SGML Declaration of HTML 4.0

Note. The total number of codepoints allowed in the document character set of this SGML declaration includes the first 17 planes of [ISO10646] (17 times 65536). This limitation has been made because this number is limited to a length of 8 digits in the current version of the SGML standard. It does not imply any statement about the feasibility of a long-term restriction of characters in UCS to the first 17 planes. Chances are very high that the limitation to 8 digits in SGML will be removed before, and that this specification will be updated before, the first assignment of a character beyond the first 17 planes.

Note. Strictly speaking, ISO Registration Number 177 refers to the original state of [ISO10646] in 1993, while in this specification, we always refer to the most up-to-date form of ISO 10646. Changes since 1993 have been the addition of characters and a one-time operation reallocating a large number of codepoints for Korean Hangul (Amendment 5).

20.1 SGML Declaration


<!SGML  "ISO 8879:1986"

    --

         SGML Declaration for HyperText Markup Language version 4.0

 

         With support for the first 17 planes of ISO 10646 and

         increased limits for tag and literal lengths etc.

    --

 

    CHARSET

          BASESET  "ISO Registration Number 177//CHARSET

                    ISO/IEC 10646-1:1993 UCS-4 with

                    implementation level 3//ESC 2/5 2/15 4/6"

         DESCSET 0       9       UNUSED

                 9       2       9

                 11      2       UNUSED

                 13      1       13

                 14      18      UNUSED

                 32      95      32

                 127     1       UNUSED

                 128     32      UNUSED

                 160     55136   160

                 55296   2048    UNUSED  -- SURROGATES --

                 57344   1056768 57344



CAPACITY        SGMLREF

                TOTALCAP        150000

                GRPCAP          150000

                ENTCAP          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 646IRV:1991//CHARSET

                   International Reference Version

                   (IRV)//ESC 2/8 4/2"

         DESCSET  0 128 0



         FUNCTION

                  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

                  ATTCNT   60      -- increased --

                  ATTSPLEN 65536   -- These are the largest values --

                  LITLEN   65536   -- permitted in the declaration --

                  NAMELEN  65536   -- Avoid fixed limits in actual --

                  PILEN    65536   -- implementations of HTML UA's --

                  TAGLVL   100

                  TAGLEN   65536

                  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

>

20 SGML Declaration of HTML 4.0

20.1 SGML Declaration