Mercurial > hg > xemacs-beta
diff etc/sgml/html-3.dtd @ 0:376386a54a3c r19-14
Import from CVS: tag r19-14
| author | cvs |
|---|---|
| date | Mon, 13 Aug 2007 08:45:50 +0200 |
| parents | |
| children | ac2d302a0011 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/etc/sgml/html-3.dtd Mon Aug 13 08:45:50 2007 +0200 @@ -0,0 +1,1444 @@ +<!-- + html3.dtd + + Document Type Definition for the HyperText Markup Language (HTML DTD) + + Draft: Fri 24-Mar-95 09:46:33 + + Author: Dave Raggett <dsr@hplb.hpl.hp.com> + + W3O is developing a testbed browser to provide practical + experience with HTML 3.0 before it becomes a standard. + See: http://www.w3.org/hypertext/WWW/Arena/ + + This is an open process and comments are welcomed on the + www-html mailing list. + + Please use the following MIME content type: + + Content-Type: text/html; version=3.0 + + This will allow clients to distinguish HTML 3.0 from current + HTML documents. This is most easily achieved by saving + files with the extension ".html3" or ".ht3" so that servers + can easily distinguish these files from HTML 2.0 files. + + The entity HTML.Recommended can be used to give a more rigorous + version of the DTD suitable for use with SGML authoring tools. + The default version of the DTD offers a laxer interpretation, + e.g. allowing authors to omit leading <P> elements. You can + switch on the more rigorous version of the DTD by including + the following at the start of your HTML document. + + <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 3.0//EN//" + [ <!ENTITY % HTML.Recommended "INCLUDE"> ] > + + + Design Objectives: + + o Backwards compatibility with 2.0 + + o Tightening up HTML.Recommended and + moving more things to HTML.Deprecated + + o Keep HTML - simple don't compete with CALS + + o Make it practical for people to edit HTML 3.0 + documents directly, i.e. avoid long names. + + o Tables, figures and math from HTML+ + with tweaks based on recent experience + + o Client-side event handling for figures + and graphical form selection menus + + o Add limited presentational controls with + a view to use of linked style sheets + (style overrides are supported) + + o Compatibility with ICADD as per Yuri's suggestions + + HTML 3.0 relies on linked style info to give authors + control over the appearence of documents. Such info is + placed in a linked style sheet, or as overrides in the + HTML document head, using the STYLE element. The generic + CLASS attribute can be used to subclass elements when + you want to use a different style from normal, e.g. you + might use <h2 class=bigcaps> for headers with enlarged + capital letters. Note that the class attribute has a + wider scope than just style changes, e.g. browsers could + provide the means for searching through documents, + restricting search according to element class values. + + The DTD contains a small number of attributes for direct + control of basic alignment parameters; column widths for + tables; support for custom bullets, sequence numbering for + lists and headers; and text flow. These attributes offer + control over appearence which would be inconvenient to + express exclusively via associated style sheets. + + The MD attribute for each hypertext or inline link specifies a + message digest such as MD5 for the linked object and is needed + to ensure someone hasn't tampered with a linked document. + + History: + + 24th March '95 + + Changed ROLE->CLASS for HTML element + Added dummy elements to fix problem with mixed + content models for BODY, BLOCKQUOTE/BQ and FIG + Dropped audio fields from FORMs + Reinstated MIN/MAX for range fields + Reinstated DISABLED and ERROR attributes for fields + + 22nd March '95 + + Changed from em to en units. The latter + is a typographical unit = half point size + Merged NEEDS into CLEAR for control of textflow + + 21st March '95 + + Added REL=Banner to LINK element + Added BANNER element in place of <DIV CLASS=BANNER> + Added RANGE and SPOT elements + Added FN in place of <NOTE ROLE=FOOTNOTE> + Changed ROLE->CLASS for NOTE element + + 17th March '95 + + Fixed bug in PRE content model + Changed external references to omit trailling // + Dropped <!DOCTYPE HTML [ ... ]> wrapper to avoid problems + with "real" sgml parsers + Added NOFLOW attribute to FIG and TABLE + Fixed typo in IMG ALIGN attribute + Made SELECT match IMG for graphic attributes + Added decimal alignment for tabs and table cells + Added ALIGN attribute to TEXTAREA for parity + with IMG and INPUT, including ALIGN=LEFT etc. + + 13th March '95 + + Dropped MARK tag on advice from SGML Open + Allowed spaces in table colspec attribute + Changed ARRAY element + Added CHOOSE tag to BOX element + Cleaned up PRE content model + Obsoleted tags incompatible with SGML + + 6th March '95 + + Added several tags to MATH: %mathface, %mathvec + and improved ROOT, with new SQRT convience tag + + 1st March '95 + + Dropped align attribute from BR element + Added indent attribute to TAB + Added optional CREDIT to end of BQ + Changed FIG to %body.content to allow headers + + 22nd February '95 + + Added align attribute, and dropped before, after, center and right + attributes to clean up TAB element + Added INS and DEL for legal documents + Added CREDIT to end of FIG element + Dropped FN in favor of <NOTE ROLE=FootNote> + + 9th Feburuary '95 + + Dropped base attribute mechanism for scoping relative URLs + Dropped nofold attribute for disabling whitespace folding + Dropped border width attributes for FIG (-> style sheet) + Dropped delims attribute from math BOX element + Dropped stylistic attributes from OL such as inherit (-> stylesheet) + Added baseline to list of valign attribute values for tables. + Added DIV element for generic container class and static banners + Added MARK element for marked range class + Added closed set of LINK REL values for toolbars + Added numbering attributes to headers + Added bullet attributes to headers + Added TERM element to math for style sheet control of term rendering + Changed to imagemap=URI for server-side event handling for FIG/OVERLAY + Changed delimiter attributes for math arrays + Changed ROOT element for maths to allow an arbitrary radix + Simplified numbering attributes for ordered lists + Simplified STYLE element to leave binding to style language +--> + +<!ENTITY % HTML.Version + "-//IETF//DTD HTML 3.0//EN" + + -- Typical usage: + + <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 3.0//EN"> + <html> + ... + </html> + -- + > + +<!