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Document Type Definition for the HyperText Markup Language |
Document Type Definition for the HyperText Markup Language |
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as used by the World Wide Web application (HTML DTD). |
as used by the World Wide Web application (HTML DTD). |
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$Id$ |
$Id$ |
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--> |
--> |
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<!-- Feature Test Entities --> |
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<!-- To use these, write your document like: |
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<!DOCTYPE HTML [ |
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<!ENTITY % HTML.Optional "INCLUDE"> |
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<!ENTITY % html PUBLIC "-//connolly hal.com//DTD WWW HTML 1.8//EN"> |
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%html; |
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]> |
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<TITLE>Here's my doc</TITLE> |
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<p>It uses lots of optional features |
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In practice, if you're using sgmls to validate your docs, |
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you can stick the <!DOCTYPE [...]> in a separate file and |
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validate with: |
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sgmls -s doctype.sgml foo.html |
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--> |
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<!ENTITY % HTML.Minimal "IGNORE"> |
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<!ENTITY % HTML.Obsolete "IGNORE"> |
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<!ENTITY % HTML.Prescriptive "IGNORE"> |
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<![ %HTML.Minimal [ |
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<!ENTITY % HTML.linkRelationships "IGNORE"> |
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<!ENTITY % HTML.linkMethods "IGNORE"> |
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<!ENTITY % HTML.linkRedundantInfo "IGNORE"> |
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<!ENTITY % HTML.forms "IGNORE"> |
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<!-- @@ nested lists --> |
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<!-- @@ phrases --> |
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<!-- @@ headers inside A --> |
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<!-- @@ nested phrases, fonts --> |
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]]> |
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<![ %HTML.Obsolete [ |
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<!ENTITY % HTML.titleCDATA "INCLUDE"> |
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<!ENTITY % HTML.litCDATA "INCLUDE"> |
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<!ENTITY % HTML.pSeparator "INCLUDE"> |
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]]> |
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<![ %HTML.Prescriptive [ |
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<!-- |
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This feature test entity prescribes that certain |
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idioms detract from the structural integrity of an |
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HTML document, and are therefore disallowed. |
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--> |
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<!ENTITY % HTML.font-phrase "IGNORE"> |
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<!ENTITY % HTML.anchorNameCDATA "IGNORE"> |
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<!ENTITY % HTML.PLAINTEXT "IGNORE"> |
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<!ENTITY % HTML.bodyBlockOnly "INCLUDE"> |
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]]> |
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<!ENTITY HTML.Version |
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"-//connolly hal.com//DTD WWW HTML $Date 1994/04/19 17:24:06 $//EN" |
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-- public identifier for "default" version -- |
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-- actually, take the $'s out to get the real public identifer, -- |
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-- since $ is illegal in public identifier. When DTD stabilizes, -- |
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-- we'll need to stop using RCS keywords to version the pub id -- |
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> |
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<!ENTITY % HTML.bodyBlockOnly "IGNORE" |
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-- only allow block elements in the BODY element |
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This means all paragraphs need to start with a <P> tag. |
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--> |
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<!ENTITY % HTML.pSeparator "IGNORE" |
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-- use P element as paragraph separator, rather that container. |
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--> |
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<!ENTITY % HTML.linkRelationships "INCLUDE" |
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-- Adding markup to links to show the relationship between |
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ends of a link |
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see http://info.cern.ch/hypertext/WWW/MarkUp/Relationships.html |
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--> |
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<!ENTITY % HTML.linkMethods "INCLUDE" |
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-- Adding markup to links to show the methods supported |
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by the referent object |
