bsp;<span id='identifier'>TPBoolean</span>&nbsp;&nbsp;&nbsp;= ^<span id='identifier'>boolean</span>;<br>
                  <br>
                  &nbsp;&nbsp;<span id='identifier'>TSBoolean</span>&nbsp;&nbsp;&nbsp;= <span id='bold'>set</span>&nbsp;<span id='bold'>of</span>&nbsp;<span id='identifier'>boolean</span>;<br>
                  &nbsp;&nbsp;<span id='identifier'>TPSBoolean</span>&nbsp;&nbsp;= ^<span id='identifier'>TSBoolean</span>;<br>
                  <br>
                  &nbsp;&nbsp;<span id='