Validation Rules:
-----------------
$Id: rules.txt 2 2004-02-29 18:58:13Z schst $

A validation rule is an object that supplies one method
to do a complex validation either for a form element or
the complete form.
patForms will pass the form or element object to the rule.
Rules can be applied before or after the built-in validation.

Rules allow custom validation like
 * check if a two passwords match
or modify forms like:
 * set the 'required' attribute based on the value of an element

$form->addRule( $myRule, PATFORMS_BEFORE_VALIDATION );
$form->addRule( $myRule, PATFORMS_AFTER_VALIDATION, true );
$element->addRule( $myRule, PATFORMS_AFTER_VALIDATION );

boolean addRule( object rule [, integer type = PATFORMS_AFTER_VALIDATION [, boolean revalidate = false]] )

See the examples for more documentation on rules.