## add_sdmx_reference_cols()


Add SDMX reference columns to a DataFrame.


Usage

``` python
add_sdmx_reference_cols(
    df,
    dsd,
    structure="datastructure",
    action="I",
)
```


> **Warning: Deprecated since version Use**
>
> [standardize_output()](standardize_output.md#tidysdmx.standardize_output) instead.


## Parameters


`df: pd.DataFrame`  
The input DataFrame to which the columns will be added.

`dsd: str`  
The Data Structure Definition (DSD) identifier.

`structure: str = ``"datastructure"`  
The structure type. Default is `'datastructure'`.

`action: str = ``"I"`  
The action type. Default is `'I'` (Insert).


## Returns


`pd.DataFrame`  
The DataFrame with the added SDMX reference columns.