5. HTML Document Type Definitions
This is the SGML Declaration for HyperText Markup Language (HTML) as used by the World Wide Web (WWW) application:
<!SGML "ISO 8879:1986"
--
SGML Declaration for HyperText Markup Language (HTML).
--
CHARSET
BASESET "ISO 646:1983//CHARSET
International Reference Version (IRV)//ESC 2/5 4/0"
DESCSET 0 9 UNUSED
9 2 9
11 2 UNUSED
13 1 13
14 18 UNUSED
32 95 32
127 1 UNUSED
BASESET "ISO Registration Number 100//CHARSET
ECMA-94 Right Part of Latin Alphabet Nr. 1//ESC 2/13 4/1"
DESCSET 128 32 UNUSED
160 96 32
CAPACITY SGMLREF
TOTALCAP 150000
GRPCAP 150000
SCOPE DOCUMENT
SYNTAX
SHUNCHAR CONTROLS 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
19 20 21 22 23 24 25 26 27 28 29 30 31 127
BASESET "ISO 646:1983//CHARSET
International Reference Version (IRV)//ESC 2/5 4/0"
DESCSET 0 128 0
FUNCTION
-- SPACE 32
TAB SEPCHAR 9
LF SEPCHAR 10
FF SEPCHAR 12
CR SEPCHAR 13 --
-- The above is an accurate description of the usage of FUNCTION --
-- characters in HTML implementations; that is, there is no --
-- Record Start or Record End character, and no occurences of --
-- character 10 or 13 are "ignored" by the parser. --
-- But because few SGML implementations support this concrete --
-- sytax, we include the one below. --
-- Note that in order to get correct behaviour w.r.t. newline --
-- processing, you will have to play some tricks in construcing --
-- the document entity for parsing in order to keep the parser --
-- from ignoring newlines in surprising ways --
RE 13
RS 10
SPACE 32
TAB SEPCHAR 9
NAMING LCNMSTRT ""
UCNMSTRT ""
LCNMCHAR ".-"
UCNMCHAR ".-"
NAMECASE GENERAL YES
ENTITY NO
DELIM GENERAL SGMLREF
SHORTREF SGMLREF
NAMES SGMLREF
QUANTITY SGMLREF
NAMELEN 72 -- somewhat arbitrary; taken from
internet line length conventions --
TAGLVL 100
LITLEN 1024
GRPGTCNT 150
GRPCNT 64
FEATURES
MINIMIZE
DATATAG NO
OMITTAG YES
RANK NO
SHORTTAG YES
LINK
SIMPLE NO
IMPLICIT NO
EXPLICIT NO
OTHER
CONCUR NO
SUBDOC NO
FORMAL YES
APPINFO NONE
>
<!--
$Id: html.decl,v 1.9 1994/11/15 19:54:44 connolly Exp $
Author: Daniel W. Connolly <connolly@hal.com>
See also: http://www.hal.com/%7Econnolly/html-spec
http://info.cern.ch/hypertext/WWW/MarkUp/MarkUp.html
-->
To assist the interoperability among various SGML tools and systems, the SGML Open consortium has passed a technical resolution that defines a format for an application-independent entity catalog that maps external identifiers and/or entity names to file names.
Each entry in the catalog associates a storage object identifier (such as a file name) with information about the external entity that appears in the SGML document. In addition to entries that associate public identifiers, a catalog entry can associate an entity name with a storage object indentifier. For example, the following are possible catalog entries:
PUBLIC "ISO 8879:1986//ENTITIES Added Latin 1//EN" "iso-lat1.gml" PUBLIC "-//ACME DTD Writers//DTD General Report//EN" report.dtd ENTITY "graph1" "graphics\graph1.cgm"In particular, the following shows entries relevant to HTML.
-- catalog: SGML Open style entity catalog for HTML --
-- $Id: catalog,v 1.1 1994/10/07 21:35:07 connolly Exp $ --
-- Ways to refer to Level 2: most general to most specific --
PUBLIC "-//IETF//DTD HTML//EN" html.dtd
PUBLIC "-//IETF//DTD HTML//EN//2.0" html.dtd
PUBLIC "-//IETF//DTD HTML Level 2//EN" html.dtd
PUBLIC "-//IETF//DTD HTML Level 2//EN//2.0" html.dtd
-- Ways to refer to Level 1: most general to most specific --
PUBLIC "-//IETF//DTD HTML Level 1//EN" html-1.dtd
PUBLIC "-//IETF//DTD HTML Level 1//EN//2.0" html-1.dtd
-- Ways to refer to Level 0: most general to most specific --
PUBLIC "-//IETF//DTD HTML Level 0//EN" html-0.dtd
PUBLIC "-//IETF//DTD HTML Level 0//EN//2.0" html-0.dtd
-- ISO latin 1 entity set for HTML --
PUBLIC "-//IETF//ENTITIES Added Latin 1//EN" ISOlat1.sgml
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