\x"</b> [<b>"1"</b>-<b>"9"</b> <b>"a"-<b>"f"</b> <b>"A"</b>-<b>"F"</b>]{0,2}
        |   <b>"\x{"</b> [<b>"1"</b>-<b>"9"</b> <b>"a"-<b>"f"</b> <b>"A"</b>-<b>"F"</b>]* <b>"}"</b>
        |   <b>"\"</b> <i>character</i>
</pre>
</td></tr>
</table>
<p>
A literal is either an ordinary character (a character that has no
other significance in the context), an 8 bit hexadecimal encoded
character (e.g. <tt>\x1B</tt>), a wide hexadecimal encoded character
(e.g. <tt>\x{263a}</tt>), or an escaped character.  An escaped