Legend: Deprecated, Loose DTD, Frameset DTD
| Name | Related Elements | Type | Default | Depr. | DTD | Comment |
|---|---|---|---|---|---|---|
| abbr | TD, TH | %Text; | #IMPLIED | abbreviation for header cell | ||
| accept-charset | FORM | %Charsets; | #IMPLIED | list of supported charsets | ||
| accept | INPUT | %ContentTypes; | #IMPLIED | list of MIME types for file upload | ||
| accesskey | A, AREA, BUTTON, INPUT, LABEL, LEGEND, TEXTAREA | %Character; | #IMPLIED | accessibility key character | ||
| action | FORM | %URI; | #REQUIRED | server-side form handler | ||
| align | CAPTION | %CAlign; | #IMPLIED | D | L | relative to table |
| align | APPLET, IFRAME, IMG, INPUT, OBJECT | %IAlign; | #IMPLIED | D | L | vertical or horizontal alignment |
| align | LEGEND | %LAlign; | #IMPLIED | D | L | relative to fieldset |
| align | TABLE | %TAlign; | #IMPLIED | D | L | table position relative to window |
| align | HR | (left | center | right) | #IMPLIED | D | L | |
| align | DIV, H1, H2, H3, H4, H5, H6, P | (left | center | right | justify) | #IMPLIED | D | L | align, text alignment |
| align | COL, COLGROUP, TBODY, TD, TFOOT, TH, THEAD, TR | (left | center | right | justify | char) | #IMPLIED | |||
| alink | BODY | %Color; | #IMPLIED | D | L | color of selected links |
| alt | APPLET | %Text; | #IMPLIED | D | L | short description |
| alt | AREA, IMG | %Text; | #REQUIRED | short description | ||
| alt | INPUT | CDATA | #IMPLIED | short description | ||
| archive | OBJECT | %URI; | #IMPLIED | space separated archive list | ||
| archive | APPLET | CDATA | #IMPLIED | D | L | comma separated archive list |
| axis | TD, TH | CDATA | #IMPLIED | names groups of related headers | ||
| background | BODY | %URI; | #IMPLIED | D | L | texture tile for document background |
| bgcolor | TABLE | %Color; | #IMPLIED | D | L | background color for cells |
| bgcolor | TR | %Color; | #IMPLIED | D | L | background color for row |
| bgcolor | TD, TH | %Color; | #IMPLIED | D | L | cell background color |
| bgcolor | BODY | %Color; | #IMPLIED | D | L | document background color |
| border | IMG, OBJECT | %Length; | #IMPLIED | D | L | link border width |
| border | TABLE | %Pixels; | #IMPLIED | controls frame width around table | ||
| cellpadding | TABLE | %Length; | #IMPLIED | spacing within cells | ||
| cellspacing | TABLE | %Length; | #IMPLIED | spacing between cells | ||
| char | COL, COLGROUP, TBODY, TD, TFOOT, TH, THEAD, TR | %Character; | #IMPLIED | alignment char, e.g. char=':' | ||
| charoff | COL, COLGROUP, TBODY, TD, TFOOT, TH, THEAD, TR | %Length; | #IMPLIED | offset for alignment char | ||
| charset | A, LINK, SCRIPT | %Charset; | #IMPLIED | char encoding of linked resource | ||
| checked | INPUT | (checked) | #IMPLIED | for radio buttons and check boxes | ||
| cite | BLOCKQUOTE, Q | %URI; | #IMPLIED | URI for source document or msg | ||
| cite | DEL, INS | %URI; | #IMPLIED | info on reason for change | ||
| class | All elements but BASE, BASEFONT, HEAD, HTML, META, PARAM, SCRIPT, STYLE, TITLE | CDATA | #IMPLIED | space separated list of classes | ||
| classid | OBJECT | %URI; | #IMPLIED | identifies an implementation | ||
| clear | BR | (left | all | right | none) | none | D | L | control of text flow |
| code | APPLET | CDATA | #IMPLIED | D | L | applet class file |
| codebase | OBJECT | %URI; | #IMPLIED | base URI for classid, data, archive | ||
| codebase | APPLET | %URI; | #IMPLIED | D | L | optional base URI for applet |
| codetype | OBJECT | %ContentType; | #IMPLIED | content type for code | ||
| color | BASEFONT, FONT | %Color; | #IMPLIED | D | L | text color |
| cols | FRAMESET | %MultiLengths; | #IMPLIED | F | list of lengths, default: 100% (1 col) | |
| cols | TEXTAREA | NUMBER | #REQUIRED | |||
| colspan | TD, TH | NUMBER | 1 | number of cols spanned by cell | ||
