Discussed in https://git.nomics.world/dbnomics-fetchers/management/issues/156#note_8163 There exist characteristics of a series that are described by dimensions by that have only one value. This information is useful to understand a series but are useless as facet. ## Acceptation criteria - [X] It needs to be added to the data model in order to be usable by new fetchers - [ ] Series attributes MUST be returned by the API - [ ] Series attributes MUST be displayed in the UI but not be used as facet - [ ] Series attributes MUST be available as DataFrame columns in Python client ## Questions - What about R client? ## Examples - dbnomics-fetchers/management#445 `IMF/IFS/A.7A.HPU_XDR`: [website](https://db.nomics.world/IMF/IFS/A.7A.HPU_XDR), [API](https://api.db.nomics.world/v22/series/IMF/IFS/A.7A.HPU_XDR), [series.jsonl](https://git.nomics.world/dbnomics-json-data/imf-json-data/-/raw/master/IFS/series.jsonl) (big) ```json { "attributes": { "TIME_FORMAT": "P1Y", "UNIT_MULT": "6" }, "code": "A.1C_355.BCAXF_BP6_USD", "dimensions": { "FREQ": "A", "INDICATOR": "BCAXF_BP6_USD", "REF_AREA": "1C_355" }, "name": "Annual – Curacao & St. Maarten – Balance of Payments, Supplementary Items, Current Account, Net (excluding exceptional financing), US Dollars, Millions", "observations": ... } ```