📄 sgmldecl.htm

📁 SP是一个基于GNU C++编译器
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML Strict//EN"><HTML><HEAD><TITLE>SP - SGML declaration</TITLE></HEAD><BODY><H1>Handling of the SGML declaration in SP</H1><H2>Extended Naming Rules</H2><P>SP supports the Extended Naming Rules as specified in Annex Jof ISO 8879:1986 (added by the 1996 technical corrigendum).<H2>Default SGML declaration</H2><P>If the SGML declaration is omittedand there is no applicable<A HREF="catalog.htm#sgmldecl"><SAMP>SGMLDECL</SAMP></A>entry in a catalog,the following declaration will be implied:<PRE>		    &lt;!SGML "ISO 8879:1986"			    CHARSETBASESET  "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 UNUSEDCAPACITY PUBLIC    "ISO 8879:1986//CAPACITY Reference//EN"SCOPE    DOCUMENTSYNTAXSHUNCHAR 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 255BASESET  "ISO 646-1983//CHARSET International Reference Version	  (IRV)//ESC 2/5 4/0"DESCSET  0 128 0FUNCTION RE                    13	 RS                    10	 SPACE                 32	 TAB       SEPCHAR     9NAMING   LCNMSTRT  ""	 UCNMSTRT  ""	 LCNMCHAR  "-."	 UCNMCHAR  "-."	 NAMECASE  GENERAL     YES		   ENTITY      NODELIM    GENERAL   SGMLREF	 SHORTREF  SGMLREFNAMES    SGMLREFQUANTITY SGMLREF	 ATTCNT    99999999	 ATTSPLEN  99999999	 DTEMPLEN  24000	 ENTLVL    99999999	 GRPCNT    99999999	 GRPGTCNT  99999999	 GRPLVL    99999999	 LITLEN    24000	 NAMELEN   99999999	 PILEN     24000	 TAGLEN    99999999	 TAGLVL    99999999			   FEATURESMINIMIZE DATATAG   NO	 OMITTAG   YES	 RANK      YES	 SHORTTAG  YESLINK     SIMPLE    YES 1000	 IMPLICIT  YES	 EXPLICIT  YES 1OTHER    CONCUR    NO	 SUBDOC    YES 99999999	 FORMAL    YES			  APPINFO NONE></PRE><P>with the exception that all characters that are neither significantnor shunned will be assigned to DATACHAR.<H2><A NAME="charset">Character sets</A></H2><P>A character in a base character set is described either by giving itsnumber in a <i>universal</i> character set, or by specifying a minimumliteral.The first 65536 character numbers in the <i>universal</i> characterset are assumed to be the same as in Unicode 2.0 (ISO/IEC 10646).The remaining character numbers can be assigned in any way convenient.<P>The public identifier of a base character set can be associatedwith an entity that describes it by using a<SAMP>PUBLIC</SAMP>entry in the catalog entry file.The entity must be a fragmentof an SGML declarationconsisting of theportion of a character set description,following the DESCSET keyword,that is, it must be a sequence of character descriptions,where each character description specifies a described characternumber, the number of characters andeither a character number in the universal character set, a minimum literalor the keyword<SAMP>UNUSED</SAMP>.Character numbers in the universal character set can be as big as99999999.<P>In addition SP has built in knowledge of many character sets.These are identified using the designating sequence in thepublic identifier.  The following designating sequences arerecognized:<DL><DT><SAMP>ESC 2/5 4/0</SAMP><DD>The full set of ISO 646 IRV.This is not a registered character set,but is recommended by ISO 8879 (clause 10.2.2.4).<DT><SAMP>ESC 2/8 4/0</SAMP><DD>G0 set of ISO 646 IRV,ISO Registration Number 2.<DT><SAMP>ESC 2/8 4/2</SAMP><DD>G0 set of ASCII,ISO Registration Number 6.<DT><SAMP>ESC 2/1 4/0</SAMP><DD>C0 set of ISO 646,ISO Registration Number 1.