| compact | DIR, MENU | (compact) | #IMPLIED | D | L | |
| compact | DL, OL, UL | (compact) | #IMPLIED | D | L | reduced interitem spacing |
| content | META | CDATA | #REQUIRED | associated information | ||
| coords | AREA | %Coords; | #IMPLIED | comma separated list of lengths | ||
| coords | A | %Coords; | #IMPLIED | for use with client-side image maps | ||
| data | OBJECT | %URI; | #IMPLIED | reference to object's data | ||
| datetime | DEL, INS | %Datetime; | #IMPLIED | date and time of change | ||
| declare | OBJECT | (declare) | #IMPLIED | declare but don't instantiate flag | ||
| defer | SCRIPT | (defer) | #IMPLIED | UA may defer execution of script | ||
| dir | All elements but APPLET, BASE, BASEFONT, BDO, BR, FRAME, FRAMESET, HR, IFRAME, PARAM, SCRIPT | (ltr | rtl) | #IMPLIED | direction for weak/neutral text | ||
| dir | BDO | (ltr | rtl) | #REQUIRED | directionality | ||
| disabled | BUTTON, INPUT, OPTGROUP, OPTION, SELECT, TEXTAREA | (disabled) | #IMPLIED | unavailable in this context | ||
| enctype | FORM | %ContentType; | "application/x-www- form-urlencoded" | |||
| face | BASEFONT, FONT | CDATA | #IMPLIED | D | L | comma separated list of font names |
| for | LABEL | IDREF | #IMPLIED | matches field ID value | ||
| frame | TABLE | %TFrame; | #IMPLIED | which parts of frame to render | ||
| frameborder | FRAME, IFRAME | (1 | 0) | 1 | F | request frame borders? | |
| headers | TD, TH | IDREFS | #IMPLIED | list of id's for header cells | ||
| height | IFRAME | %Length; | #IMPLIED | L | frame height | |
| height | IMG, OBJECT | %Length; | #IMPLIED | override height | ||
| height | APPLET | %Length; | #REQUIRED | D | L | initial height |
| height | TD, TH | %Pixels; | #IMPLIED | D | L | height for cell |
| href | A, AREA, LINK | %URI; | #IMPLIED | URI for linked resource | ||
| href | BASE | %URI; | #IMPLIED | URI that acts as base URI | ||
| hreflang | A, LINK | %LanguageCode; | #IMPLIED | language code | ||
| hspace | APPLET, IMG, OBJECT | %Pixels; | #IMPLIED | D | L | horizontal gutter |
| http-equiv | META | NAME | #IMPLIED | HTTP response header name | ||
| id | All elements but BASE, HEAD, HTML, META, SCRIPT, STYLE, TITLE | ID | #IMPLIED | document-wide unique id | ||
| ismap | IMG | (ismap) | #IMPLIED | use server-side image map | ||
| label | OPTION | %Text; | #IMPLIED | for use in hierarchical menus | ||
| label | OPTGROUP | %Text; | #REQUIRED | for use in hierarchical menus | ||
| lang | All elements but APPLET, BASE, BASEFONT, BR, FRAME, FRAMESET, HR, IFRAME, PARAM, SCRIPT | %LanguageCode; | #IMPLIED | language code | ||
| language | SCRIPT | CDATA | #IMPLIED | D | L | predefined script language name |
| link | BODY | %Color; | #IMPLIED | D | L | color of links |
| longdesc | IMG | %URI; | #IMPLIED | link to long description (complements alt) | ||
| longdesc | FRAME, IFRAME | %URI; | #IMPLIED | F | link to long description (complements title) | |
| marginheight | FRAME, IFRAME | %Pixels; | #IMPLIED | F | margin height in pixels | |
| marginwidth | FRAME, IFRAME | %Pixels; | #IMPLIED | F | margin widths in pixels | |
| maxlength | INPUT | NUMBER | #IMPLIED | max chars for text fields | ||
| media | STYLE | %MediaDesc; | #IMPLIED | designed for use with these media | ||
| media | LINK | %MediaDesc; | #IMPLIED | for rendering on these media | ||
| method | FORM | (GET | POST) | GET | HTTP method used to submit the form | ||
| multiple | SELECT | (multiple) | #IMPLIED | default is single selection | ||
| name | BUTTON, TEXTAREA | CDATA | #IMPLIED | |||
| name | APPLET | CDATA | #IMPLIED | D | L | allows applets to find each other |
| name | SELECT | CDATA | #IMPLIED | field name | ||
| name | FRAME, IFRAME | CDATA | #IMPLIED | F | name of frame for targetting | |
| name | A | CDATA | #IMPLIED | named link end | ||