--================== Flags for Marked Sections ==========================--> + +<!ENTITY % HTML.Recommended "IGNORE" + -- Certain features of the language are necessary for compatibility + with widespread usage, but they may compromise the structural + integrity of a document. This feature test entity enables + a more prescriptive document type definition that eliminates + the above features. + --> + +<![ %HTML.Recommended [ + <!ENTITY % HTML.Deprecated "IGNORE"> +]]> + +<!ENTITY % HTML.Deprecated "INCLUDE" + -- Certain features of the language are necessary for compatibility + with earlier versions of the specification, but they tend + to be used an implemented inconsistently, and their use is + deprecated. This feature test entity enables a document type + definition that eliminates these features. + --> + +<!ENTITY % HTML.Obsoleted "IGNORE" + -- The XMP, LISTING and PLAINTEXT tags are incompatible with SGML + and derive from very early versions of HTML. They require non- + standard parsers and will cause problems for processing + documents with standard SGML tools. + --> + +<!--================== Imported Names =====================================--> + +<!ENTITY % Content-Type "CDATA" + -- meaning a MIME content type, as per RFC1521 + --> + +<!ENTITY % HTTP-Method "GET | POST" + -- as per HTTP specification + --> + +<!ENTITY % URI "CDATA" + -- The term URI means a CDATA attribute + whose value is a Uniform Resource Identifier, + as defined by + "Uniform Resource Identifiers" by Tim Berners-Lee + aka http://info.cern.ch/hypertext/WWW/Addressing/URL/URI_Overview.html + aka RFC 1630 + + Note that CDATA attributes are limited by the LITLEN + capacity (1024 in the current version of html.decl), + so that URIs in HTML have a bounded length. + + --> + +<!ENTITY % REAL "CDATA" -- real numbers (not in SGML) --> + +<!ENTITY % SHAPE "CDATA" + -- Shape of hotzone in image. + + All coordinates are assumed to be numbers in the range 0 to 1 + and interpreted as fractional width/height and measured from + the top left corner of the associated image. + + The attribute value is a string taking one of the following forms: + + "default" + + Used to define a default link for the figure background. + + "circle x, y, r" + + (x, y) define the center and r the radius. + + "rect x, y, w, h" + + (x, y) defines upper left, and w and h the width and height. + + "polygon x1, y1, x2, y2, ..." + + Given n pairs of x, y coordinates, the polygon is closed by a + line linking the n'th point to the first. Intersecting polygons + use the non-zero winding number rule to determine if a point lies + inside the polygon.I + -- +> + +<!-- 3.0 Parameter Entities --> + +<!ENTITY % heading "H1|H2|H3|H4|H5|H6"> + +<![ %HTML.Obsoleted [ + <!ENTITY % preformatted "PRE | XMP | LISTING"> +]]> + + +<![ %HTML.Deprecated [ + <!ENTITY % list "UL | OL | DIR | MENU"> + <!ENTITY % blockquote "BLOCKQUOTE | BQ"> +]]> + +<!ENTITY % list "UL | OL"> + +<!ENTITY % blockquote "BQ"> + +<!ENTITY % preformatted "PRE"> + + +<!-- The CLASS attribute is used to subclass HTML elements for + rendering purposes, when used with style sheets, e.g. DSSSL lite --> + +<!ENTITY % attrs -- common attributes for elements -- + 'id ID #IMPLIED -- as target for hrefs (link ends) -- + lang CDATA "en.us" -- ISO language, country code -- + class NAMES #IMPLIED -- for subclassing elements --'> + +<!-- SGML standard forces different NAMES for all attribute values + in the same element, regardless of the attribute name! As a result + CDATA is used for CLEAR attribute to avoid clash with ALIGN attribute.--> + +<!-- +When text flows around a figure or table in the margin, you sometimes want +to start an element like a header, paragraph or list below the figure rather +than alongside it. The CLEAR attribute allows you to move down unconditionally: + + clear=left move down until left margin is clear + clear=right move down until right margin is clear + clear=all move down until both margins are clear + +Alternatively, you can decide to place the element alongside the figure just +so long as there is enough room. The minimum width needed is specified as: + + clear="40 en" move down until there is at least 40 en units free + clear="100 pixels" move down until there is at least 100 pixels free + +The style sheet (or browser defaults) may provide default minimum widths for +each class of block-like elements. +--> + +<!ENTITY % needs -- Attributes for controlling text flow. Used in headers + and other elements to guarantee sufficient room -- + 'clear CDATA #IMPLIED'> + +<!-- + The following attribute may be included where ever a URL can be given: + + md message digest e.g. md="md5:jV2OfH+nnXHU8bnkPAad/mSQlTDZ" + where the digest is base64 encoded and preceded by a prefix + denoting the algorithm (in this case MD5). +--> + +<!ENTITY % url.link -- Attributes associated with URL based links -- + "md CDATA #IMPLIED -- message digest for linked object --"> + +<!--================ Character mnemonic entities ==========================--> + +<!-- The HTML list of Latin-1 entities includes the full range + of characters in widely available Latin-1 fonts, and as such + is a mixture of ISOlat1 and other ISO publishing symbols --> + +<!ENTITY % HTMLlat1 PUBLIC + "-//IETF//ENTITIES Added Latin 1 for HTML//EN"> +%HTMLlat1; + +<!