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see http://info.cern.ch/hypertext/WWW/MarkUp/Elements/A.html |
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--> |
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<!ENTITY % HTML.linkRedundantInfo "INCLUDE" |
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-- Adding markup to links to give redundant information |
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like URN, content type, title... |
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--> |
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<!ENTITY % HTML.anchorNameCDATA "INCLUDE" |
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-- Anchor names should be distinct. SGML parser can validate |
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this if the NAME attribute of the A element is declared as ID. |
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But that restricts the syntax of an anchor name to an SGML name, |
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i.e. a letter followed by letters, numbers, periods and dashes, |
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up to NAMELEN (34) characters long. |
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--> |
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<!ENTITY % HTML.PLAINTEXT "INCLUDE" |
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-- Support for the <PLAINTEXT> tag as a sign of the |
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end of th HTML data stream and the beginning of a stream |
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of text/plain data |
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--> |
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<!ENTITY % HTML.titleCDATA "IGNORE" |
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-- Is the TITLE element #PCDATA, RCDATA, or CDATA content? |
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On Mosaic, it's #PCDATA, but in the linemode browser, |
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it's more like CDATA, but not quite. |
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--> |
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<!ENTITY % HTML.NEXTID "INCLUDE" |
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-- Used by the NeXT implementation to keep track of the |
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next anchor id to use |
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--> |
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<!ENTITY % HTML.font-phrase "INCLUDE" |
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-- allow B, I, TT, U outside PRE, |
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CITE, VAR, etc. inside PRE |
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--> |
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<!ENTITY % HTML.KEY "IGNORE" |
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-- There was once a KEY element, for keyboard keys, menu items, |
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buttons, etc. but it's not supported or widely documented |
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--> |
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<!ENTITY % HTML.U "IGNORE" |
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-- There was also a U element, but since it clashes with |
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the common pracitce of underlining hypertext links, it is |
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not widely supported |
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--> |
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<!ENTITY % HTML.litCDATA "IGNORE" |
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-- treat XMP, LISTING as CDATA, as per linemodeWWW |
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--> |
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<!ENTITY % HTML.forms "INCLUDE" |
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-- Support for forms as per |
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http://www.ncsa.uiuc.edu/SDG/Software/Mosaic/Docs/fill-out-forms/overview.html |
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--> |
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<!-- DTD definitions --> |
<!-- DTD definitions --> |
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<!ENTITY % list " UL | OL | DIR | MENU "> |
<!ENTITY % list " UL | OL | DIR | MENU "> |
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<!ENTITY % literal " XMP | LISTING "> |
<!ENTITY % literal " XMP | LISTING "> |
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<!ENTITY % bodyelement |
<!ENTITY % URI "CDATA" |
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"P | HR | %heading | |
-- The term URI means a CDATA attribute |
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%list | DL | ADDRESS | PRE | BLOCKQUOTE |
whose value is a Uniform Resource Identifier, |
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| %literal"> |
as defined by |
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"Universal Resource Identifiers" by Tim Berners-Lee |
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<!ENTITY % URL "CDATA" |
aka http://info.cern.ch/hypertext/WWW/Addressing/URL/URI_Overview.html |
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-- The term URL means a CDATA attribute |
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whose value is a Uniform Resource Locator, |
Note that CDATA attributes are limited by the LITLEN |
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as defined. (A URN may also be usable here when defined.) |
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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@@ Need to discuss relative addresses. |
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--> |
--> |
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<!ENTITY % linkattributes |
<!ENTITY % Content-Type "CDATA" |
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"NAME NMTOKEN #IMPLIED |
-- meaning a MIME content type, as per RFC1521 |
