[Tagging] JOSM preset with strange tag values

Martin Koppenhoefer dieterdreist at gmail.com
Thu Mar 3 10:13:57 UTC 2016


2016-03-03 8:35 GMT+01:00 Dave Swarthout <daveswarthout at gmail.com>:

> For example, I agree "sells" would be a better tag than "sale" but sale is
> already present in the JOSM preset.




Well, then remove it and change it to "sells:" ;-)
Have a look at the current usage of "sale":
http://taginfo.osm.org/keys/sale#values
while at first this looks like an almost established tag (900+ uses),
you'll soon see that it doesn't allow to be interpreted and by what you
state it isn't even documented.
72% of values are "yes" 17% are "no" (so what is "sale=yes" supposed to
mean, that the shop is for sale? That it does sell something? How many
motorcycle shops do not sell something? IMHO these 17% sale=no are ill
tagged and should rather not get a shop=motorcycle at all), some few are
"used" and "used_only" (there is already a different more established tag
for these: http://taginfo.osm.org/keys/second_hand#values ), I can't even
guess what sale=brand, sale=retail, sale=architecture, sale=Razzo,
sale=brands, sale=off or sale=now-on or sale=Bing mean. My suggestion is to
mark the tag as not suggested for application.

Rather than introducing new tags via editor presets people should "discuss"
new tags (e.g. by dropping a note on the tagging ML), because this way they
can be pointed to other tags that are already in use for the same thing or
to problems that arise from the proposed way of tagging. After/during this
discussion, the intended meaning of a tag should be documented in the wiki
to avoid people believing the same tags to mean different things.

Cheers,
Martin
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