--================ Entities for special symbols =========================--> + +<!ENTITY emsp SDATA "[emsp ]" -- em space --> +<!ENTITY ensp SDATA "[ensp ]" -- en space (1/2-em) --> +<!ENTITY mdash SDATA "[ndash ]" -- em dash --> +<!ENTITY ndash SDATA "[ndash ]" -- en dash (1/2-em) --> +<!ENTITY nbsp SDATA "[nbsp ]" -- non breaking space --> +<!ENTITY shy SDATA "[shy ]" -- soft hyphen --> +<!ENTITY copy SDATA "[copy ]" -- copyright sign --> +<!ENTITY trade SDATA "[trade ]" -- trade mark sign --> +<!ENTITY reg SDATA "[reg ]" -- registered sign --> + +<!--================ Entities for standard icons ==========================--> + +<!-- a range of standard icons such as &folder; for use + in speeding up display of directory listings etc. --> + +<!-- <!ENTITY % HTMLicons PUBLIC --> +<!-- "-//IETF//ENTITIES icons for HTML//EN"> --> +<!-- %HTMLicons; --> + +<!--================ Entities for math symbols ============================--> + +<!-- ISO subset chosen for use with the widely available Adobe math font --> + +<!-- <!ENTITY % HTMLmath PUBLIC --> +<!-- "-//IETF//ENTITIES Math and Greek for HTML//EN"> --> +<!-- %HTMLmath; --> + +<!--=================== Text Markup =======================================--> + +<!ENTITY % font " U | S | TT | I | BIG | SMALL"> + +<!ENTITY % phrase "EM | STRONG | CODE | SAMP | KBD | VAR | CITE"> + +<!ENTITY % misc "Q | LANG | AU | DFN | PERSON | ACRONYM | ABBREV | INS | DEL"> + +<!ENTITY % special "TAB | MATH | A | IMG | BR"> + +<!ENTITY % notmath "%font | %phrase | %special | %misc"> + +<!ENTITY % text "#PCDATA | SUB | SUP | B | %notmath"> + + +<!ENTITY % pre.exclusion "TAB|MATH|IMG|BIG|SMALL|SUB|SUP"> + +<!ELEMENT (%font|B|%phrase|%misc) - - (%text)+> +<!ATTLIST (%font|B|%phrase|%misc) %attrs;> + +<!-- Subscripts and superscripts. The ALIGN attribute is only used for math --> + +<!ELEMENT (SUB|SUP) - - (%text)+> +<!ATTLIST (SUB|SUP) + %attrs; + align (left|center|right) #IMPLIED + > + +<!-- Forced line break --> + +<!ELEMENT BR - O EMPTY> +<!ATTLIST BR + %attrs; + %needs; -- for control of text flow -- + > + +<!-- Named left, center and right tab stops (independent of '\t' char) --> + +<!ELEMENT TAB - O EMPTY> +<!ATTLIST TAB + id ID #IMPLIED -- defines named tab stop -- + indent NUMBER 0 -- en units before new tab stop -- + to IDREF #IMPLIED -- jump to named tab stop -- + align (left|center|right|decimal) left + dp CDATA #IMPLIED -- decimal point e.g. dp="," -- + > + +<!--================== Link Markup ========================================--> + +<!-- + With HTML 3.0 you can use ID attributes on most elements for named + link ends. The use of the NAME attribute on anchors is deprecated. + + Do we want to support arbitrary elements for link starts? This would + involve adding HREF and related attributes to most elements. +--> + +<![ %HTML.Deprecated [ + <!ENTITY % linkName "name CDATA #IMPLIED -- named link end --"> +]]> + +<!ENTITY % linkName ""> + + +<!ENTITY % ToolBar "home|toc|index|glossary|copyright| + up|previous|next|help|bookmark" + + -- LINK RELationship values which are used to create toolbar + buttons or menu items for navigation, where toc stands + for table of contents and bookmark provides for an open + ended set of links, i.e. you can use multiple bookmarks + for key entry points. Use the optional TITLE attribute + to override default names. + --> + +<!ENTITY % linkType "NAME" + -- A definitive list will be specified at a later date. + + They are used + + a) by stylesheets to control how collections of + html nodes are rendered into printed documents + + b) for document specific toolbars/menus when used + with the LINK element in document head: + + "home|toc|index|glossary|copyright| + up|previous|next|help|bookmark" + + where toc stands for table of contents and + bookmark provides for an open ended set of links, + i.e. you can use several bookmarks for key entry + points. Use the optional TITLE attribute to + override default names. + + c) for hypertext paths or guided tours, + with REL=NODE and REL=PATH. + + d) to make a link to a style sheet, e.g. rel=stylesheet + (used only with the LINK element). + + e) to make a link to a separate banner, e.g. rel=banner + (used only with the LINK element). + --> + + +<!ENTITY % linkExtraAttributes -- URN moved to %url.link -- + "rel %linkType #IMPLIED -- forward relationship type -- + rev %linkType #IMPLIED -- reversed relationship type + to referent data -- + title CDATA #IMPLIED -- advisory only -- + methods NAMES #IMPLIED -- supported public methods of the object: + TEXTSEARCH, GET, HEAD, ... -- + "> + +<![ %HTML.Deprecated [ + <!ENTITY % A.content "(%heading|%text)+"> +]]> + +<!ENTITY % A.content "(%text)+"> + +<!ELEMENT A - - %A.content -(A)> + +<!ATTLIST A + %attrs; + href %URI; #IMPLIED + %url.link; -- standard link attributes -- + %linkName; -- name attribute is deprecated; use ID instead -- + shape %SHAPE; #IMPLIED -- for shaped hotzones in FIGs -- + %linkExtraAttributes; + > + +<!--=================== Images ============================================--> + +<!-- Desired widths are used for negotiating image size + with the module responsible for painting the image. + align=left or right cause image to float to margin + and for subsequent text to wrap around image --> + +<!ELEMENT IMG - O EMPTY -- Embedded image --> +<!ATTLIST IMG + %attrs; + src %URI; #REQUIRED -- URI of image to embed -- + %url.link; -- standard link attributes -- + alt CDATA #IMPLIED -- for display in place of image -- + align (top|middle|bottom|left|right) top -- relative to baseline + -- width NUMBER #IMPLIED -- desired width in en's or pixels -- + height NUMBER #IMPLIED -- desired height in en's or pixels -- + units (en|pixels) pixels -- units for width and height -- + ismap (ismap) #IMPLIED -- pass clicks to server -- + > + +<!--=================== Paragraphs=========================================--> + +<!ELEMENT P - O (%text)+> +<!ATTLIST P + %attrs; + align (left|center|right|justify) #IMPLIED + %needs; -- for control of text flow -- + nowrap (nowrap) #IMPLIED -- disable wordwrap -- + > + +<!