Something that should be a bit of a warning flag is that I have two decades of identity-related experience but I still have no idea what DID even is . For reference, I've worked with three vendors' implementations of LDAP, several versions of SAML, OAuth, JWT, Okta, Azure Active Directory, etc, etc... I've even deployed Smart Card authentication in the field several times. I literally have no idea, not a clue what DI…
I'm gonna bet just from the requirements list quoted in that post that the implementations are supposed to be blockchains.
Basically it's like a urn, but every sketchy blockchain startup gets their own namespace.