📄 html.dtd
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%attrs; -- %coreattrs, %i18n, %events --
%align; -- align, text alignment --
%reserved; -- reserved for possible future use --
>
<!ELEMENT CENTER - - (%flow;)* -- shorthand for DIV align=center -->
<!ATTLIST CENTER
%attrs; -- %coreattrs, %i18n, %events --
>
<!--================== The Anchor Element ================================-->
<!ENTITY % Shape "(rect|circle|poly|default)">
<!ENTITY % Coords "CDATA" -- comma-separated list of lengths -->
<!ELEMENT A - - (%inline;)* -(A) -- anchor -->
<!ATTLIST A
%attrs; -- %coreattrs, %i18n, %events --
charset %Charset; #IMPLIED -- char encoding of linked resource --
type %ContentType; #IMPLIED -- advisory content type --
name CDATA #IMPLIED -- named link end --
href %URI; #IMPLIED -- URI for linked resource --
hreflang %LanguageCode; #IMPLIED -- language code --
target %FrameTarget; #IMPLIED -- render in this frame --
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 --
target %FrameTarget; #IMPLIED -- render in this frame --
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 --
target %FrameTarget; #IMPLIED -- render in this frame --
>
<!--=================== 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 -->
<![ %HTML.Frameset; [
<!ENTITY % MultiLengths "CDATA" -- comma-separated list of MultiLength -->
]]>
<!ENTITY % Pixels "CDATA" -- integer representing length in pixels -->
<!ENTITY % IAlign "(top|middle|bottom|left|right)" -- center? -->
<!-- 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) --
name CDATA #IMPLIED -- name of image for scripting --
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 --
align %IAlign; #IMPLIED -- vertical or horizontal alignment --
border %Pixels; #IMPLIED -- link border width --
hspace %Pixels; #IMPLIED -- horizontal gutter --
vspace %Pixels; #IMPLIED -- vertical gutter --
>
<!-- 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 CDATA #IMPLIED -- space-separated list of URIs --
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 --
align %IAlign; #IMPLIED -- vertical or horizontal alignment --
border %Pixels; #IMPLIED -- link border width --
hspace %Pixels; #IMPLIED -- horizontal gutter --
vspace %Pixels; #IMPLIED -- vertical gutter --
%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 --
>
<!--=================== Java APPLET ==================================-->
<!--
One of code or object attributes must be present.
Place PARAM elements before other content.
-->
<!ELEMENT APPLET - - (PARAM | %flow;)* -- Java applet -->
<!ATTLIST APPLET
%coreattrs; -- id, class, style, title --
codebase %URI; #IMPLIED -- optional base URI for applet --
archive CDATA #IMPLIED -- comma-separated archive list --
code CDATA #IMPLIED -- applet class file --
object CDATA #IMPLIED -- serialized applet file --
alt %Text; #IMPLIED -- short description --
name CDATA #IMPLIED -- allows applets to find each other --
width %Length; #REQUIRED -- initial width --
height %Length; #REQUIRED -- initial height --
align %IAlign; #IMPLIED -- vertical or horizontal alignment --
hspace %Pixels; #IMPLIED -- horizontal gutter --
vspace %Pixels; #IMPLIED -- vertical gutter --
>
<!--=================== Horizontal Rule ==================================-->
<!ELEMENT HR - O EMPTY -- horizontal rule -->
<!ATTLIST HR
%attrs; -- %coreattrs, %i18n, %events --
align (left|center|right) #IMPLIED
noshade (noshade) #IMPLIED
size %Pixels; #IMPLIED
width %Length; #IMPLIED
>
<!--=================== Paragraphs =======================================-->
<!ELEMENT P - O (%inline;)* -- paragraph -->
<!ATTLIST P
%attrs; -- %coreattrs, %i18n, %events --
%align; -- align, text alignment --
>
<!--=================== 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 --
%align; -- align, text alignment --
>
<!--=================== Preformatted Text ================================-->
<!-- excludes markup for images and changes in font size -->
<!ENTITY % pre.exclusion "IMG|OBJECT|APPLET|BIG|SMALL|SUB|SUP|FONT|BASEFONT">
<!ELEMENT PRE - - (%inline;)* -(%pre.exclusion;) -- preformatted text -->
<!ATTLIST PRE
%attrs; -- %coreattrs, %i18n, %events --
width NUMBER #IMPLIED
>
<!--===================== 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 - - (%flow;)* -- 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 -->
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