The limited value is used only 78 times worldwide, compared much higher usages of the other documented values (3.7k no, 13k only, 14.6k yes), see organic | Keys | OpenStreetMap Taginfo.
Also, the documented explanation of the limited value seems strange to me, as you’d need to check the ingredients lists of all products in a store:
Every organic product is partially organic, often suggested by “May contain traces of…”, or “Made on shared equipment with…”, without stating that those ingredients are organic.
Was this change discussed anywhere? Would it be okay for me to revert the change in the wiki?
Imho, yes, revert. limited is normally used in the sense of “a limited selection”, which makes no sense here, beause this would just be yes (as oppossed to only).
If I parse it correctly, I think it’s trying to be a “yes, but…” for a very particular consumer.
At first glance, there are organic products on offer so you think you can tag yes. If you actually look at those products, they have an ingredient list like
organic flour
organic sugar
…
The ingredient list is all organic. Everything seems fine. Due diligence done, time to go home.
But wait, what’s this? An allergy warning?
May contain milk and soy.
Aha! It doesn’t say “May contain organic milk and organic soy”. limited
Absolutely not (sure). But that’s what I think it’s trying to say.
More realistically, it could maybe say “produced in a factory that only handles organic products” or something, instead of messing with the actual allergy warnings.
And I expect that this allergy message is set by law and you are not able to add marketing terms there.
Even if soy contamination is 100% organic.
Also, I reject idea that contamination need to be organic as well to preserve organic=yes or organic=limited.
There are also other not listed as ingredients but you can have also other contamination, without making food illegal to sell. And it makes sense, expecting food to be free from them on level of CPU foundries (or even more sterile) would be an outrageous and pointless waste.
There’s a lot of fake organic food with ridiculously long shelf life, so I thought this change would be helpful, but it was reverted because of complication and confusion. I understand now, it’s too difficult for the average mapper to distinguish deceptive labels from real ones. It’s better to buy from local farmers instead.