Federated Certificate ID - stream id uniqueness

[MartinSchmidt]

A [Federated Certficate ID (FID)] (https://project-origin.github.io/registry/concept/granular-certificates/federated-certifate-id.html) is made up of two parts, the RegistryID and the StreamID, i got a question whether or not the StreamID should be unique only within a single registry, or across the entire federated setup.

System wise within a registry is enough, since we always use FID when any commands and queries are made. But is there a benefit to enforce it across all registries?

Should this be a question for ETT?

[MartinSchmidt]

@wisbech any comment?

[wisbech]

A DID decentralized ID is well described by W3C as a 3 part id DID:METHOD:SPECIFIC-IDENTIFIER, so in a sense it is two parts DID:registry:registry-specific-id where DIDsimply specifies that you are dealing with a decentralized id.