  *  within a set of mutually exclusive choices.
  *  A RadioButton group is composed of two or more RadioButton controls
  *  with the same <code>groupName</code> property.
- *  The RadioButton group can refer to a group created by the
- *  <code>&lt;mx:RadioButtonGroup&gt;</code> tag.
+ *  While grouping RadioButton instances in a RadioButtonGroup is optional,
+ *  a group lets you do things like set a single event handler on a group of buttons,
+ *  rather than on each individual button.
+ *
+ *  <p>The RadioButton group can refer to a group created by the
+ *  <code>&lt;s:RadioButtonGroup&gt;</code> tag.
  *  The user selects only one member of the group at a time.
  *  Selecting an unselected group member deselects the currently selected
- *  RadioButton control within that group.
+ *  RadioButton control within that group.</p>
  *
  *  <p>The RadioButton control has the following default characteristics:</p>
  *     <table class="innertable">

    /**
     *  The RadioButtonGroup object to which this RadioButton belongs.
     *  When creating radio buttons to put in a RadioButtonGroup, it is 
     *  advisable to use group for all of the buttons or groupName for all of 
     *  the buttons. The groupName will be set to the generated name of the 
     *  RadioButtonGroup object.
     *  
     *  @default the default RadioButtonGroup

 *        </tr>
 *        <tr>
 *           <td>Minimum size</td>
 *           <td>18 pixels wide and 18 pixels high</td>
 *        </tr>
 *        <tr>
 *           <td>Maximum size</td>
 *           <td>10000 pixels wide and 10000 pixels high</td>
 *        </tr>
 *     </table>
 *
 *  @mxml
 *
 *  <p>The <code>&lt;s:RadioButton&gt;</code> tag inherits all of the tag
 *  attributes of its superclass, and adds the following tag attributes:</p>
 *
 *  <pre>
 *  &lt;s:RadioButton
 *    <strong>Properties</strong>
 *    group=""
 *    groupName="RadioButtonGroup_<i>n</i>"
 *    selected=""
 *    value="null"
 *  /&gt;
 *  </pre>
 *
 *  @see spark.components.RadioButtonGroup
 *  @see spark.components.RadioButtonGroup
 *  @see spark.skins.spark.RadioButtonSkin
 *  @langversion 3.0
 *  @playerversion Flash 10
 *  @playerversion AIR 1.5
