# Update unit labels

## Summary
Update unit labels of one or more BaseData elements (no conversion).

## Metadata
- **Module ID:** UnitsLabelUpdate
- **Module path:** /home/runner/work/MoDaCor/MoDaCor/src/modacor/modules/base_modules/units_label_update.py
- **Module version:** 20251216.1
- **Keywords:** units, update, standardize

## Required data keys
- 

## Modifies
- ****: units

## Required arguments
- update_pairs

## Default configuration
```json
{
  "update_pairs": {}
}
```

## Argument specification
| Argument | Type | Required | Default | Description |
|---|---|---|---|---|
| `update_pairs` | dict | Yes | {} | Mapping of BaseData key to unit string or {'units': str}. |

## References
DOI 10.1088/0953-8984/25/38/383201