[DorothySim]

a) is particularly interesting to me. I thought about giving people ability to create their own namespaces and used https://user.example.com or https://example.com/user as a namespace but tag URI looks cleaner.

By the way why did you need human readable IDs? I'm asking out of curiosity because there is certain charm to just using UUIDs everywhere (and urn:uuid).

[pacaro]

There were some places, where only machines would interact with them, that we used urn:uuid. But we had UI, code, and log files etc, where developers needed to interact with them too