<DT><SAMP>ESC 2/13 4/1</SAMP><DD>G1 set of ISO 8859-1<DT><SAMP>ESC 2/13 4/2</SAMP><DD>G1 set of ISO 8859-2<DT><SAMP>ESC 2/13 4/3</SAMP><DD>G1 set of ISO 8859-3<DT><SAMP>ESC 2/13 4/4</SAMP><DD>G1 set of ISO 8859-4<DT><SAMP>ESC 2/13 4/12</SAMP><DD>G1 set of ISO 8859-5<DT><SAMP>ESC 2/13 4/7</SAMP><DD>G1 set of ISO 8859-6<DT><SAMP>ESC 2/13 4/6</SAMP><DD>G1 set of ISO 8859-7<DT><SAMP>ESC 2/13 4/8</SAMP><DD>G1 set of ISO 8859-8<DT><SAMP>ESC 2/13 4/13</SAMP><DD>G1 set of ISO 8859-9<DT><SAMP>ESC 2/8 4/10</SAMP><DD>Roman set from JIS-X-0202.JIS version of ISO 646.ISO Registration Number 14.<DT><SAMP>ESC 2/8 4/9</SAMP><DD>Katakana set from JIS X 0201.ISO Registration Number 13.<DT><SAMP>ESC 2/4 4/2</SAMP><DT><SAMP>ESC 2/6 4/0 ESC 2/4 4/2</SAMP><DD>JIS X 0208-1990.ISO Registration Numbers 87 and 168.<DT><SAMP>ESC 2/4 2/8 4/4</SAMP><DD>JIS X 0212-1990.ISO Registration Number 159.<DT><SAMP>ESC 2/4 4/1</SAMP><DD>GB 2312-80.ISO Registration Number 58.<DT><SAMP>ESC 2/4 2/8 4/3</SAMP><DD>KS C 5601-1992.ISO Registration Number 149.<DT><SAMP>ESC 2/5 2/15 4/0</SAMP><DT><SAMP>ESC 2/5 2/15 4/3</SAMP><DT><SAMP>ESC 2/5 2/15 4/5</SAMP><DD>ISO/IEC 10646 UCS-2<DT><SAMP>ESC 2/5 2/15 4/1</SAMP><DT><SAMP>ESC 2/5 2/15 4/4</SAMP><DT><SAMP>ESC 2/5 2/15 4/6</SAMP><DD>ISO/IEC 10646 UCS-4</DL><H2>Concrete syntaxes</H2><P>The public identifier for a public concrete syntax can be associatedwith an entity that describes using a<SAMP>PUBLIC</SAMP>entry in the catalog entry file.The entity must be a fragment of an SGML declarationconsisting of a concrete syntax descriptionstarting with the<SAMP>SHUNCHAR</SAMP>keywordas in an SGML declaration.The entity can also make use of the following extensions:<UL><LI>The Extended Naming Rules extensions can be used regardless of the minimumliteral used in the SGML declaration.<LI>An<I>added function</I>can be expressed as a parameter literalinstead of a name.<LI>The replacement for a reference reserved namecan be expressed as a parameter literal instead of a name.<LI>The total number of characters specified for<SAMP>UCNMCHAR</SAMP>or<SAMP>UCNMSTRT</SAMP>may exceed the total number of characters specified for<SAMP>LCNMCHAR</SAMP>or<SAMP>LCNMSTRT</SAMP>respectively.Each character in<SAMP>UCNMCHAR</SAMP>or<SAMP>UCNMSTRT</SAMP>which does not have a corresponding character in the same position in<SAMP>LCNMCHAR</SAMP>or<SAMP>LCNMSTRT</SAMP>is simply assigned to <SAMP>UCNMCHAR</SAMP> or <SAMP>UCNMSTRT</SAMP>without making it the upper-case form of any character.<LI>Within the specification of the short reference delimiters,a parameter literal containing exactly one charactermay be followed by the delimiter <SAMP>-</SAMP>and another parameter literal containing exactly one character.This has the same meaning as a sequence of parameter literalsone for each character number that is greater than or equalto the number of the character in the first parameter literaland less than or equal to the number of the character in thesecond parameter literal.<LI>A number may be used as a delimiter in the<SAMP>DELIM</SAMP>section with the same meaning as a parameter literalcontaining just a numeric character reference with that number.</UL><H2>Capacity sets</H2><P>The public identifier for a public capacity set can be associatedwith an entity that describes using a<SAMP>PUBLIC</SAMP>entry in the catalog entry file.The entity must be a fragment of an SGML declarationconsisting of a sequence of capacity names and numbers.<P><ADDRESS>James Clark<BR>jjc@jclark.com</ADDRESS></BODY></HTML>
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