HTML DTD enclosed
Dan Connolly (
connolly@pixel.convex.com)
Wed, 15 Jul 92 22:35:19 CDT
Message-Id: <9207160335.AA24812@pixel.convex.com>
To: www-talk@nxoc01.cern.ch
Subject: HTML DTD enclosed
Date: Wed, 15 Jul 92 22:35:19 CDT
From: Dan Connolly <connolly@pixel.convex.com>
<!-- html.dtd - document type declaration subset for
HyperText Markup Language as defined
by the World Wide Web project.
15 Jul 92 by connolly@convex.com
See also: http://info.cern.ch/hypertext/WWW/MarkUp/Tags.html
-->
<!-- Terminal symbols -->
<!ENTITY lt "<">
<!ENTITY gt ">">
<!ENTITY amp "&">
<!-- some existing html uses these. I think they meant
&
in stead of
&.
-->
<!ENTITY lt. "<">
<!ENTITY gt. ">">
<!ENTITY amp. "&">
<!-- Non-ELEMENT symbols -->
<!ENTITY % heading "H1|H2|H3|H4|H5|H6" >
<!ENTITY % list "UL|OL|DIR|MENU|DL">
<!ENTITY % text "P|#PCDATA">
<!ENTITY % raw "XMP|LISTING">
<!-- PlainText is more than 8 characters, and changing the
NAMELEN capacity involves including a lengthy SGML declaration
in every HTML file. Besides: the semantics of PlainText can't
be captured by real SGML anyway. -->
<!ENTITY % body "%heading|%list|%text|%raw">
<!-- Document structure -->
<!ELEMENT HTML O O ((TITLE? & NEXTID? & ISINDEX?), BODY, ADDRESS?)>
<!ELEMENT TITLE - - (#PCDATA)>
<!ELEMENT NEXTID - O EMPTY >
<!ATTLIST NEXTID N NUMBER #REQUIRED>
<!-- as noted in Tags.html, the conventional <NEXTID 10> is
illegal. Use <NEXTID N=10> to comply with this DTD. -->
<!ELEMENT ISINDEX - O EMPTY >
<!ELEMENT BODY O O ((%heading), (%body)+) +(A)>
<!-- The BODY element is necessary to avoid mixed content
in the HTML element. Mixed content and optional elements
don't mix very well. -->
<!ELEMENT (%heading) - - (%text)+
--Tags.html says titles should fit on one line, but
the browser handles paragraph breaks inside headings
gracefully. -->
<!ELEMENT (MENU|UL|OL|DIR) - - (LI+)>
<!ELEMENT DL - - ((DT, DD)+)>
<!ELEMENT LI - O (%text)+>
<!ELEMENT DT - O (#PCDATA)+>
<!ELEMENT DD - O (%text)+>
<!ELEMENT ADDRESS - O (%text)+ +(A)>
<!-- Tags.html says "This tag is for address information, signatures,
etc, normally at the top or bottom of a document." Here, it is only
allowed at the end of a document. -->
<!ELEMENT (%raw) - - CDATA>
<!-- BUG:
tags.html says that you can put anything but </XMP> in the
text of an XMP element. SGML says that ETAGO, "</" ends a CDATA
section.
-->
<!ELEMENT P - O EMPTY -- paragraph SEPARATOR -->
<!-- We could use this to let blank lines separate paragraphs
<!ENTITY ptag STARTTAG "p">
<!SHORTREF bodymap "&#RS;&#RE;" ptag>
<!USEMAP bodymap BODY;>
-->
<!ELEMENT A - - (%body)+>
<!ATTLIST A
HREF CDATA #IMPLIED -- attribute values with colons etc. must
be quoted. --
NAME CDATA #IMPLIED
TYPE CDATA #IMPLIED >