start tags following headers, which can easily be inferred from the context. The HTML+ DTD which is structured as an HTML core plus a number of additional modules which can be included by an entity definition in a document's element. You can include specific features in your document using the DOCTYPE declaration at the start, e.g. ]> This spec also allows for authors to extend the DTD and to define how any new elements are rendered in terms of existing ones. This should be used with caution. I would like to acknowledge the influence of the TEI DTDs which proved very helpful in restructuring the DTD. Dave Raggett 5th April 1994 Changes: Added align attribute to headers with same values and meaning as for paragraphs. Added prologue and epilogue elements and fixed bug in definition of %paras with HTML.emph. Added entity names for standard icons c/o Bert Bos. This are enabled with the HTML.icons switch. Added PRE to content model for LI and DD, and changed DL to require at least one DT per DD. Math is now part of %text; but can't be nested. Tried to permit an optional epilogue following last division, but sgmls gave: Content model is ambiguous Added support for graphical menus to SELECT/OPTION. Liberalised content model for headers to %text; Added optional NOFOLD attribute to P element to inhibit SGML folding of whitespace. Dropped the LIT element and changed the TAB element over to the LaTeX model. Added NOWRAP to P element. Replaced TH/TD's align=numeric with ALIGNON="." etc. Made anchor NAME attribute conditional on HTML.obsolete Added HTML.obsolete for obsoleted HTML elements Added SIG attribute to A and LINK for specifying a digital signature to attest that a linked document is unchanged. SRC attribute added to NOTE to allow authors to override the default icon chosen on the basis of the ROLE attribute. Switched REL/REV back to CDATA to avoid trouble with duplicate name or name token error. Using an explicit list of relationship types would force us to drop REV. Added top/bottom alignment attribute to CAPTION REL and REV domains now defined by parameter entities SRC attribute added to LINK to allow images to be used in document specific toolbar Baseline attribute added to FIG and IMG to give precise control of vertical position relative to baseline. Revised comments for and to remove references to obsoleted timing attributes and to add a list of "standard" relationship types. CHANGED element now uses more meaningful attribute names. STATE dropped in favor of INPUT with TYPE="hidden". Forms now support a link to a script for client-side execution of constraints. The element definition for DIV1..DIV6 and P no longer permit the start tag to be omitted. This was regrettably forced by a restriction in the SGML standard. Browsers *must* be capable of inferring them when missing,in order to cope with legacy documents. Fixed some errors in earlier version to do with start tags and definitions of parameter entities. The content model for FIG has been changed to use a P element for text to avoid an SGML parsing problem with a line break before the caption. -- 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 95 32 255 1 UNUSED 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 31 127 255 BASESET "ISO 646:1983//CHARSET International Reference Version (IRV)//ESC 2/5 4/0" 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 NAMELEN 32 TAGLVL 100 LITLEN 1024 GRPGTCNT 150 GRPCNT 64 FEATURES MINIMIZE DATATAG NO OMITTAG YES RANK NO SHORTTAG NO LINK SIMPLE NO IMPLICIT NO EXPLICIT NO OTHER CONCUR NO SUBDOC NO FORMAL YES APPINFO NONE > declaration is fine. Browsers should be forgiving of markup errors, while authoring tools *should* enforce compliance with the DTD. Common Attributes: id This attribute allows authors to name elements such as headers and paragraphs as potential destinations for links. Note that links don't specify points, but rather extended objects. charset This allows authors to switch to a different char set for quotations or list etc. This is particularly useful for oriental languages which need two byte character codes, e.g. see RFC 1468 "Japanese Character Encoding for Internet Messages" ENTITY DECLARATIONS is a macro definition for parameters and in subsequent statements, the string "%foo;" is expanded to "X | Y | Z" Various classes of SGML text types: CDATA text which doesn't include markup or entity references RCDATA text with entity references but no markup PCDATA text occurring in a context in which markup and entity references may occur. --> ]]> ]]> ]]> ]]> ]]> ]]> ]]> ]]> ]]> ]]> ]]> ]]> %ISOlat1; %ISOnum; %ISOdia; ]]> %ISOtech; %ISOgrk3; %ISOamso; %ISOamsr; %ISOamsc; ]]> ]]> ]]> ]]> ]]> ]]> ]]> ]]> element is used for shaped buttons handled by browser, while the ISMAP mechanism sends pointer clicks/drags to server. The text contained by this element is used for text-only displays and authors should remember to provide effective descriptions, including label text for shaped buttons. --> ]]> and ^{are used for subscripts and superscripts i j X iYj is X Y i.e. the space following the X disambiguates the binding. --> ]]> ]>}

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