def parse_controldesc(controldesc):
    """ Parse a control description.

    Parameters
    ----------
    controldesc: str (mandatory)
        the description plug we want to load 'node.plug'

    Returns
    -------
    box_name: string
        the box name.
    control_name: string
        the associated control name.
    """
    dot = controldesc.find('.')
    if dot < 0:
        box_name = ''
        control_name = controldesc
    else:
        box_name = controldesc[:dot]
        control_name = controldesc[dot + 1:]
    return box_name, control_name
