def get_refered_attribute(o_attr):
    '''
    Get the the referred attribute.
    '''
    o_attr_ref = nav_one(o_attr).O_RATTR[106].O_BATTR[113].O_ATTR[106]()
    if o_attr_ref:
        return get_refered_attribute(o_attr_ref)
    else:
        return o_attr
Get the the referred attribute.