# cn2

The pointer to the Curve Number database file is a foreign key referencing [name](https://swatplus.gitbook.io/io-docs/introduction-1/landuse-and-management/cntable.lum/name_cn) in [**cntable.lum**](https://swatplus.gitbook.io/io-docs/introduction-1/landuse-and-management/cntable.lum).