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- <!-- 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.
-