I want to add POI management functionality to an existing software project. Though providing a list of categories seems a bit tricky. On one side, I do not want to reinvent the wheel and create my own categories. On the other side, I could not find a definitive "source of truth" for categorizing POIs.
What POI lists do you know of, and what would be your advice for choosing a set of categories?
To give a bit more context: I'm aware that OSM has a quite extensive tag list. Besides OSM, there are various vendors having custom / proprietary POI lists. There may also be standards that I'm not aware of which define POI categories as well.
My software tries to address a broad range of POI categories, making it easy for existing solutions to adopt my software. Though since there is no such thing as a standard (that I'm aware of) defining POI categories, I wonder if there is something like a common denominator, e.g. a list of "default" tags that is commonly accepted by different vendors or standards, like a "restaurant" or "toilet" tag.