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 | FORM, 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 | APPLET | CDATA | #IMPLIED | D | L | comma-separated archive list |
| archive | OBJECT | CDATA | #IMPLIED | space-separated list of URIs | ||
| axis | TD, TH | CDATA | #IMPLIED | comma-separated list 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 | TABLE | %Pixels; | #IMPLIED | controls frame width around table | ||
| border | IMG, OBJECT | %Pixels; | #IMPLIED | D | L | link border width |
| 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, DL, MENU, 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, 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 | TD, TH | %Length; | #IMPLIED | D | L | height for cell |
| height | IMG, OBJECT | %Length; | #IMPLIED | override height | ||
| height | APPLET | %Length; | #REQUIRED | D | L | initial height |
| 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 |