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Note. The total number of codepointsallowed in the document character set of this SGML declaration includes thefirst 17 planes of[ISO10646] (17 times 65536). This limitation has been madebecause this number is limited to a length of 8 digits in the current versionof the SGML standard. It does not imply any statement about the feasibility ofa long-term restriction of characters in UCS to the first 17 planes. Chancesare 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 acharacter beyond the first 17 planes.

Note. Strictly speaking, ISO Registration Number 177refers to the original state of[ISO10646] in 1993.Changes since 1993 have been the addition of characters and a one-timeoperation reallocating a large number of codepoints for Korean Hangul(Amendment 5). Revisions of the HTML 4 specification may update the referenceto ISO 10646 to include additional changes.

20.1 SGML Declaration

<!SGML  "ISO 8879:1986 (WWW)"    --         SGML Declaration for HyperText Markup Language version HTML 4          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 57344CAPACITY        SGMLREF                TOTALCAP        150000                GRPCAP          150000                ENTCAP          150000SCOPE    DOCUMENTSYNTAX         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                  HCRO "&#38;#x" -- 38 is the number for ampersand --                  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   64FEATURES  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>

Movatterモバイル変換

20SGML Declaration of HTML4

20.1 SGML Declaration