# TimestampMetadata

## class nominal.core.TimestampMetadata(series_name, timestamp_type)

Bases: [`object`](https://docs.python.org/3/builtins/functions.html#object "(in Python v3.15)")

How timestamps in the extractor’s output data are encoded (the timestamp column + its type).

### series_name: str

Name of the column containing timestamp data in the extractor’s output files.

### timestamp_type: Iso8601 | Epoch | Relative | Custom | Literal['iso_8601', 'epoch_picoseconds', 'epoch_nanoseconds', 'epoch_microseconds', 'epoch_milliseconds', 'epoch_seconds', 'epoch_minutes', 'epoch_hours', 'epoch_days']

How timestamps in that column are interpreted.