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HREF %URL; #IMPLIED |
--> |
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<![ %HTML.anchorNameCDATA [ <!ENTITY % anchor-name "CDATA"> ]]> |
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<!ENTITY % anchor-name "ID"> |
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<![ %HTML.linkRelationships [ <!ENTITY % linkRelAttrs " |
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REL CDATA #IMPLIED -- forward relationship type -- |
REL CDATA #IMPLIED -- forward relationship type -- |
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REV CDATA #IMPLIED -- reversed relationship type |
REV CDATA #IMPLIED -- reversed relationship type |
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to referent data: |
to referent data: |
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PARENT CHILD, SIBLING, NEXT, TOP, |
PARENT CHILD, SIBLING, NEXT, TOP, |
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DEFINITION, UPDATE, ORIGINAL etc. -- |
DEFINITION, UPDATE, ORIGINAL etc. -- |
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"> ]]> |
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<!ENTITY % linkRelAttrs ""> |
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<![ %HTML.linkRedundantInfo [ <!ENTITY % linkRedundantAttrs " |
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URN CDATA #IMPLIED -- universal resource number -- |
URN CDATA #IMPLIED -- universal resource number -- |
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TITLE CDATA #IMPLIED -- advisory only -- |
TITLE CDATA #IMPLIED -- advisory only -- |
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"> ]]> |
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<!ENTITY % linkRedundantAttrs ""> |
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<![ %HTML.linkMethods [ <!ENTITY % linkMethodAttrs " |
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METHODS NAMES #IMPLIED -- supported public methods of the object: |
METHODS NAMES #IMPLIED -- supported public methods of the object: |
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TEXTSEARCH, GET, HEAD, ... -- |
TEXTSEARCH, GET, HEAD, ... -- |
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"> ]]> |
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<!ENTITY % linkMethodAttrs ""> |
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<!ENTITY % linkattributes |
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"NAME %anchor-name #IMPLIED |
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HREF %URI; #IMPLIED |
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%linkRelAttrs; |
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%linkRedundantAttrs; |
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%linkMethodAttrs; |
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"> |
"> |
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<!-- Document Element --> |
<!-- Document Element --> |
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<!ELEMENT HTML O O (HEAD, BODY)> |
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<!ELEMENT HEAD O O ( TITLE? & ISINDEX? & NEXTID? & LINK* |
<![ %HTML.PLAINTEXT [ <!ENTITY % obsolete-plaintext ", PLAINTEXT?"> ]]> |
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& BASE?)> |
<!ENTITY % obsolete-plaintext ""> |
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<!ENTITY % html-content "HEAD, BODY %obsolete-plaintext;"> |
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<!ELEMENT HTML O O (%html-content)> |
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<!ELEMENT TITLE - - (#PCDATA) |
<![ %HTML.NEXTID [ <!ENTITY % head-content "TITLE? & ISINDEX? & LINK* & BASE? |
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& NEXTID?"> ]]> |
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<!ENTITY % head-content "TITLE & ISINDEX? & LINK* & BASE?"> |
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<!ELEMENT HEAD O O (%head-content)> |
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<![ %HTML.titleCDATA [ <!ENTITY % title-content "CDATA"> ]]> |
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<!ENTITY % title-content "(#PCDATA)"> |
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<!ELEMENT TITLE - - %title-content |
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-- The TITLE element is not considered part of the flow of text. |
-- 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 |
It should be displayed, for example as the page header or |
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window title. |
window title. |
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documents containing ISINDEX. |
documents containing ISINDEX. |
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--> |
--> |
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<!ELEMENT NEXTID - O EMPTY> |
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<!ATTLIST NEXTID N %anchor-name #REQUIRED |
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-- The number should be a name suitable for use |
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for the ID of a new element. When used, the value |
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has its numeric part incremented. EG Z67 becomes Z68 |
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--> |
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<!ELEMENT LINK - O EMPTY> |
<!ELEMENT LINK - O EMPTY> |
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<!ATTLIST LINK |
<!ATTLIST LINK |
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%linkattributes> |
%linkattributes> |
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<!ELEMENT BASE - O EMPTY -- Reference context for URLS --> |
<!ELEMENT BASE - O EMPTY -- Reference context for URIs --> |
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<!ATTLIST BASE |
<!ATTLIST BASE |
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HREF %URL; #IMPLIED |
HREF %URI; #REQUIRED |
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> |
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<!ENTITY % inline "EM | STRONG | |
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CODE | SAMP | KBD | KEY | VAR | DFN | CITE " |
