RE: Propose vc-examples-registry work item.

I guess I fell for the suggestions in the spec that emphasize ledgers. I based my statement on texts such as the following from the current spec<https://www.w3.org/TR/did-core/>:

  *   Chapter 1, Introduction, paragraph 2 (entire text) states that DLTs provide the opportunity for fully decentralized identity management, and further elaborates on this, thereby strongly suggesting a focus on DLT's. I agree that this does not imply the converse.
  *   Chapter 1, Introduction, paragraph 4: "DID methods<https://www.w3.org/TR/did-core/#dfn-did-methods> are the mechanism by which a DID<https://www.w3.org/TR/did-core/#dfn-decentralized-identifiers> and its associated DID document<https://www.w3.org/TR/did-core/#dfn-did-documents> are created, read, updated, and deactivated on a specific distributed ledger<https://www.w3.org/TR/did-core/#dfn-distributed-ledger-technology> or network." The 'or network' is the escape here that seems to allow for different things than ledgers, but what that would mean does not become clear from the text itself.
  *   Chapter 2, Terminology, decentralized identifier (DID): "A globally unique identifier that does not require a centralized registration authority because it is registered with distributed ledger technology<https://www.w3.org/TR/did-core/#dfn-distributed-ledger-technology> (DLT) or other form of decentralized network." Same as previous bullet.
  *   Chapter 2, Terminology, DID method): " A definition of how a specific DID scheme<https://www.w3.org/TR/did-core/#dfn-did-schemes> can be implemented on a specific distributed ledger<https://www.w3.org/TR/did-core/#dfn-distributed-ledger-technology> or network". Same as previous bullet.
So you are right, while the use of DLT-stuff is (strongly) suggested by the standard, it is not required.

With respect to

  *   > the DID-stuff aims to enable interaction (communication) with the entity identified by the DID
  *   That’s also not something that I see mentioned anywhere in the DID spec.  Can you please quote a source?
That's the 4th sentence of the Abstract.

Rieks

From: Leonard Rosenthol <lrosenth@adobe.com>
Sent: woensdag 18 maart 2020 13:31
To: Joosten, H.J.M. (Rieks) <rieks.joosten@tno.nl>; daniel.hardman@evernym.com
Cc: Orie Steele <orie@transmute.industries>; W3C Credentials CG (Public List) <public-credentials@w3.org>
Subject: Re: Propose vc-examples-registry work item.

> And rightfully so since the core DID spec  explicitly states that DID-stuff belongs on DLTs
>
I think you need to re-read the spec again, as that is clearly *NOT* the case.

Right in Section 1 (Introduction), the first note is very clear on the topic:

NOTE: DID methods can also be developed for identifiers registered in federated or centralized identity management systems. Indeed, all types of identifier systems can add support for DIDs. This creates an interoperability bridge between the worlds of centralized, federated, and decentralized identifiers.

> the DID-stuff aims to enable interaction (communication) with the entity identified by the DID
>
That’s also not something that I see mentioned anywhere in the DID spec.  Can you please quote a source?

Leonard

From: "Joosten, H.J.M. (Rieks)" <rieks.joosten@tno.nl<mailto:rieks.joosten@tno.nl>>
Date: Wednesday, March 18, 2020 at 4:27 AM
To: "daniel.hardman@evernym.com<mailto:daniel.hardman@evernym.com>" <daniel.hardman@evernym.com<mailto:daniel.hardman@evernym.com>>, Leonard Rosenthol <lrosenth@adobe.com<mailto:lrosenth@adobe.com>>
Cc: Orie Steele <orie@transmute.industries<mailto:orie@transmute.industries>>, "W3C Credentials CG (Public List)" <public-credentials@w3.org<mailto:public-credentials@w3.org>>
Subject: Re: Propose vc-examples-registry work item.

And rightfully so since the core DID spec  explicitly states that DID-stuff belongs on DLTs. Also, according to the same spec (see the abstract), the DID-stuff aims to enable interaction (communication) with the entity identified by the DID, which is quite different from schemas.

So why specify that you need a DID to refer to a schema if we can generalize this to a URI? Doing so does not exclude DIDs since they are a specialization of URIs so you can still use the examples.

Rieks
________________________________
Van: Daniel Hardman <daniel.hardman@evernym.com<mailto:daniel.hardman@evernym.com>>
verzonden: woensdag 18 maart 2020 01:32
Aan: Leonard Rosenthol
Cc: Orie Steele; W3C Credentials CG (Public List)
Onderwerp: Re: Propose vc-examples-registry work item.

There is a clear bias there towards DIDs (and VC’s in general) that are based on ledgers of some fashion.

Touché. :-)

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