--=================== Headings, Titles, Sections ========================--> + +<!ELEMENT HR - O EMPTY -- customizable horizontal rule --> +<!ATTLIST HR + %attrs; + src %URI; #IMPLIED -- URI of custom rule graphic -- + %url.link; -- standard link attributes -- + %needs; -- for control of text flow -- + > + +<!-- + Headers can be numbered, although this is a matter for style sheets. + The style sheet controls the numbering style: + + a) whether the parent numbering is inherited, e.g. 5.i.c + where 5 is the current sequence number for H1 headers, and + 1 is the number for H2 headers and 3 for H3 headers. + + b) what style is used for current sequence number + e.g. arabic, upperalpha, loweralpha, upperroman, lowerroman + or a numbering scheme appropriate for the current language + + The skip attribute is used to skip over sequence numbers for items + which have been left out of the list, e.g. skip=3 advances the + sequence number past 3 omitted items. The seqnum sets the sequence + number to a specified value. Note that the style sheet may take + advantage of the sequence number for higher level headers. + + The dingbat or src attributes may be used to specify a bullet like + image to be placed adjacent to the header. Defining this in the + header element simplifies the document markup and avoids the need + to use the clear or needs attribute in the following element to + prevent it flowing around this image. +--> + +<!ELEMENT ( %heading ) - - (%text;)+> +<!ATTLIST ( %heading ) + %attrs; + align (left|center|right|justify) #IMPLIED + %needs; -- for control of text flow -- + seqnum NUMBER #IMPLIED -- starting sequence number -- + skip NUMBER 0 -- skip seq nums for missing items -- + dingbat ENTITY #IMPLIED -- dingbat entity from HTMLicons -- + src (%URI;) #IMPLIED -- bullet defined by graphic -- + %url.link; -- standard link attributes -- + nowrap (nowrap) #IMPLIED -- disable wordwrap -- + > + +<!ELEMENT TITLE - - (#PCDATA) + -- The TITLE element is not considered part of the flow of text. + It should be displayed, for example as the page header or + window title. + --> + +<!--=================== Text Flows ========================================--> + +<!ENTITY % block + "P | %list | DL + | %preformatted + | %blockquote + | FORM | ISINDEX | FN + | TABLE | FIG | NOTE"> + +<!-- + ((%block)* | (%text)*) would be much nicer as it would avoid the need + for a <P> tag when all you want is a few words of text. The problem + is that it also prevents: "<LI> <P>some text" since it forbids PCDATA + and hence the white space between the <LI> and the <P>. +--> + +<![ %HTML.Recommended [ + <!ENTITY % flow "(%block)*"> +]]> + +<!ENTITY % flow "(%text | %block)*"> + +<!ELEMENT PRE - - (%text)* -(%pre.exclusion)> + +<!ATTLIST PRE + %attrs; + width NUMBER #implied + %needs; -- for control of text flow -- + > + +<![ %HTML.Obsoleted [ + +<!ENTITY % literal "CDATA" + -- special non-conforming parsing mode where + the only markup signal is the end tag + in full. This will cause problems for + standard SGML tools! + --> + +<!ELEMENT XMP - - %literal> +<!ELEMENT LISTING - - %literal> +<!ELEMENT PLAINTEXT - O %literal> + +]]> + +<!--=================== Lists =============================================--> + +<!ELEMENT DL - - (LH?, (DT|DD)+) -- this is perhaps too lax? --> +<!ATTLIST DL + %attrs; + %needs; -- for control of text flow -- + compact (compact) #IMPLIED -- more compact style -- + > + +<!ELEMENT DT - O (%text)+> +<!ELEMENT DD - O %flow;> +<!ATTLIST (DT|DD) + %attrs; + %needs; -- for control of text flow -- + > + + +<!ELEMENT (OL|UL) - - (LH?, LI+) -- should we allow a list header ? --> + +<!-- style sheet controls numbering style + a) whether the parent numbering is inherited, e.g. 5.1.c + b) what style is used for current sequence number + e.g. arabic, upperalpha, loweralpha, upperroman, lowerroman + or a numbering scheme for the current language +--> +<!ATTLIST OL + %attrs; + %needs; -- for control of text flow -- + continue (continue) #IMPLIED -- don't restart sequence number -- + seqnum NUMBER #IMPLIED -- starting sequence number -- + compact (compact) #IMPLIED -- reduced interitem spacing -- + > + +<!-- Unordered lists: + + o single or multicolumn with + horizontal or vertical wrapping + + o plain or bulletted list items + + o bullets can be customised via: + - entities (dingbats in HTMLicons) + - external graphic via URL + - individual attributes on LI tags +--> +<!ATTLIST UL + %attrs; + %needs; -- for control of text flow -- + wrap (vert|horiz|none) none -- multicolumn list style -- + plain (plain) #IMPLIED -- suppress bullets -- + dingbat ENTITY #IMPLIED -- dingbat entity from HTMLicons -- + src (%URI;) #IMPLIED -- bullet defined by graphic -- + %url.link; -- standard link attributes -- + compact (compact) #IMPLIED -- reduced interitem spacing -- + > + +<!ELEMENT LH - O (%text;)+ -- list header --> +<!ATTLIST LH %attrs;> + +<!-- + For unordered lists, you can override the standard bullet with + a custom graphic specified via a URI e.g. src="splash.gif" or + a reference to one of the HTMLicons graphics e.g. dingbat=folder + + The skip attribute is used with ordered lists to skip over sequence + numbers for items which have been left out of the list, e.g. skip=3 + advances the sequence number past 3 omitted items. +--> + +<!ELEMENT LI - O %flow; -- list item --> +<!ATTLIST LI + %attrs; + %needs; -- for control of text flow -- + dingbat ENTITY #IMPLIED -- dingbat entity from HTMLicons -- + src (%URI;) #IMPLIED -- custom bullet graphic -- + %url.link; -- standard link attributes -- + skip NUMBER 0 -- skip seq nums for missing items -- + > + +<!-- DIR and MENU are now subsumed by UL with type=plain. Use the + wrap attribute to control wrapping style for multicolumn lists --> + +<![ %HTML.Deprecated [ + <!ELEMENT (DIR|MENU) - - (LI)+ -(%block)> + <!ATTLIST (DIR|MENU) + compact (compact) #IMPLIED> +]]> + +<!