[Tagging] Use of namespace as a Lifecycle

Ilya Zverev ilya at zverev.info
Tue Jul 24 13:44:47 UTC 2018

Lifecycle prefixes are not for adding historic or future data in OpenStreetMap. Please see http://openhistorymap.org/ for that.

These prefixes are in OSM only to avoid mapping mistakes. For example, when a building is visible on a commonly used satellite imagery, but has been demolished, we use was:building (not sure about the exact prefix) to tell mappers not to re-add it to the map. When a mapper finds a plan for a new city block, a prefix "proposed:" will tell them that yes, we know about that plan, but it's not up yet.

Another use for lifecycle prefixes is a temporary closure. For example, when a shop closes and most likely another shop will open, we add "disused:shop" to mark the location of the POI, prompting to re-survey it.

By no means you should use these prefixes to _add_ information about something that's not there. OSM is only for objects that exist on the ground right now. With a few exceptions dictated by nature of mapping.


> 24 июля 2018 г., в 16:30, yo paseopor <yopaseopor at gmail.com> написал(а):
> Hi!
> As I have received some notes for Mueschel and other user in a authorized import of the Spanish Cadastre I want to explain some variations I use in tagging of erased items. The rationale is simple: If I can use the prefix "was:" and also exists https://wiki.openstreetmap.org/wiki/Namespace and https://wiki.openstreetmap.org/wiki/Lifecycle_prefix why I can't use it with exact information: nor "was" but the year or the exact date of the information (I know it because I am from the zone of that item).
> Yes, I see there is with some suffixes, specially name  . But if I do that I will lose some information I have had with the other tags. Also I would might use it a suffix (one user told me query it aat taginfo : about ~100 uses) . And then I think: What if I do the same but with the prefix (as the lifecycle prefix) . In that way the tags will be ordered by year, making easy the possibility to make a map with a specific year, for example. Also I don't lose any information and as the prefix (not new tags, sorry) is numeric when you order the tags to edit in software like JOSM these are together without bug disturbances or influences on the present of the information. Also these kind of tags would be able to be ignored to standard systems as iD, for example. It is better to make that in prefix than the suffix.
> Salut i mapes
> yopaseopor
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