Hello.

I don't know how I could only become aware of your comment almost a year after the fact, but here am I.

I've always been dissatisfied with overloading the `name` tag to distinguish between baseball fields in a single park, but it was the best I could come up with.

Having a clear way to tell the baseball fields apart is crucial as other information databases (Wikidata, Wikimedia Commons) link to OpenStreetMap elements and just relying on OSM IDs is prone to eventual rot, with no clear hint about what's what, making it complicated to  re-establish a link between the two.

Your `ref` idea is a neat way to accomplish my goal.  I've started to implement it, there's about 150 baseball fields left to change in Québec, I'll get around to it.

Alas, the osmcarto renderer does not display the `ref` on the map, so from a cursory look, a random OSM user will not be able to tell the fields apart.  Despite this, I feel the overall situation is way better semantically.

Thank you for the great hint.