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<!ELEMENT (%inline;) - - (#PCDATA | A)+> |
<![ %HTML.KEY [ |
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<!ENTITY % key-emph "| KEY"> |
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]]> |
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<!ENTITY % key-emph ""> |
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<![ %HTML.U [ |
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<!ENTITY % u-font "| U"> |
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]]> |
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<!ENTITY % u-font ""> |
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<!ENTITY % font "TT | B | I %u-font"> |
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<!ENTITY % phrase "EM | STRONG | CODE | SAMP | KBD | VAR | DFN | CITE |
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| STRIKE %key-emph"> |
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<![ %HTML.font-phrase [ |
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<!ENTITY % obsolete-font "| %font"> |
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<!ENTITY % obsolete-phrase "| %phrase"> |
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]]> |
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<!ENTITY % obsolete-font ""> |
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<!ENTITY % obsolete-phrase ""> |
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<![ %HTML.pSeparator [ |
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<!ENTITY % obsolete-p "| P"> |
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]]> |
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<!ENTITY % obsolete-p ""> |
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<!ENTITY % inline "%phrase %obsolete-font"> |
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<!ENTITY % pre-inline "%font %obsolete-phrase %obsolete-p"> |
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<!ENTITY % text "#PCDATA | IMG | %inline; | BR"> |
<!ENTITY % text "#PCDATA | IMG | %inline | BR %obsolete-p"> |
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<!ENTITY % htext "A | %text" -- Plus links, no structure --> |
<!ENTITY % htext "A | %text" -- Plus links, no structure --> |
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<!ENTITY % stext -- as htext but also nested structure -- |
<![ %HTML.font-phrase [ <!ENTITY % font-content "(%htext)+"> ]]> |
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"P | HR | %list | DL | ADDRESS |
<!ENTITY % font-content "#PCDATA"> |
282 |
| PRE | BLOCKQUOTE |
<!ELEMENT (%font;) - - (%font-content;)> |
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| %literal | %htext"> |
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<!ENTITY % block -- as htext but also nested structure -- |
<!ELEMENT (%phrase;) - - (%htext)+> |
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"P | HR | %list | DL |
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| PRE | BLOCKQUOTE |
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| %literal"> |
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<!ENTITY % pre "PRE | XMP | LISTING"> |
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<!ELEMENT BODY O O (%heading | %block)+> |
<![ %HTML.forms [ <!ENTITY % block-form "| FORM | ISINDEX"> ]]> |
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<!ENTITY % block-form ""> |
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<![ %HTML.pSeparator [ |
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<!ENTITY % obsolete-htext "| %htext"> |
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<!ENTITY % block-p ""> |
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]]> |
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<!ENTITY % obsolete-htext "| A"> |
296 |
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<!ENTITY % block-p "| P "> |
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<!ELEMENT A - - ANY> |
<!ENTITY % block "HR | %list | DL |
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| %pre | BLOCKQUOTE | ADDRESS |
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%block-form %block-p"> |
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<![ %HTML.bodyBlockOnly [ |
304 |
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<!ENTITY % current-htext ""> |
305 |
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]]> |
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<!ENTITY % current-htext "| %htext"> |
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<!ENTITY % body-content "%heading | %block %current-htext"> |
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<!ELEMENT BODY O O (%body-content)*> |
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<!ELEMENT A - - (%heading|%block|%text)+ -(A) |
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-- @# Technically, this allows silliness like: |
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<H2><A>xyz<H1>h1</H1></A></H2> |
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The right way to do anchors outside of %htext is more like: |
316 |
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<as id=z1><H2>lkjlkj</h2><ae start=z1> |
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--> |
318 |
<!ATTLIST A |
<!ATTLIST A |
319 |
%linkattributes; |
%linkattributes; |
320 |
> |
> |
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322 |
<!ELEMENT IMG - O EMPTY -- Embedded image --> |
<!ELEMENT IMG - O EMPTY -- Embedded image --> |
323 |
<!ATTLIST IMG |
<!ATTLIST IMG |
324 |
SRC %URL; #IMPLIED -- URL of document to embed -- |
SRC %URI; #IMPLIED -- URI of document to embed -- |
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ALT CDATA #IMPLIED |
326 |
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ALIGN (top|middle|bottom) #IMPLIED |
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ISMAP (ISMAP) #IMPLIED |
328 |
> |
> |
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<!ELEMENT P - O (%htext)+ -- paragraph --> |
<![ %HTML.pSeparator [ <!ENTITY % p-content "EMPTY"> ]]> |
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<!ELEMENT (HR|BR) - O EMPTY -- horizontal rule --> |
<!ENTITY % p-content "(%htext)+"> |
