📄 html-4strict.dtd
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type %ContentType; #IMPLIED -- advisory content type -- name CDATA #IMPLIED -- named link end -- href %URI; #IMPLIED -- URI for linked resource -- hreflang %LanguageCode; #IMPLIED -- language code -- rel %LinkTypes; #IMPLIED -- forward link types -- rev %LinkTypes; #IMPLIED -- reverse link types -- accesskey %Character; #IMPLIED -- accessibility key character -- shape %Shape; rect -- for use with client-side image maps -- coords %Coords; #IMPLIED -- for use with client-side image maps -- tabindex NUMBER #IMPLIED -- position in tabbing order -- onfocus %Script; #IMPLIED -- the element got the focus -- onblur %Script; #IMPLIED -- the element lost the focus -- ><!--================== Client-side image maps ============================--><!-- These can be placed in the same document or grouped in a separate document although this isn't yet widely supported --><!ELEMENT MAP - - ((%block;)+ | AREA+) -- client-side image map --><!ATTLIST MAP %attrs; -- %coreattrs, %i18n, %events -- name CDATA #REQUIRED -- for reference by usemap -- ><!ELEMENT AREA - O EMPTY -- client-side image map area --><!ATTLIST AREA %attrs; -- %coreattrs, %i18n, %events -- shape %Shape; rect -- controls interpretation of coords -- coords %Coords; #IMPLIED -- comma separated list of lengths -- href %URI; #IMPLIED -- URI for linked resource -- nohref (nohref) #IMPLIED -- this region has no action -- alt %Text; #REQUIRED -- short description -- tabindex NUMBER #IMPLIED -- position in tabbing order -- accesskey %Character; #IMPLIED -- accessibility key character -- onfocus %Script; #IMPLIED -- the element got the focus -- onblur %Script; #IMPLIED -- the element lost the focus -- ><!--================== The LINK Element ==================================--><!-- Relationship values can be used in principle: a) for document specific toolbars/menus when used with the LINK element in document head e.g. start, contents, previous, next, index, end, help b) to link to a separate style sheet (rel=stylesheet) c) to make a link to a script (rel=script) d) by stylesheets to control how collections of html nodes are rendered into printed documents e) to make a link to a printable version of this document e.g. a postscript or pdf version (rel=alternate media=print)--><!ELEMENT LINK - O EMPTY -- a media-independent link --><!ATTLIST LINK %attrs; -- %coreattrs, %i18n, %events -- charset %Charset; #IMPLIED -- char encoding of linked resource -- href %URI; #IMPLIED -- URI for linked resource -- hreflang %LanguageCode; #IMPLIED -- language code -- type %ContentType; #IMPLIED -- advisory content type -- rel %LinkTypes; #IMPLIED -- forward link types -- rev %LinkTypes; #IMPLIED -- reverse link types -- media %MediaDesc; #IMPLIED -- for rendering on these media -- ><!--=================== Images ===========================================--><!-- Length defined in strict DTD for cellpadding/cellspacing --><!ENTITY % Length "CDATA" -- nn for pixels or nn% for percentage length --><!ENTITY % MultiLength "CDATA" -- pixel, percentage, or relative --><!ENTITY % MultiLengths "CDATA" -- comma-separated list of MultiLength --><!ENTITY % Pixels "CDATA" -- integer representing length in pixels --><!-- To avoid problems with text-only UAs as well as to make image content understandable and navigable to users of non-visual UAs, you need to provide a description with ALT, and avoid server-side image maps --><!ELEMENT IMG - O EMPTY -- Embedded image --><!ATTLIST IMG %attrs; -- %coreattrs, %i18n, %events -- src %URI; #REQUIRED -- URI of image to embed -- alt %Text; #REQUIRED -- short description -- longdesc %URI; #IMPLIED -- link to long description (complements alt) -- height %Length; #IMPLIED -- override height -- width %Length; #IMPLIED -- override width -- usemap %URI; #IMPLIED -- use client-side image map -- ismap (ismap) #IMPLIED -- use server-side image map -- ><!-- USEMAP points to a MAP element which may be in this document or an external document, although the latter is not widely supported --><!--==================== OBJECT ======================================--><!-- OBJECT is used to embed objects as part of HTML pages PARAM elements should precede other content. SGML mixed content model technicality precludes specifying this formally ...--><!ELEMENT OBJECT - - (PARAM | %flow;)* -- generic embedded object --><!ATTLIST OBJECT %attrs; -- %coreattrs, %i18n, %events -- declare (declare) #IMPLIED -- declare but don't instantiate flag -- classid %URI; #IMPLIED -- identifies an implementation -- codebase %URI; #IMPLIED -- base URI for classid, data, archive-- data %URI; #IMPLIED -- reference to object's data -- type %ContentType; #IMPLIED -- content type for data -- codetype %ContentType; #IMPLIED -- content type for code -- archive %URI; #IMPLIED -- space separated archive list -- standby %Text; #IMPLIED -- message to show while loading -- height %Length; #IMPLIED -- override height -- width %Length; #IMPLIED -- override width -- usemap %URI; #IMPLIED -- use client-side image map -- name CDATA #IMPLIED -- submit as part of form -- tabindex NUMBER #IMPLIED -- position in tabbing order -- %reserved; -- reserved for possible future use -- ><!ELEMENT PARAM - O EMPTY -- named property value --><!ATTLIST PARAM id ID #IMPLIED -- document-wide unique id -- name CDATA #REQUIRED -- property name -- value CDATA #IMPLIED -- property value -- valuetype (DATA|REF|OBJECT) DATA -- How to interpret value -- type %ContentType; #IMPLIED -- content type for value when valuetype=ref -- ><!