st, the left and right bracket characters are modified to be
<a href="http://www.lispworks.com/documentation/HyperSpec/Body/02_b.htm">terminating macro characters</a>. A form like

<pre>
[IsSubclassOf type other-type]
</pre>

is read as follows: Directly following the left bracket should be a
symbol (<code>IsSubclassOf</code> in this example) which is read as if the standard
readtable was used (except for the special role of the brackets) but
<em>with case preserved</em>. The rest (<code>type other-type</co