| (no notation) | HTML 2.0; should work on all browsers |
| N1.0 | probably works only in Netscape 1.0 and later versions |
|---|---|
| N1.1 | probably works only in Netscape 1.1 and later versions |
| 3.0 | proposed HTML 3.0 tag; may work in some browsers |
| URL | URL of a remote file (or local file name) |
|---|---|
| ? | a decimal number (e.g. <H?> means
<H1>, <H2>, <H3>, etc.) |
| % | a percentage (e.g. <HR WIDTH=%> means
<HR WIDTH=50%>, etc.) |
| *** | text (e.g. ALT="***" means fill in with text) |
| $$$ | a hexadecimal number (e.g. BGCOLOR="#$$$" means
BGCOLOR="#00FF1C", etc.) |
| | | alternatives (e.g. ALIGN=LEFT|RIGHT|CENTER means
pick one of the three) |