Have you considered making OSM itself the submission mechanism?
This could be as simple as having a static guide on how to add bookcases to OSM. Your app could also act as an OSM editor specifically for bookcases (not a general one).
The only difficulty is data than can not be easily represented in key=value pairs, such as timetables for buses. But even this can be resolved by adding external references.
Comments
Have you considered making OSM itself the submission mechanism? This could be as simple as having a static guide on how to add bookcases to OSM. Your app could also act as an OSM editor specifically for bookcases (not a general one).
I haven't. That would be a completely different app which I'm not interested in working on, I'm afraid.
Presumably they hope to provide richer data (i.e. photograph of the library) that OSM isn't interested in.
OSM is interested in pictures, even of bookcases:
https://wiki.openstreetmap.org/wiki/Key:image
The only difficulty is data than can not be easily represented in key=value pairs, such as timetables for buses. But even this can be resolved by adding external references.
This is the correct approach.