[Tagging] Feature Proposal - RFC - Refilling a purchased drink

Jmapb jmapb at gmx.com
Fri Oct 5 18:23:54 UTC 2018

On 10/5/2018 1:23 PM, bkil wrote:

> I agree that keeping a whole price chart up to date manually is a
> tedious and error prone process yielding low added value from the
> standpoint of users and OSM, so we should definitely not be doing
> that. Although specifying the cost of a single representative item
> (cheapest or a widely available brand of beer in a pub?) could perhaps
> help categorize the venue.

Consistent with best tagging practices as I understand them:
  - It's great to tag whether something costs money or not. We have the 
"fee=" key (and "*:fee=" namespace keys) for this purpose.
  - It's sometimes helpful to tag the actual price. But there's not a 
great consensus on how to do it. Some people overload the "fee" tag with 
actual price info, some people use "fee:price=" or "fee:charge=", some 
people just use "charge=", and for toll roads people often use "toll=". 
And of course pricing structures can be quite complex, so the values 
often end up as free text description fields rather than anything parseable.
  - Adding actual price info for food/drink items is NOT done.
  - ...But, indicating the possibility of price discounts isn't entirely 
out of the question. I'm thinking of the "happy_hours" tag for bars: It 
indicates that discounted drinks are available during certain hours... 
but again, not the actual happy hour drink prices.

So applying all this to the free refills question, I'd say it's a 
reasonable thing to tag, but I'd discourage adding actual price info. 
The drink namespace structure "drink:*=*" is already in use, so offhand 
I could imagine something like
or even just
If I encountered these tags, I'd know exactly what they meant. And I'd 
be happy to know it!

An alternative might be
...which would allow us to encode discounted refills rather than just 
free/not free.

However this works out, I look forward to drinking many cups of coffee. J

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