--=================== Document Body =====================================--> + +<![ %HTML.Recommended [ + <!ENTITY % body.content "(DIV|%heading|%block|HR|ADDRESS)*" + -- <h1>Heading</h1> + <p>Text ... + is preferred to + <h1>Heading</h1> + Text ... + --> +]]> + +<!ENTITY % body.content "(DIV | %heading | %text | %block | HR | ADDRESS)*"> + +<!ELEMENT BODY O O (BANNER?, BODYTEXT) +(SPOT)> +<!ATTLIST BODY + %attrs; + background %URI; #IMPLIED -- texture tile for document background -- + > + +<!ELEMENT BODYTEXT O O %body.content -- dummy element --> + +<!-- + The BANNER element is used for a banner section which appears at + the top of the window and doesn't scroll with window contents. + This can be used for corporate logos, copyright statements and + disclaimers, as well as customized navigation/search controls. +--> +<!ELEMENT BANNER - - %body.content> +<!ATTLIST BANNER %attrs; > + +<!-- SPOT is used to insert IDs at arbitrary places + e.g. for end points of a marked range (see RANGE) --> +<!ELEMENT SPOT - O EMPTY> +<!ATTLIST SPOT id ID #REQUIRED> + +<!ELEMENT (%blockquote) - - (BODYTEXT, CREDIT?)> +<!ATTLIST (%blockquote) + %attrs; + %needs; -- for control of text flow -- + nowrap (nowrap) #IMPLIED -- disable wordwrap -- + > + +<!ENTITY % address.content "((%text;)* | P*)"> + +<!ELEMENT ADDRESS - - %address.content> +<!ATTLIST ADDRESS + %attrs; + %needs; -- for control of text flow -- + > + +<!-- + DIV can be used with the CLASS attribute to represent different + kinds of container, e.g. chapter, section, abstract, appendix. +--> + +<!ELEMENT DIV - - %body.content> +<!ATTLIST DIV + %attrs; + %needs; -- for control of text flow -- + align (left|center|right) left -- alignment of following text -- + nowrap (nowrap) #IMPLIED -- disable wordwrap -- + > + +<!--================ Forms ===============================================--> + +<!-- + As HTML 2.0 plus a few extensions: + + a) A RANGE control which varies between pair of values + specified with the size attribute, e.g. SIZE="1, 10" + + b) FILE widget for uploading one or more files to a server + + c) SCRIBBLE on image widget that sends the "ink" to the server + + d) SUBMIT/RESET buttons can now be customised with an image. + This subsumes the IMAGE type which is now deprecated. + + e) Graphical SELECTion menus are now supported, using + the new SHAPE attribute on OPTION elements. + + Further extensions are in the pipeline (e.g. table entry, + multiple data formats for textarea fields and client-side + scripts with custom widgets) but will have to wait until + the backlog of implementation work diminishes. +--> + +<!ELEMENT FORM - - %body.content -(FORM) +(INPUT|SELECT|TEXTAREA)> +<!ATTLIST FORM + action %URI #REQUIRED -- server-side form handler -- + method (%HTTP-Method) GET -- see HTTP specification -- + enctype %Content-Type; "application/x-www-form-urlencoded" + script %URI #IMPLIED -- link to client-side script -- + > + +<![ %HTML.Deprecated [ + <!ENTITY % InputType "(TEXT | PASSWORD | CHECKBOX | RADIO | SUBMIT + | RESET | RANGE | FILE | SCRIBBLE | HIDDEN | IMAGE)"> +]]> + +<!ENTITY % InputType "(TEXT | PASSWORD | CHECKBOX | RADIO | SUBMIT + | RESET | RANGE | FILE | SCRIBBLE | HIDDEN)"> + +<!ELEMENT INPUT - O EMPTY> +<!ATTLIST INPUT + %attrs; + type %InputType TEXT + name NAME #IMPLIED -- required for all but submit and reset -- + value CDATA #IMPLIED -- required for radio buttons & checkboxes -- + disabled (disabled) #IMPLIED -- read-only fields -- + error CDATA #IMPLIED -- why field is in error -- + checked (checked) #IMPLIED -- for radio buttons and check boxes -- + size NUMBER #IMPLIED -- visible width of TEXT fields -- + maxlength NUMBER #IMPLIED -- max number of chars for TEXT fields -- + min %REAL #IMPLIED -- lower limit for RANGE fields -- + max %REAL #IMPLIED -- upper limit for RANGE fields -- + accept CDATA #IMPLIED -- list of MIME types for file fields -- + src %URI #IMPLIED -- for fields with background images -- + %url.link; -- standard link attributes -- + align (top|middle|bottom|left|right) top + > + +<!-- + SRC attribute added for graphical selection menus + The WIDTH, HEIGHT and UNITS attributes apply to the + image specified by the SRC attribute. + --> + +<!ELEMENT SELECT - - (OPTION+) -(INPUT|TEXTAREA|SELECT)> +<!ATTLIST SELECT + %attrs; + name CDATA #REQUIRED + multiple (multiple) #IMPLIED + disabled (disabled) #IMPLIED -- read-only menu -- + error CDATA #IMPLIED -- why selections are in error -- + src %URI #IMPLIED -- for graphical selection menus -- + %url.link; -- standard link attributes -- + width NUMBER #IMPLIED -- desired width of in en's or pixels -- + height NUMBER #IMPLIED -- desired height in en's or pixels -- + units (en|pixels) pixels -- units for width and height -- + align (top|middle|bottom|left|right) top + > + +<!ELEMENT OPTION - O (#PCDATA)> +<!ATTLIST OPTION + %attrs; + selected (selected) #IMPLIED + value CDATA #IMPLIED -- default to element content -- + shape %SHAPE; #IMPLIED -- for graphical selection menus -- + disabled (disabled) #IMPLIED -- unselectable option -- + error CDATA #IMPLIED -- why this choice is in error -- + > + +<!-- + Multi-line text input field. align=left or right + causes the field to float to margin and for + subsequent text to wrap around the field. +--> + +<!ELEMENT TEXTAREA - - (#PCDATA) -(INPUT|TEXTAREA|SELECT)> +<!ATTLIST TEXTAREA + %attrs; + name CDATA #REQUIRED + rows NUMBER #REQUIRED + cols NUMBER #REQUIRED + disabled (disabled) #IMPLIED -- read-only field -- + error CDATA #IMPLIED -- why field is in error -- + align (top|middle|bottom|left|right) top + > + +<!--======================= Captions ======================================--> + +<!ELEMENT CAPTION - - (%text;)+ -- table or figure caption --> +<!ATTLIST CAPTION + %attrs; + align (top|bottom|left|right) #IMPLIED + > +<!--======================= Tables ========================================--> + +<!