== <boolean> ==

A boolean object represents a true/false value:

[[rpimage(zoo_boolean.gif)]]
{{{
  <boolean id="iimodel">
    <about>
      <label>Impact Ionization Model</label>
      <description>Used to enable/disable the effects of impact ionization on the mobility model.</description>
    </about>
    <default>yes</default>
  </boolean>
}}}

You can see working code in the [browser:trunk/examples/zoo zoo of examples] in the [browser:trunk/examples/zoo/boolean boolean example] or on the hub in the directory /apps/rappture/examples/zoo/boolean.