key property

String? key

The key is a name of one of the Dataset's data columns.

The value of the key (either the label's value or value in the column) must be one of {training, validation, test}, and it defines to which set the given piece of data is assigned. If for a piece of data the key is not present or has an invalid value, that piece is ignored by the pipeline.

Required.

Implementation

core.String? key;