def pif_to_mdf_record(pif_obj, dataset_hit, mdf_acl):
    """Convert a PIF into partial MDF record"""
    res = {}
    res["mdf"] = _to_meta_data(pif_obj, dataset_hit, mdf_acl)
    res[res["mdf"]["source_name"]] = _to_user_defined(pif_obj)
    return dumps(res)