| name | INPUT, OBJECT | CDATA | #IMPLIED | submit as part of form | ||
| name | MAP | CDATA | #REQUIRED | for reference by usemap | ||
| name | PARAM | CDATA | #REQUIRED | property name | ||
| name | META | NAME | #IMPLIED | metainformation name | ||
| nohref | AREA | (nohref) | #IMPLIED | this region has no action | ||
| noresize | FRAME | (noresize) | #IMPLIED | F | allow users to resize frames? | |
| noshade | HR | (noshade) | #IMPLIED | D | L | |
| nowrap | TD, TH | (nowrap) | #IMPLIED | D | L | suppress word wrap |
| object | APPLET | CDATA | #IMPLIED | D | L | serialized applet file |
| onblur | A, AREA, BUTTON, INPUT, LABEL, SELECT, TEXTAREA | %Script; | #IMPLIED | the element lost the focus | ||
| onchange | INPUT, SELECT, TEXTAREA | %Script; | #IMPLIED | the element value was changed | ||
| onclick | All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE | %Script; | #IMPLIED | a pointer button was clicked | ||
| ondblclick | All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE | %Script; | #IMPLIED | a pointer button was double clicked | ||
| onfocus | A, AREA, BUTTON, INPUT, LABEL, SELECT, TEXTAREA | %Script; | #IMPLIED | the element got the focus | ||
| onkeydown | All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE | %Script; | #IMPLIED | a key was pressed down | ||
| onkeypress | All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE | %Script; | #IMPLIED | a key was pressed and released | ||
| onkeyup | All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE | %Script; | #IMPLIED | a key was released | ||
| onload | FRAMESET | %Script; | #IMPLIED | F | all the frames have been loaded | |
| onload | BODY | %Script; | #IMPLIED | the document has been loaded | ||
| onmousedown | All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE | %Script; | #IMPLIED | a pointer button was pressed down | ||
| onmousemove | All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE | %Script; | #IMPLIED | a pointer was moved within | ||
| onmouseout | All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE | %Script; | #IMPLIED | a pointer was moved away | ||
| onmouseover | All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE | %Script; | #IMPLIED | a pointer was moved onto | ||
| onmouseup | All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE | %Script; | #IMPLIED | a pointer button was released | ||
| onreset | FORM | %Script; | #IMPLIED | the form was reset | ||
| onselect | INPUT, TEXTAREA | %Script; | #IMPLIED | some text was selected | ||
| onsubmit | FORM | %Script; | #IMPLIED | the form was submitted | ||
| onunload | FRAMESET | %Script; | #IMPLIED | F | all the frames have been removed | |
| onunload | BODY | %Script; | #IMPLIED | the document has been removed | ||
| profile | HEAD | %URI; | #IMPLIED | named dictionary of meta info | ||
| prompt | ISINDEX | %Text; | #IMPLIED | D | L | prompt message |
| readonly | TEXTAREA | (readonly) | #IMPLIED | |||
| readonly | INPUT | (readonly) | #IMPLIED | for text and passwd | ||
| rel | A, LINK | %LinkTypes; | #IMPLIED | forward link types | ||
| rev | A, LINK | %LinkTypes; | #IMPLIED | reverse link types | ||
| rows | FRAMESET | %MultiLengths; | #IMPLIED | F | list of lengths, default: 100% (1 row) | |
| rows | TEXTAREA | NUMBER | #REQUIRED | |||
| rowspan | TD, TH | NUMBER | 1 | number of rows spanned by cell | ||
| rules | TABLE | %TRules; | #IMPLIED | rulings between rows and cols | ||
| scheme | META | CDATA | #IMPLIED | select form of content | ||
| scope | TD, TH | %Scope; | #IMPLIED | scope covered by header cells | ||
| scrolling | FRAME, IFRAME | (yes | no | auto) | auto | F | scrollbar or none | |
| selected | OPTION | (selected) | #IMPLIED | |||
| shape | AREA | %Shape; | rect | controls interpretation of coords | ||
