(This is a subtask of T288511: improve handling of dates - calendar models and precision)
- add meta_wikidata_value column:
- to the CSV file format
- to the database (relevant table)
- The column should be optional
- validation:
- only “Time” properties are allowed
- must contain a single item ID
Note: for more clarity, the new column contains a calendar item Id, that is only allowed rows with a time property. A time property is a property with the datatype “time”, like P569 or P585