| _blank | |
| _content | |
| _parent | |
| _self | |
| _top | |
| absbottom | |
| abscenter | |
| absmiddle | |
| auto | |
| baseline | |
| bottom | |
| button | |
| center | |
| char | |
| checkbox | |
| content | |
| content-primary | |
| content-targetable | |
| file | |
| hidden | |
| image | |
| justify | |
| left | |
| ltr | |
| middle | |
| no | |
| noscroll | |
| off | |
| on | |
| password | |
| radio | |
| reset | |
| right | |
| rtl | |
| scroll | |
| search | |
| submit | |
| tel | |
| text | |
| texttop | |
| top | |
| url | |
| yes |