HTML level 2.0 characters
Characters less than 128
All the normal printable characters, from 32 to 126, are available directly
or as &#xxx;, where xxx is the number of the character. The only
sub-32 characters that are available are 	 (horizontal tab) and
(line feed).
Named entities
There are a four named characters in the HTML 2.0 specification which refer
to characters less than character number 128. These exist because they refer
to characters which have special meaning in HTML markup and which therefore
can't be used directly (note that the closing ';' in necessary):
- & - an ampersand &
- < - a less than sign <
- > - a greater than sign >
- " - a double quotation mark "
Top-bit-set characters
A wide range of top-bit set characters is available in HTML 2.0, which can
be referred to both by number and by name. The numbers are derived from the
same ISO 8859/1 standard as those in RISC OS, so the numbers are the same
as those that you would use with the Alt-key and the numeric keypad. Note
that not all of the characters available in RISC OS are defined in
HTML, though.
Don't use top-bit-set characters directly in HTML. The top bit may be
lost in transmission. Note both that the trailing ';' is necessary, and that
these entities are case-sensitive:
- À or À - À
- Á or Á - Á
-  or  - Â
- à or à - Ã
- Ä or Ä - Ä
- Å or Å - Å
- Æ or Æ - Æ
- Ç or Ç - Ç
- È or È - È
- É or É - É
- Ê or Ê - Ê
- Ë or Ë - Ë
- Ì or Ì - Ì
- Í or Í - Í
- Î or Î - Î
- Ï or Ï - Ï
- Ð or Ð - Ð
- Ñ or Ñ - Ñ
- Ò or Ò - Ò
- Ó or Ó - Ó
- Ô or Ô - Ô
- Õ or Õ - Õ
- Ö or Ö - Ö
- Ø or Ø - Ø
- Ù or Ù - Ù
- Ú or Ú - Ú
- Û or Û - Û
- Ü or Ü - Ü
- Ý or Ý - Ý
- Þ or Þ - Þ
- ß or ß - ß
- à or à - à
- á or á - á
- â or â - â
- ã or ã - ã
- ä or ä - ä
- å or å - å
- æ or æ - æ
- ç or ç - ç
- è or è - è
- é or é - é
- ê or ê - ê
- ë or ë - ë
- ì or ì - ì
- í or í - í
- î or î - î
- ï or ï - ï
- ð or ð - ð
- ñ or ñ - ñ
- ò or ò - ò
- ó or ó - ó
- ô or ô - ô
- õ or õ - õ
- ö or ö - ö
- ø or ø - ø
- ù or ù - ù
- ú or ú - ú
- û or û - û
- ü or ü - ü
- ý or ý - ý
- þ or þ - þ
- ÿ or ÿ - ÿ
In practice, most browsers now understand the range of characters from
number 161 upwards, including £, the pound sign, and ©,
the copyright symbol. However, they are strictly speaking not defined
in the standard.