This looks like a UUID (Universally Unique Identifier): urn:uuid: 550e8400 - e29b - 4 1d4 - a 716 - 446655440000 Random Random Version random Random Variant RFC 9562 Random Random Dressingurn Links Wikipedia: Universally unique identifier — en.wikipedia.org Sources RFC 9562 (May 2024) — ietf.org