> That's why I asked for clarification of what you meant. If you are looking at this as a developer and wanting to know the existing MessageLoggers (e.g.) so you can reuse one or more messages, that's a different question than what is important to the user. Not saying it's any less important, just different.

I get it now, you are not even mentioning the interface. That would be nice to know for a developer of course. Also which guidelines to follow in case you want to create a new category and how we handle key ranges. That were the things which I had in mind.