| shape | A | %Shape; | rect | for use with client-side image maps | ||
| size | HR | %Pixels; | #IMPLIED | D | L | |
| size | FONT | CDATA | #IMPLIED | D | L | [+|-]nn e.g. size="+1", size="4" |
| size | INPUT | CDATA | #IMPLIED | specific to each type of field | ||
| size | BASEFONT | CDATA | #REQUIRED | D | L | base font size for FONT elements |
| size | SELECT | NUMBER | #IMPLIED | rows visible | ||
| span | COL | NUMBER | 1 | COL attributes affect N columns | ||
| span | COLGROUP | NUMBER | 1 | default number of columns in group | ||
| src | SCRIPT | %URI; | #IMPLIED | URI for an external script | ||
| src | INPUT | %URI; | #IMPLIED | for fields with images | ||
| src | FRAME, IFRAME | %URI; | #IMPLIED | F | source of frame content | |
| src | IMG | %URI; | #REQUIRED | URI of image to embed | ||
| standby | OBJECT | %Text; | #IMPLIED | message to show while loading | ||
| start | OL | NUMBER | #IMPLIED | D | L | starting sequence number |
| style | All elements but BASE, BASEFONT, HEAD, HTML, META, PARAM, SCRIPT, STYLE, TITLE | %StyleSheet; | #IMPLIED | associated style info | ||
| summary | TABLE | %Text; | #IMPLIED | purpose/structure for speech output | ||
| tabindex | A, AREA, BUTTON, INPUT, OBJECT, SELECT, TEXTAREA | NUMBER | #IMPLIED | position in tabbing order | ||
| target | A, AREA, BASE, FORM, LINK | %FrameTarget; | #IMPLIED | L | render in this frame | |
| text | BODY | %Color; | #IMPLIED | D | L | document text color |
| title | STYLE | %Text; | #IMPLIED | advisory title | ||
| title | All elements but BASE, BASEFONT, HEAD, HTML, META, PARAM, SCRIPT, STYLE, TITLE | %Text; | #IMPLIED | advisory title/amplification | ||
| type | A, LINK | %ContentType; | #IMPLIED | advisory content type | ||
| type | OBJECT | %ContentType; | #IMPLIED | content type for data | ||
| type | PARAM | %ContentType; | #IMPLIED | content type for value when valuetype=ref | ||
| type | SCRIPT | %ContentType; | #REQUIRED | content type of script language | ||
| type | STYLE | %ContentType; | #REQUIRED | content type of style language | ||
| type | INPUT | %InputType; | TEXT | what kind of widget is needed | ||
| type | LI | %LIStyle; | #IMPLIED | D | L | list item style |
| type | OL | %OLStyle; | #IMPLIED | D | L | numbering style |
| type | UL | %ULStyle; | #IMPLIED | D | L | bullet style |
| type | BUTTON | (button | submit | reset) | submit | for use as form button | ||
| usemap | IMG, INPUT, OBJECT | %URI; | #IMPLIED | use client-side image map | ||
| valign | COL, COLGROUP, TBODY, TD, TFOOT, TH, THEAD, TR | (top | middle | bottom | baseline) | #IMPLIED | vertical alignment in cells | ||
| value | OPTION | CDATA | #IMPLIED | defaults to element content | ||
| value | PARAM | CDATA | #IMPLIED | property value | ||
| value | INPUT | CDATA | #IMPLIED | required for radio and checkboxes | ||
| value | BUTTON | CDATA | #IMPLIED | sent to server when submitted | ||
| value | LI | NUMBER | #IMPLIED | D | L | reset sequence number |
| valuetype | PARAM | (DATA | REF | OBJECT) | DATA | How to interpret value | ||
| version | HTML | CDATA | %HTML.Version; | D | L | Constant |
| vlink | BODY | %Color; | #IMPLIED | D | L | color of visited links |
| vspace | APPLET, IMG, OBJECT | %Pixels; | #IMPLIED | D | L | vertical gutter |
| width | HR | %Length; | #IMPLIED | D | L | |
| width | IFRAME | %Length; | #IMPLIED | L | frame width | |
| width | IMG, OBJECT | %Length; | #IMPLIED | override width | ||
| width | TABLE | %Length; | #IMPLIED | table width | ||
| width | APPLET | %Length; | #REQUIRED | D | L | initial width |
| width | COL | %MultiLength; | #IMPLIED | column width specification | ||
| width | COLGROUP | %MultiLength; | #IMPLIED | default width for enclosed COLs | ||
| width | TD, TH | %Pixels; | #IMPLIED | D | L | width for cell |
| width | PRE | NUMBER | #IMPLIED | D | L |