type

DataPointValue

One value of a data point, together with the key that says which part of the series it belongs to.

Felder

key: String!: Identifies the value part of the series this value belongs to, for example jahr or monat.

The key is stable across releases and identical for every data point of the series; it is the key of the matching entry in Series.valueParts. It is a technical identifier meant for lookup, not a display name, and is therefore not translated.
value: Decimal!: The number that applies for the requested combination of validOn and knownOn, for example 47460 for the annual reference value valid from 2026-01-01.

The unit belongs to the value part named by key and is a property of the series, not of the individual value, which is why it is not repeated here: read it from Series.valueParts, matching on key.