-- + Tables and figures can be aligned in several ways: + + bleedleft flush left with the left (window) border + left flush left with the left text margin + center centered (text flow is disabled for this mode) + right flush right with the right text margin + bleedright flush right with the right (window) border + justify when applicable the table/figure should stretch + to fill space between the text margins + + Note: text will flow around the table or figure if the browser + judges there is enough room and the alignment is not centered + or justified. The table or figure may itself be part of the + text flow around some earlier figure. You can in this case use + the clear or needs attributes to move the new table or figure + down the page beyond the obstructing earlier figure. Similarly, + you can use the clear or needs attributes with other elements + such as headers and lists to move them further down the page. +--> + +<!ENTITY % block.align + "align (bleedleft|left|center|right|bleedright|justify) center"> + +<!-- + The HTML 3.0 table model has been chosen for its simplicity + and the ease in writing filters from common DTP packages. + + By default the table is automatically sized according to the + cell contents and the current window size. Specifying the columns + widths using the colspec attribute allows browsers to start + displaying the table without having to wait for last row. + + The colspec attribute is a list of column widths and alignment + specifications. The columns are listed from left to right with + a capital letter followed by a number, e.g. COLSPEC="L20 C8 L40". + The letter is L for left, C for center, R for right alignment of + cell contents. J is for justification, when feasible, otherwise + this is treated in the same way as L for left alignment. + Column entries are delimited by one or more space characters. + + The number specifies the width in en's, pixels or as a + fractional value of the table width, as according to the + associated units attribute. This approach is more compact + than used with most SGML table models and chosen to simplify + hand entry. The width attribute allows you to specify the + width of the table in pixels, en units or as a percentage + of the space between the current left and right margins. + + To assist with rendering to speech, row and column headers + can be given short names using the AXIS attribute. The AXES + attribute is used to explicitly specify the row and column + names for use with each cell. Otherwise browsers can follow + up columns and left along rows (right for some languages) + to find the corresponding header cells. + + Table content model: Braille limits the width of tables, + placing severe limits on column widths. User agents need + to render big cells by moving the content to a note placed + before the table. The cell is then rendered as a link to + the corresponding note. + + To assist with formatting tables to paged media, authors + can differentiate leading and trailing rows that are to + be duplicated when splitting tables across page boundaries. + The recommended way is to subclass rows with the CLASS attribute + For example: <TR CLASS=Header>, <TR CLASS=Footer> are used for + header and footer rows. Paged browsers insert footer rows at + the bottom of the current page and header rows at the top of + the new page, followed by the remaining body rows. +--> + +<!ELEMENT TABLE - - (CAPTION?, TR*) -- mixed headers and data --> +<!ATTLIST TABLE + %attrs; + %needs; -- for control of text flow -- + border (border) #IMPLIED -- draw borders -- + colspec CDATA #IMPLIED -- column widths and alignment -- + units (en|pixels|relative) en -- units for column widths -- + dp CDATA #IMPLIED -- decimal point e.g. dp="," -- + width NUMBER #IMPLIED -- absolute or percentage width -- + %block.align; -- horizontal alignment -- + noflow (noflow) #IMPLIED -- noflow around table -- + nowrap (nowrap) #IMPLIED -- don't wrap words -- + > + +<!ENTITY % cell "TH | TD"> +<!ENTITY % horiz.align "left|center|right|justify"> +<!ENTITY % vert.align "top|middle|bottom|baseline"> + +<!-- + Browsers should tolerate an omission of the first <TR> + tag as it is implied by the context. Missing trailing + <TR>s implied by rowspans should be ignored. + + The alignment attributes act as defaults for rows + overriding the colspec attribute and being in turn + overridden by alignment attributes on cell elements. + Use valign=baseline when you want to ensure that text + in different cells on the same row is aligned on the + same baseline regardless of fonts. It only applies + when the cells contain a single line of text. +--> + +<!ELEMENT TR - O (%cell)* -- row container --> +<!ATTLIST TR + %attrs; + align (%horiz.align) #IMPLIED -- horizontal alignment -- + valign (%vert.align) top -- vertical alignment -- + dp CDATA #IMPLIED -- decimal point e.g. dp="," -- + nowrap (nowrap) #IMPLIED -- don't wrap words -- + > + +<!-- + Note that table cells can include nested tables. + Missing cells are considered to be empty, while + missing rows should be ignored, i.e. if a cell + spans a row and there are no further TR elements + then the implied row should be ignored. +--> + +<!ELEMENT (%cell) - O %body.content> +<!ATTLIST (%cell) + %attrs; + colspan NUMBER 1 -- columns spanned -- + rowspan NUMBER 1 -- rows spanned -- + align (%horiz.align) #IMPLIED -- horizontal alignment -- + valign (%vert.align) top -- vertical alignment -- + dp CDATA #IMPLIED -- decimal point e.g. dp="," -- + nowrap (nowrap) #IMPLIED -- don't wrap words -- + axis CDATA #IMPLIED -- axis name, defaults to element content -- + axes CDATA #IMPLIED -- comma separated list of axis names -- + > + +<!--====================== Figures ========================================--> + +<!