMENT (%font;|%phrase) - - (%text)+> |
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|
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]]> |
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<!ENTITY % text "#PCDATA | A | IMG | BR"> |
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<!ELEMENT BR - O EMPTY> |
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<!--================== Link Markup ========================================--> |
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<![ %HTML.Recommended [ |
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<!ENTITY % linkName "ID"> |
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]]> |
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<!ENTITY % linkName "CDATA"> |
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<!ENTITY % linkType "NAME" |
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-- a list of these will be specified at a later date --> |
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<!ENTITY % linkExtraAttributes |
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"REL %linkType #IMPLIED -- forward relationship type -- |
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REV %linkType #IMPLIED -- reversed relationship type |
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to referent data -- |
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URN CDATA #IMPLIED -- universal resource number -- |
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|
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TITLE CDATA #IMPLIED -- advisory only -- |
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METHODS NAMES #IMPLIED -- supported public methods of the object: |
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TEXTSEARCH, GET, HEAD, ... -- |
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"> |
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<![ %HTML.Recommended [ |
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<!ENTITY % A.content "(%text)+" |
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-- <H1><a name="xxx">Heading</a></H1> |
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is preferred to |
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<a name="xxx"><H1>Heading</H1></a> |
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--> |
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]]> |
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<!ENTITY % A.content "(%heading|%text)+"> |
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<!ELEMENT A - - %A.content -(A)> |
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<!ATTLIST A |
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HREF %URI #IMPLIED |
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NAME %linkName #IMPLIED |
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%linkExtraAttributes; |
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> |
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|
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<!--=================== Images ============================================--> |
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<!ENTITY % img.alt.default "#IMPLIED" |
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-- ALT attribute required in Level 0 docs --> |
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<!ELEMENT IMG - O EMPTY -- Embedded image --> |
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<!ATTLIST IMG |
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SRC %URI; #REQUIRED -- URI of document to embed -- |
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ALT CDATA %img.alt.default; |
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ALIGN (top|middle|bottom) #IMPLIED |
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ISMAP (ISMAP) #IMPLIED |
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> |
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<!--=================== Paragraphs=========================================--> |
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<!ELEMENT P - O (%text)+> |
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<!--=================== Headings, Titles, Sections ========================--> |
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<!ELEMENT HR - O EMPTY -- horizontal rule --> |
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<!ELEMENT ( %heading ) - - (%text;)+> |
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<!ELEMENT TITLE - - (#PCDATA) |
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-- The TITLE element is not considered part of the flow of text. |
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It should be displayed, for example as the page header or |
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window title. |
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--> |
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<!--=================== Text Flows ========================================--> |
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<![ %HTML.Forms [ |
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<!ENTITY % block.forms "| FORM | ISINDEX"> |
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]]> |
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<!ENTITY % block.forms ""> |
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<![ %HTML.Deprecated [ |
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<!ENTITY % preformatted "PRE | XMP | LISTING"> |
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]]> |
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<!ENTITY % preformatted "PRE"> |
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<!ENTITY % block "P | %list | DL |
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| %preformatted |
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| BLOCKQUOTE %block.forms"> |
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<!ENTITY % flow "(%text|%block)*"> |
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<!ENTITY % pre.content "#PCDATA | A | HR | BR"> |
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<!ELEMENT PRE - - (%pre.content)+> |
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<!ATTLIST PRE |
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WIDTH NUMBER #implied |
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> |
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<![ %HTML.Deprecated [ |
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<!ENTITY % literal "CDATA" |
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-- special non-conforming parsing mode where |
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the only markup signal is the end tag |
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in full |
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--> |
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<!ELEMENT XMP - - %literal> |
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<!ELEMENT LISTING - - %literal> |
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<!ELEMENT PLAINTEXT - O %literal> |
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]]> |
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<!--=================== Lists =============================================--> |
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<!ELEMENT DL - - (DT*, DD?)+> |
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<!ATTLIST DL |
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COMPACT (COMPACT) #IMPLIED> |
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|
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<!ELEMENT DT - O (%text)+> |
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<!ELEMENT DD - O %flow> |
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<!ELEMENT (OL|UL) - - (LI)+> |
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<!ELEMENT (DIR|MENU) - - (LI)+ -(%block)> |
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<!ATTLIST (%list) |
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COMPACT (COMPACT) #IMPLIED> |
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|
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<!ELEMENT LI - O %flow> |
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|
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<!--=================== Document Body =====================================--> |
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<![ %HTML.Recommended [ |
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<!ENTITY % body.content "(%heading|%block|HR|ADDRESS)*" |
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-- <h1>Heading</h1> |
