Following the rest of documentation we assume that the time period for a year is "A". But in this [docs ](https://sdmx-twg.github.io/vtl/v2.2/reference_manual/operators/Time%20operators/Add%20time%20unit%20to%20date/index.html#examples-of-valid-syntaxes)we see that uses "Y"
Following the rest of documentation we assume that the time period for a year is "A". But in this docs we see that uses "Y"