-- + The element contains text for use in non-graphical displays. Note that + you can use the shape attribute in anchors to specify hotzones on images. + This provides for local processing of pointer clicks and a unified method + for dealing with graphical and non-graphical displays. + + Text is flowed around figures when the figure is left or right aligned. + You can request the browser to move down until there is enough room for + the next element, see the CLEAR and NEED attributes (in %needs) + + Figures offer a path towards embedding arbitrary information formats + via some kind of OLE/OpenDoc mechanism. +--> + +<!ELEMENT FIG - - (OVERLAY*, CAPTION?, FIGTEXT, CREDIT?) -(FIG|IMG)> +<!ATTLIST FIG + %attrs; + %needs; -- for control of text flow -- + src %URI; #REQUIRED -- URI of document to embed -- + %url.link; -- standard link attributes -- + %block.align; -- horizontal alignment -- + noflow (noflow) #IMPLIED -- noflow around figure -- + width NUMBER #IMPLIED -- desired width in units -- + height NUMBER #IMPLIED -- desired height in units -- + units (en|pixels) pixels -- specifies units as en's or pixels -- + imagemap (%URI) #IMPLIED -- pass background clicks to server -- + > + +<!ELEMENT FIGTEXT O O %body.content -- dummy element --> + +<!-- + Figure overlays. When combined with local caching, overlays + provide a cheap way of modifying a larger base image sent as + part of a previous page. +--> + +<!ELEMENT OVERLAY - O EMPTY -- image overlay --> +<!ATTLIST OVERLAY + src %URI; #REQUIRED -- URI of image overlay -- + %url.link; -- standard link attributes -- + units (en|pixels) pixels -- specifies units as en's or pixels -- + x NUMBER 0 -- offset from left in units -- + y NUMBER 0 -- offset from top in units -- + width NUMBER #IMPLIED -- desired width in units -- + height NUMBER #IMPLIED -- desired height in units -- + imagemap (%URI) #IMPLIED -- pass background clicks to server -- + > + +<!ELEMENT CREDIT - - (%text;)* -- source of image --> +<!ATTLIST CREDIT + %attrs; + > + +<!--======================== Notes ========================================--> + +<!-- +The NOTE element is used for admonishments. The CLASS attribute +is used to differentiate NOTE's, e.g. Note, Caution or Warning. +--> + +<!ELEMENT NOTE - - %body.content; -- admonishment --> +<!ATTLIST NOTE + %attrs; + src %URI; #IMPLIED -- URI of custom graphic -- + %url.link; -- standard link attributes -- + %needs; -- for control of text flow -- + > + +<!--======================== Footnotes ====================================--> + +<!-- +Typically rendered as popup note. These elements are referenced +by hypertext links specified with the anchor element. +--> +<!ELEMENT FN - - %body.content;> +<!ATTLIST FN %attrs;> + +<!--======================== Math ========================================--> + +<!-- Use     etc for greater control of spacing. --> + +<!-- Subscripts and Superscripts + + <SUB> and <SUP> are used for subscripts and superscripts. + + i j + X <SUP>i</SUP>Y<SUP>j</SUP> is X Y + + i.e. the space following the X disambiguates the binding. + The align attribute can be used for horizontal alignment, + e.g. to explicitly place an index above an element: + i + X<sup align=center>i</sup> produces X + +Short references are defined for superscripts, subscripts and boxes +to save typing when manually editing HTML math, e.g. + + x^2^ is mapped to x<sup>2</sup> + y_z_ is mapped to y<sub>z</sub> + {a+b} is mapped to <box>a + b</box> + +Note that these only apply within the MATH element and can't be +used in normal text! +--> +<!ENTITY REF1 STARTTAG "SUP"> +<!ENTITY REF2 ENDTAG "SUP"> +<!ENTITY REF3 STARTTAG "SUB"> +<!ENTITY REF4 ENDTAG "SUB"> +<!ENTITY REF5 STARTTAG "BOX"> +<!ENTITY REF6 ENDTAG "BOX"> + +<!USEMAP MAP1 MATH> +<!USEMAP MAP2 SUP> +<!USEMAP MAP3 SUB> +<!USEMAP MAP4 BOX> + +<!SHORTREF MAP1 "^" REF1 + "_" REF3 + "{" REF5 > + +<!SHORTREF MAP2 "^" REF2 + "_" REF3 + "{" REF5 > + +<!SHORTREF MAP3 "_" REF4 + "^" REF1 + "{" REF5 > + +<!SHORTREF MAP4 "}" REF6 + "^" REF1 + "_" REF3 + "{" REF5 > + +<!-- + The inclusion of %math and exclusion of %notmath is used here + to alter the content model for the B, SUB and SUP elements, + to limit them to formulae rather than general text elements. +--> + +<!ENTITY % mathvec "VEC|BAR|DOT|DDOT|HAT|TILDE" -- common accents --> +<!ENTITY % mathface "B|T|BT" -- control of font face --> +<!ENTITY % math "BOX|ABOVE|BELOW|%mathvec|ROOT|SQRT|ARRAY|SUB|SUP|%mathface"> +<!ENTITY % formula "#PCDATA|%math"> + +<!ELEMENT MATH - - (#PCDATA)* -(%notmath) +(%math)> +<!ATTLIST MATH + id ID #IMPLIED + class NAMES #IMPLIED -- e.g. class=chem --> + +<!-- The BOX element acts as brackets. Delimiters are optional and + stretch to match the height of the box. The OVER element is used + when you want a line between numerator and denominator. This line + is suppressed with the alternative ATOP element. CHOOSE acts like + ATOP but adds enclosing round brackets as a convenience for binomial + coefficients. Note the use of { and } as shorthand for <BOX> and + </BOX> respectively: + + 1 + X + {1 + X<OVER>Y} is _______ + Y + + a + b + {a + b<ATOP>c - d} is + c - d + + The delimiters are represented using the LEFT and RIGHT + elements as in: + + {[<LEFT>x + y<RIGHT>]} is [ x + y ] + {(<LEFT>a<RIGHT>]} is (a] + {||<LEFT>a<RIGHT>||} is || a || + + Use { and } for "{" and "}" respectively as + these symbols are used as shorthand for BOX, e.g. + + {{<LEFT>a+b<RIGHT>}} is {a+b} + + You can stretch definite integrals to match the integrand, e.g. + + {∫<SUB>a</SUB><SUP>b</SUP><LEFT>{f(x)<over>1+x} dx} + + b + / f(x) + | ----- dx + / 1 + x + a + + Note the complex content model for BOX is a work around + for the absence of support for infix operators in SGML. + + You can get oversize delimiters with the SIZE attribute, + for example <BOX SIZE=large>(<LEFT>...<RIGHT>)</BOX> + + Note that the names of common functions are recognized + by the parser without the need to use "&" and ";" around + them, e.g. int, sum, sin, cos, tan, ... +--> + +<!ELEMENT BOX - - ((%formula)*, (LEFT, (%formula)*)?, + ((OVER|ATOP|CHOOSE), (%formula)*)?, + (RIGHT, (%formula)*)?)