|Old / previous / historic name for an element.|
|Used on these elements|
|Status: de facto|
|Tools for this tag|
- Main article: Names
The tag old_name=* is used for old / previous / historic name(s) for an element.
The tag should typically be combined with the current name=*.
For correct historic context of old names, the key may be suffixed with the date namespace. Example:
old_name:1921-1932=* (the name from 1921 until 1932)
If the start date of the name is the same as the start date of the feature/object, this can be clarified by instead using:
When combined, the language code comes before the date range:
It should be considered that historical objects of which there are no visible traces left do not belong into the OSM database.
The general rules as for name=* apply.
When only ranges of years are specified (no month or other details), a single hyphen may be used, such as "old_name:1953-1990 = Ernst-Thälmann-Straße".
When full dates are specified or the simple notation is not sufficient, a double hyphen ("--") can separate the from and to date - e.g. "amenity:1965--1971-12-18 = school".