[kstenerud]

Yes, I've looked at EDN before. It's solving a similar problem, but not the same one. EDN is focused on extensibility, where as Concise Encoding is focused on concision, and binary-text compatibility.

Transit is a bridging format to other encoding formats, which is very cool, but a fairly different problem space.

Fressian is pretty close, but is binary only. The main purpose of Concise Encoding is binary-text compatible formats.