Re: DID Formal Objection Status Update (Dec 2021)

The DID-CORE specification is explicit about how colons can be used in the method-specific-id "for establishing hierarchically partitioned namespaces".

From section 8.1..

NOTE: Colons in method-specific-id
The meaning of colons in the method-specific-id is entirely method-specific. Colons might be used by DID methods<https://www.w3.org/TR/did-core/#dfn-did-methods> for establishing hierarchically partitioned namespaces, for identifying specific instances or parts of the verifiable data registry<https://www.w3.org/TR/did-core/#dfn-verifiable-data-registry>, or for other purposes. Implementers are advised to avoid assuming any meanings or behaviors associated with a colon that are generically applicable to all DID methods<https://www.w3.org/TR/did-core/#dfn-did-methods>.

Michael


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________________________________
From: Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net>
Sent: Friday, December 17, 2021 6:46:17 PM
To: dzagidulin@gmail.com <dzagidulin@gmail.com>; W3C Credentials CG <public-credentials@w3.org>
Subject: Re: DID Formal Objection Status Update (Dec 2021)

Here's an example of an application-level DID method/object name space... this is an (abstract) example of a purchase VC/application object identified by the DID:
did:tdw:po:289303:1
[Image]


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________________________________
From: Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net>
Sent: Friday, December 17, 2021 6:30:36 PM
To: dzagidulin@gmail.com <dzagidulin@gmail.com>; W3C Credentials CG <public-credentials@w3.org>
Subject: Re: DID Formal Objection Status Update (Dec 2021)

On the Trusted Digital Web they are.

Please explain your rationale Dmitri.

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________________________________
From: Dmitri Zagidulin <dzagidulin@gmail.com>
Sent: Friday, December 17, 2021, 10:23 a.m.
To: W3C Credentials CG
Subject: Re: DID Formal Objection Status Update (Dec 2021)

And just to be clear, /none/ of those items that you mention have anything to do with DID methods. DID method identifiers are not namespaces for any of those things.

On Fri, Dec 17, 2021 at 8:10 AM Michael Herman (Trusted Digital Web) <mwherman@parallelspace.net<mailto:mwherman@parallelspace.net>> wrote:
There is a bit of an multi-organization-specific complication here:
- how are ABC Grocery's purchase orders (identified by a simple integer PO number) to be differentiated from David's Cabbages purchase orders (also identified by a simple integer PO order number from a potentially overlapping range of PO numbers)?

In the real world, we need to work with overlapping sets of basic identifiers that are only unique within a specific realm, for example...
- purchase order and invoice numbers from multiple organizations,
- waybill numbers may already have an industry solution,
- part numbers from different manufacturers,
- objects and collections of objects identified by a GraphQL or OData query sourced from different realms or collection of realms based on the same underlying query string
- in-house enterprise application developers, DBAs, and data modelers creating object name spaces for every object in their enterprise architecture ... similar/same challenges Implementors currently have selecting name spaces for their C#, Java, etc. application components.
- etc. etc. etc.

Apologies if I've ruined your "morning"... 😉🙂,
Michael Herman