gistfile1.txt

form:
    LAYOUT METHOD ACTION 
    ATTRIB=VALUE ATTRIB2=VALUE2

group: 
    LEGEND
    ATTRIB=VALUE
    FIELD1:
        TYPE LABEL
        VALIDATION1 VALIDATION2 VALIDATION3


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Resulting array should be:
    public $base_form = array(
        'layout' => 'LAYOUT',
        'method' => 'METHOD',
        'action' => 'ACTION',
        'attrib' => array(
            'ATTRIB'  => 'VALUE',
            'ATTRIB2' => 'VALUE2'
        ),
        'groups' => array(
            array(
                'legend' => 'LEGEND',
                'attrib' => array(
                    'ATTRIB' => 'VALUE'
                ),
                'fields' => array(
                    'FIELD1' => array(
                        'name' => 'FIELD1',
                        'type' => 'TYPE',
                        'label' =>'LABEL',
                        'validations' => array(
                            'VALIDATION1',
                            'VALIDATION2',
                            'VALIDATION3'
                        )
                    )
                )
            )
        )
    );