--=================== Horizontal Rule ==================================--><!ELEMENT HR - O EMPTY -- horizontal rule --><!ATTLIST HR %coreattrs; -- id, class, style, title -- %events; ><!--=================== Paragraphs =======================================--><!ELEMENT P - O (%inline;)* -- paragraph --><!ATTLIST P %attrs; -- %coreattrs, %i18n, %events -- ><!--=================== Headings =========================================--><!-- There are six levels of headings from H1 (the most important) to H6 (the least important).--><!ELEMENT (%heading;) - - (%inline;)* -- heading --><!ATTLIST (%heading;) %attrs; -- %coreattrs, %i18n, %events -- ><!--=================== Preformatted Text ================================--><!-- excludes markup for images and changes in font size --><!ENTITY % pre.exclusion "IMG|OBJECT|BIG|SMALL|SUB|SUP"><!ELEMENT PRE - - (%inline;)* -(%pre.exclusion;) -- preformatted text --><!ATTLIST PRE %attrs; -- %coreattrs, %i18n, %events -- ><!--===================== Inline Quotes ==================================--><!ELEMENT Q - - (%inline;)* -- short inline quotation --><!ATTLIST Q %attrs; -- %coreattrs, %i18n, %events -- cite %URI; #IMPLIED -- URI for source document or msg -- ><!--=================== Block-like Quotes ================================--><!ELEMENT BLOCKQUOTE - - (%block;|SCRIPT)+ -- long quotation --><!ATTLIST BLOCKQUOTE %attrs; -- %coreattrs, %i18n, %events -- cite %URI; #IMPLIED -- URI for source document or msg -- ><!--=================== Inserted/Deleted Text ============================--><!-- INS/DEL are handled by inclusion on BODY --><!ELEMENT (INS|DEL) - - (%flow;)* -- inserted text, deleted text --><!ATTLIST (INS|DEL) %attrs; -- %coreattrs, %i18n, %events -- cite %URI; #IMPLIED -- info on reason for change -- datetime %Datetime; #IMPLIED -- date and time of change -- ><!--=================== Lists ============================================--><!-- definition lists - DT for term, DD for its definition --><!ELEMENT DL - - (DT|DD)+ -- definition list --><!ATTLIST DL %attrs; -- %coreattrs, %i18n, %events -- ><!ELEMENT DT - O (%inline;)* -- definition term --><!ELEMENT DD - O (%flow;)* -- definition description --><!ATTLIST (DT|DD) %attrs; -- %coreattrs, %i18n, %events -- ><!ELEMENT OL - - (LI)+ -- ordered list --><!ATTLIST OL %attrs; -- %coreattrs, %i18n, %events -- ><!-- Unordered Lists (UL) bullet styles --><!ELEMENT UL - - (LI)+ -- unordered list --><!ATTLIST UL %attrs; -- %coreattrs, %i18n, %events -- ><!ELEMENT LI - O (%flow;)* -- list item --><!ATTLIST LI %attrs; -- %coreattrs, %i18n, %events -- ><!--================ Forms ===============================================--><!ELEMENT FORM - - (%block;|SCRIPT)+ -(FORM) -- interactive form --><!ATTLIST FORM %attrs; -- %coreattrs, %i18n, %events -- action %URI; #REQUIRED -- server-side form handler -- method (GET|POST) GET -- HTTP method used to submit the form-- enctype %ContentType; "application/x-www-form-urlencoded" onsubmit %Script; #IMPLIED -- the form was submitted -- onreset %Script; #IMPLIED -- the form was reset -- accept-charset %Charsets; #IMPLIED -- list of supported charsets -- ><!-- Each label must not contain more than ONE field --><!ELEMENT LABEL - - (%inline;)* -(LABEL) -- form field label text --><!ATTLIST LABEL %attrs; -- %coreattrs, %i18n, %events -- for IDREF #IMPLIED -- matches field ID value -- accesskey %Character; #IMPLIED -- accessibility key character -- onfocus %Script; #IMPLIED -- the element got the focus -- onblur %Script; #IMPLIED -- the element lost the focus -- ><!ENTITY % InputType "(TEXT | PASSWORD | CHECKBOX | RADIO | SUBMIT | RESET | FILE | HIDDEN | IMAGE | BUTTON)" ><!-- attribute name required for all but submit & reset --><!ELEMENT INPUT - O EMPTY -- form control --><!ATTLIST INPUT %attrs; -- %coreattrs, %i18n, %events -- type %InputType; TEXT -- what kind of widget is needed -- name CDATA #IMPLIED -- submit as part of form -- value CDATA #IMPLIED -- required for radio and checkboxes -- checked (checked) #IMPLIED -- for radio buttons and check boxes -- disabled (disabled) #IMPLIED -- unavailable in this context -- readonly (readonly) #IMPLIED -- for text and passwd -- size CDATA #IMPLIED -- specific to each type of field -- maxlength NUMBER #IMPLIED -- max chars for text fields -- src %URI; #IMPLIED -- for fields with images -- alt CDATA #IMPLIED -- short description -- usemap %URI; #IMPLIED -- use client-side image map -- tabindex NUMBER #IMPLIED -- position in tabbing order -- accesskey %Character; #IMPLIED -- accessibility key character -- onfocus %Script; #IMPLIED -- the element got the focus -- onblur %Script; #IMPLIED -- the element lost the focus -- onselect %Script; #IMPLIED -- some text was selected -- onchange %Script; #IMPLIED -- the element value was changed -- accept %ContentTypes; #IMPLIED -- list of MIME types for file upload -- %reserved; -- reserved for possible future use -- ><!ELEMENT SELECT - - (OPTGROUP|OPTION)+ -- option selector --><!ATTLIST SELECT %attrs; -- %coreattrs, %i18n, %events --⌨️ 快捷键说明
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