new ezcInputFormDefinitionElement( ezcInputFormDefinitionElement::REQUIRED, 'float' ),
        'test2' => new ezcInputFormDefinitionElement( ezcInputFormDefinitionElement::OPTIONAL, 'float' ),
    );
    $form = new ezcInputForm( INPUT_POST, $def );

    echo "Valid properties:\n";
    var_dump( $form->getValidProperties() );

    echo "Required properties:\n";
    var_dump( $form->getRequiredProperties() );

    echo "Optional properties:\n";
    var_dump( $form->getOptionalProperties() );

    echo "isValid:\n";
    var_dump( $form->isValid() );

    echo "Values:\n";
    var_dump( $form->test1 );
    var_dump( $form->test2 );
?>