20 SGML-classified HTML 4.0
Note. The total number of code elements in the document character set of this SGML ads may include the first 17 levels of [ISO10646] (17 times 65,536). This restriction is imposed because the number in the current standard SGML has a maximum length of 8 digits. This does not mean that the restriction of characters in UCS first 17 levels will remain for a long time. It is very likely that the restriction of 8 digits in SGML will be removed, and this specification will be updated.
Note. Strictly speaking, ISO Registration Number 177 refers to the initial state of [ISO10646] in 1993, while in this specification, we always mean the latest version of ISO 10646. Changes in 1993 included the addition of characters and one-time operation reallocating a large number of codepoints for Korean Hangul (Amendment 5).
20.1 Announcement SGML
<SGML "ISO 8879: 1986"! - Hypertext Markup Language SGML Announcement 4.0 With support for the first 17 levels and ISO 10646 increased length and literal tags, 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 September 2 February 11 UNUSED 13 on January 13 14 18 UNUSED 32 95 32 127 1 UNUSED 128 32 UNUSED 160 55136 160 55296 2048 UNUSED - SURROGATES - 57344 1,056,768 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 0128 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 65,536 - the maximum values - LITLEN 65536 - permitted in the declaration - NAMELEN 65536 - Avoid fixed limits - PILEN 65,536 - in the implementation of user agents HTML - 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 >
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