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<!ELEMENT P - O %p-content> |
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<!ELEMENT HR - O EMPTY -- horizontal rule --> |
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<!ELEMENT BR - O EMPTY -- @# BR -> &br; --> |
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337 |
<!ELEMENT ( %heading ) - - (%htext;)+> |
<!ELEMENT ( %heading ) - - (%htext;)+> |
338 |
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339 |
<!ELEMENT DL - - (DT+, DD)+> |
<!ELEMENT DL - - (DT*, DD?)+> |
340 |
<!-- structured DL's |
<!ATTLIST DL |
341 |
--> |
COMPACT (COMPACT) #IMPLIED> |
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343 |
<!ELEMENT DT - O (%htext)+> |
<!ELEMENT DT - O (%htext)+> |
344 |
<!ELEMENT DD - O (%htext|%block)+> |
<!ELEMENT DD - O (%htext|%block)+> |
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346 |
<!ELEMENT (%list) - - (LI)+> |
<!ELEMENT (%list) - - (LI)+> |
347 |
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<!ATTLIST (%list) |
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COMPACT NAME #IMPLIED -- COMPACT, etc.-- |
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> |
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348 |
<!ELEMENT LI - O (%htext|%block)+> |
<!ELEMENT LI - O (%htext|%block)+> |
349 |
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350 |
<!ELEMENT BLOCKQUOTE - - (P+, ADDRESS?)+ |
<!ELEMENT BLOCKQUOTE - - (%htext|%block)+ -- @# Hmm... -- |
351 |
-- for quoting some other source --> |
-- for quoting some other source --> |
352 |
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353 |
<!ELEMENT ADDRESS - - (%htext;)+> |
<!ELEMENT ADDRESS - - (%htext;|%block)+> |
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<!ELEMENT PRE - - (#PCDATA | TT | B | I | U | A | P | BR)+> |
<!ELEMENT PRE - - (#PCDATA|%pre-inline|A)+> |
356 |
<!ATTLIST PRE |
<!ATTLIST PRE |
357 |
WIDTH NUMBER #implied |
WIDTH NUMBER #implied |
358 |
> |
> |
363 |
"ISO 8879:1986//ENTITIES Added Latin 1//EN"> |
"ISO 8879:1986//ENTITIES Added Latin 1//EN"> |
364 |
%ISOlat1; |
%ISOlat1; |
365 |
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366 |
<!ENTITY amp "&" -- ampersand --> |
<!ENTITY #DEFAULT SDATA "&unkown;" --display the markup--> |
367 |
<!ENTITY gt ">" -- greater than --> |
<!ENTITY amp CDATA "&" -- ampersand --> |
368 |
<!ENTITY lt "<" -- less than --> |
<!ENTITY gt CDATA ">" -- greater than --> |
369 |
<!ENTITY nbsp " " -- @@should be NON_BREAKING space --> |
<!ENTITY lt CDATA "<" -- less than --> |
370 |
<!-- @@ should add entites for processing instructions |
<!ENTITY quot CDATA """ -- double quote --> |
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<!-- Processing Entities --> |
373 |
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<!ENTITY nbsp "<? nonbreaking-space>"> |
375 |
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<!-- @# should add entites for processing instructions |
376 |
for line break, centering, etc. --> |
for line break, centering, etc. --> |
377 |
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<!-- deprecated elements --> |
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379 |
<!ELEMENT (%literal) - - CDATA> |
<!-- Forms --> |
380 |
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<![ %HTML.forms [ |
381 |
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382 |
<!ELEMENT PLAINTEXT - O EMPTY> |
<!ENTITY % HTTP-Method "(GET | POST)"> |
383 |
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<!ELEMENT FORM - - (%body-content)* -(FORM) +(INPUT|SELECT|TEXTAREA)> |
384 |
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<!ATTLIST FORM |
385 |
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ACTION %URI #REQUIRED |
386 |
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METHOD %HTTP-Method #IMPLIED -- @# MAILTO? -- |
387 |
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ENCTYPE %Content-Type; #IMPLIED |
388 |
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> |
389 |
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390 |
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<!ENTITY % InputType "(TEXT | PASSWORD | CHECKBOX | |
391 |
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RADIO | SUBMIT | RESET | |
392 |
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IMAGE | HIDDEN )"> |
393 |
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<!ELEMENT INPUT - O EMPTY> |
394 |
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<!ATTLIST INPUT |
395 |
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TYPE %InputType #IMPLIED -- @# defaults to TEXT?? -- |
396 |
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NAME CDATA #IMPLIED -- required for all but submit and reset -- |
397 |
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VALUE CDATA #IMPLIED |
398 |
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SRC %URI #IMPLIED -- for image inputs -- |
399 |
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CHECKED (CHECKED) #IMPLIED |
400 |
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SIZE CDATA #IMPLIED -- @# should be NUMBERS: delimit with space, not comma -- |
401 |
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MAXLENGTH NUMBER #IMPLIED |
402 |
|
ALIGN (top|middle|bottom|left|center|right) #IMPLIED --@#supported?-- |
403 |
|
> |
404 |
|
|
405 |
|
<!ELEMENT SELECT - - (OPTION+)> |
406 |
|
<!ATTLIST SELECT |
407 |
|
NAME CDATA #REQUIRED |
408 |
|
SIZE NUMBER #IMPLIED |
409 |
|
MULTIPLE (MULTIPLE) #IMPLIED |
410 |
|
> |
411 |
|
|
412 |
|
<!ELEMENT OPTION - O (#PCDATA)> |
413 |
|
<!ATTLIST OPTION |
414 |
|
SELECTED (SELECTED) #IMPLIED |
415 |
|
VALUE CDATA #IMPLIED |
416 |
|
> |
417 |
|
|
418 |
|
<!ELEMENT TEXTAREA - - (#PCDATA)> |
419 |
|
<!ATTLIST TEXTAREA |
420 |
|
NAME CDATA #REQUIRED |
421 |
|
ROWS NUMBER #REQUIRED -- @#implied? -- |
422 |
|
COLS NUMBER #REQUIRED |
423 |
|
> |
424 |
|
]]> |
425 |
|
|
426 |
|
<!-- Obsolete Elements --> |
427 |
|
|
428 |
|
<![ %HTML.litCDATA [ <!ENTITY % lit-content "CDATA"> ]]> |
429 |
|
<!ENTITY % lit-content "RCDATA"> |
430 |
|
<!ELEMENT (%literal) - - %lit-content> |
431 |
|
|
432 |
|
<![ %HTML.PLAINTEXT [ |
433 |
|
<!ELEMENT PLAINTEXT - O EMPTY> |
434 |
|
]]> |