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<p>Text ... |
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is preferred to |
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<h1>Heading</h1> |
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Text ... |
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--> |
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]]> |
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<!ENTITY % body.content "(%heading | %text | %block | HR | ADDRESS)*"> |
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<!ELEMENT BODY O O %body.content> |
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<!ELEMENT BLOCKQUOTE - - %body.content> |
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<![ %HTML.Recommended [ |
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<!ENTITY % address.content "(%text)*"> |
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]]> |
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<!ENTITY % address.content "(%text|P)*"> |
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<!ELEMENT ADDRESS - - %address.content> |
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<!--================ Forms ===============================================--> |
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<![ %HTML.Forms [ |
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<!ELEMENT FORM - - %body.content -(FORM) +(INPUT|SELECT|TEXTAREA)> |
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<!ATTLIST FORM |
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ACTION %URI #REQUIRED |
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METHOD (%HTTP-Method) GET |
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ENCTYPE %Content-Type; "application/x-www-form-urlencoded" |
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> |
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|
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<!ENTITY % InputType "(TEXT | PASSWORD | CHECKBOX | |
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RADIO | SUBMIT | RESET | |
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IMAGE | HIDDEN )"> |
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<!ELEMENT INPUT - O EMPTY> |
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<!ATTLIST INPUT |
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TYPE %InputType TEXT |
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NAME CDATA #IMPLIED -- required for all but submit and reset -- |
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VALUE CDATA #IMPLIED |
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SRC %URI #IMPLIED -- for image inputs -- |
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CHECKED (CHECKED) #IMPLIED |
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SIZE CDATA #IMPLIED -- like NUMBERS, |
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but delimited with comma, not space -- |
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MAXLENGTH NUMBER #IMPLIED |
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ALIGN (top|middle|bottom) #IMPLIED |
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> |
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|
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<!ELEMENT SELECT - - (OPTION+)> |
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<!ATTLIST SELECT |
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NAME CDATA #REQUIRED |
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SIZE NUMBER #IMPLIED |
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MULTIPLE (MULTIPLE) #IMPLIED |
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> |
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|
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<!ELEMENT OPTION - O (#PCDATA)> |
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<!ATTLIST OPTION |
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SELECTED (SELECTED) #IMPLIED |
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VALUE CDATA #IMPLIED |
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> |
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|
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<!ELEMENT TEXTAREA - - (#PCDATA)> |
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<!ATTLIST TEXTAREA |
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NAME CDATA #REQUIRED |
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ROWS NUMBER #REQUIRED |
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COLS NUMBER #REQUIRED |
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> |
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|
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]]> |
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|
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|
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<!--================ Document Head ========================================--> |
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<!ENTITY % head.link "& LINK*"> |
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<![ %HTML.Recommended [ |
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<!ENTITY % head.nextid ""> |
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]]> |
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<!ENTITY % head.nextid "& NEXTID?"> |
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|
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<!ENTITY % head.content "TITLE & ISINDEX? & BASE? & META* |
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%head.nextid |
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%head.link"> |
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|
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<!ELEMENT HEAD O O (%head.content)> |
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|
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<!ELEMENT LINK - O EMPTY> |
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<!ATTLIST LINK |
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HREF %URI #REQUIRED |
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%linkExtraAttributes; > |
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|
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<!ELEMENT ISINDEX - O EMPTY> |
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|
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<!ELEMENT BASE - O EMPTY> |
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<!ATTLIST BASE |
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HREF %URI; #REQUIRED |
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> |
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|
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<!ELEMENT NEXTID - O EMPTY> |
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<!ATTLIST NEXTID N %linkName #REQUIRED> |
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|
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<!ELEMENT META - O EMPTY -- Generic Metainformation --> |
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<!ATTLIST META |
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HTTP-EQUIV NAME #IMPLIED -- HTTP response header name -- |
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NAME NAME #IMPLIED -- metainformation name -- |
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CONTENT CDATA #REQUIRED -- associated information -- |
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> |
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|
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|
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<!--================ Document Structure ===================================--> |
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|
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<![ %HTML.Deprecated [ |
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<!ENTITY % html.content "HEAD, BODY, PLAINTEXT?"> |
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]]> |
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<!ENTITY % html.content "HEAD, BODY"> |
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|
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<!ELEMENT HTML O O (%html.content)> |
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<!ENTITY % version.attr "VERSION CDATA #FIXED "%HTML.Version;""> |
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|
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<!ATTLIST HTML |
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%version.attr;-- report DTD version to application -- |
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> |
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