I'm not very comfortable with date namespaces. The chosen format, TAG:DATE-DATE, is both imprecise (no month, no day) and unusable for querying and data processing. Furthermore, we already have start_date:namespace for that.

However, on reflection, the current_situation tag isn't descriptive enough; "latest development" would be clearer. This doesn't preclude using the tags you mentioned, though.

Hi,
Sorry for the delayed response. The building was divided in two in 1968 and both were extended. The southern building has not undergone any changes since then, hence the current situation = 1968. The northern building had an annex demolished in 2023, hence the 2023.