====== DomainRule ======

Input validation rule that tests for a valid domain name.  Things like proper characters, double-hyphens, starting with periods, double periods, etc. are tested for.

===== Example =====

<code php>
$form->addRule (new DomainRule ('fieldName'));
</code>

This example checks that the value in the field name "fieldName" is a valid domain name.

===== Additional Information =====

  * [[DNSDomainRule]]
  * [[wact:api:validation:rule:catalog|Validation Rules]]
  * WACT [[wact:Form Validation]]