> +<!ATTLIST BOX + size (normal|medium|large|huge) normal -- oversize delims --> + +<!ELEMENT (OVER|ATOP|CHOOSE|LEFT|RIGHT) - O EMPTY> + +<!-- Horizontal line drawn ABOVE contents + The symbol attribute allows authors to supply + an entity name for an accent, arrow symbol etc. + Generalisation of LaTeX's overline command. + + e.g. <above sym=ssmile>x</above> + places an upwardly turning curve above the "x" + --> + +<!ELEMENT ABOVE - - (%formula)+> +<!ATTLIST ABOVE sym ENTITY #IMPLIED> + +<!-- Horizontal line drawn BELOW contents + The symbol attribute allows authors to + supply an entity name for an arrow symbol etc. + Generalisation of LaTeX's underline command. + --> + +<!ELEMENT BELOW - - (%formula)+> +<!ATTLIST BELOW sym ENTITY #IMPLIED> + +<!-- Convenience tags for common accents: + vec, bar, dot, ddot, hat and tilde +--> + +<!ELEMENT (%mathvec) - - (%formula)+> + +<!-- + T and BT are used to designate terms which should + be rendered in an upright font (& bold face for BT) +--> + +<!ELEMENT (T|BT) - - (%formula)+> +<!ATTLIST (T|BT) class NAMES #IMPLIED> + +<!-- Roots e.g. <ROOT>3<OF>1+x</ROOT> --> + +<!ELEMENT ROOT - - ((%formula)+, OF, (%formula)+)> +<!ELEMENT OF - O (%formula)* -- what the root applies to --> + +<!ELEMENT SQRT - - (%formula)* -- square root convenience tag --> + +<!-- LaTeX like arrays. The COLDEF attribute specifies + a single capital letter for each column determining + how the column should be aligned, e.g. coldef="CCC" + + "L" left + "C" center + "R" right + + An optional separator letter can occur between columns + and should be one of + - or =, e.g. "C+C+C+C=C". + Whitespace within coldef is ignored. By default, the + columns are all centered. + + The ALIGN attribute alters the vertical position of the + array as compared with preceding and following expressions. + + Use LDELIM and RDELIM attributes for delimiter entities. + When the LABELS attribute is present, the array is + displayed with the first row and the first column as + labels displaced from the other elements. In this case, + the first element of the first row should normally be + left blank. + + Use &vdots; &cdots; and &ddots; for vertical, horizontal + and diagonal ellipsis dots. Use &dotfill; to fill an array + cell with horizontal dots (e.g. for a full row). + Note &ldots; places the dots on the baseline, while &cdots; + places them higher up. +--> + +<!ELEMENT ARRAY - - (ROW)+> +<!ATTLIST ARRAY + align (top|middle|bottom) middle -- vertical alignment -- + coldef CDATA #IMPLIED -- column alignment and separator -- + ldelim CDATA #IMPLIED -- stretchy left delimiter -- + rdelim CDATA #IMPLIED -- stretchy right delimiter -- + labels (labels) #IMPLIED -- TeX's \bordermatrix style --> + +<!ELEMENT ROW - O (ITEM)*> +<!ELEMENT ITEM - O (%formula)*> +<!ATTLIST ITEM + align CDATA #IMPLIED -- override coldef alignment -- + colspan NUMBER 1 -- merge columns as per TABLE -- + rowspan NUMBER 1 -- merge rows as per TABLE --> + +<!--================ Document Head ========================================--> + +<![ %HTML.Deprecated [ + <!ENTITY % head.content "TITLE & ISINDEX? & BASE? & STYLE? + & META* & LINK* & RANGE* & NEXTID?"> +]]> + +<!ENTITY % head.nextid ""> + +<!ENTITY % head.content "TITLE & ISINDEX? & BASE? & STYLE? + & META* & LINK* & RANGE*"> + +<!ELEMENT HEAD O O (%head.content)> + +<!ELEMENT LINK - O EMPTY> +<!ATTLIST LINK + href %URI #REQUIRED + %linkExtraAttributes; > + +<!ELEMENT RANGE - O EMPTY> +<!ATTLIST RANGE + id ID #IMPLIED -- for naming marked range -- + class NAMES #IMPLIED -- for subclassing -- + from IDREF #REQUIRED -- start of marked range -- + until IDREF #REQUIRED -- end of marked range -- + > + +<!ELEMENT ISINDEX - O EMPTY> +<!ATTLIST ISINDEX + href %URI #IMPLIED -- server handling queries -- + prompt CDATA #IMPLIED -- prompt message --> + +<!-- + The BASE element gives the base URL for + dereferencing relative URLs, e.g. + + <BASE href="http://foo.com/images"> + ... + <IMG SRC="bar.gif"> + + The image is deferenced to + + http://foo.com/images/bar.gif +--> + +<!ELEMENT BASE - O EMPTY> +<!ATTLIST BASE + id ID #IMPLIED + href %URI; #REQUIRED + > + +<![ %HTML.Deprecated [ + <!ELEMENT NEXTID - O EMPTY> + <!ATTLIST NEXTID N CDATA #REQUIRED> +]]> + +<!ELEMENT META - O EMPTY -- Generic Metainformation --> +<!ATTLIST META + http-equiv NAME #IMPLIED -- HTTP response header name -- + name NAME #IMPLIED -- metainformation name -- + content CDATA #REQUIRED -- associated information -- + > + +<!-- + A style sheet can be associated with the document using the + LINK element, e.g. <LINK rel=style href="housestyle.dsssl">. + Style overrides can be placed in the document head using the + STYLE element, e.g. + + <style notation=dsssl-lite> + dsss-lite stuff + </style> + + Later on in the document you can use: + + <h2 class=bigcaps>Header with bigger than normal capitals</h2> + <p class=abstract>A paragraph with a unique style of its own + ... + + Statements in the given style notation + + The tag names, class and id attributes are used in the style sheet + notation to describe how to render matching elements. +--> + +<!ENTITY % style-notations "dsssl-lite | w3c-style"> +<!NOTATION dsssl-lite PUBLIC + "ISO/IEC 10179:1995//NOTATION DSSSL Style Language//EN"> + +<!NOTATION w3c-style PUBLIC "IETF/RFC nnn/W3C Style Language//EN"> + +<!ELEMENT STYLE - O (#PCDATA)> +<!ATTLIST STYLE + notation NOTATION (%style-notations;) #REQUIRED +> + +<!--================ Document Structure ===================================--> + +<!ENTITY % html.content "HEAD, BODY"> + +<!ELEMENT HTML O O (%html.content)> +<!ENTITY % version.attr 'VERSION CDATA #FIXED "&HTML.Version;"'> + +<!-- suggested roles are: TOC, DOC, DOCPART, HITLIST, DIALOG --> + +<!ATTLIST HTML + %version.attr; -- report DTD version to application -- + urn CDATA #IMPLIED -- universal resource name for this document -- + class NAMES #IMPLIED -- role of this document, eg table of contents -- + > + +<!-- The END -->