There is only the thin-to-thick transition policy, there is no thick-to-thin 
transition policy. 
Thick registries with minimal data set are still thick. 



Rubens


> Em 31 de jan. de 2025, à(s) 02:08, Marco Schrieck 
> <marco.schri...@internetx.com> escreveu:
> 
> Hi Rubens,
> 
> No its the other way. More and more gTLDs will get thin.
> 
> Ciao
> Marco
> 
> 
> On 31 January 2025 00:31:45 CET, Rubens Kuhl 
> <rubensk=40nic...@dmarc.ietf.org> wrote:
>> 
>> Don’t the remaining thin registries allow for thin to thick migration on a 
>> granular basis ? 
>> 
>> 
>> Rubens
>> 
>> 
>>> Em 30 de jan. de 2025, à(s) 18:24, Marco Schrieck 
>>> <marco.schri...@internetx.com> escreveu:
>>> 
>>> Hi
>>> 
>>> Yes the registry should generate them, but what with thin Registries.
>>> 
>>> Only we as registrar have the contact data. So we don't have a registry 
>>> generated roid.
>>> 
>>> I can generate on but the rdap profile checker require me to register the 
>>> suffix at iana.
>>> 
>>> Eg 
>>> 1234567-IX
>>> 
>>> If i don't register it we got an error the we use uncorrect value.
>>> "Globally unique identifier not registered in EPPROID"
>>> 
>>> At the moment we let it empty and got a warning instead of error.
>>> 
>>> Marco
>>> 
>>> 
>>> On 30 January 2025 22:00:50 CET, "Andrew Newton (andy)" <a...@hxr.us> wrote:
>>>> Marco,
>>>> 
>>>> Assuming you are talking about the 2019 gTLD profile, the registry
>>>> should be generating the ROIDs because it is also required of them.
>>>> 
>>>> -andy
>>>> 
>>>> On Thu, Jan 30, 2025 at 1:52 PM Marco Schrieck
>>>> <marco.schri...@internetx.com> wrote:
>>>>> 
>>>>>  As I understand it must be registered there. But as i can oversee it, 
>>>>> there are only Registries.
>>>>> 
>>>>>  Marco
>>>>> 
>>>>> 
>>>>>  On 30 January 2025 19:42:38 CET, James Mitchell 
>>>>> <james.mitch...@iana.org> wrote:
>>>>>> 
>>>>>>  My understanding is the EPP ROID is an identifier that is composed of a 
>>>>>> suffix that identifies the registry/repository to which an object 
>>>>>> belongs. That repository identifier should be registered in the IANA 
>>>>>> registry of EPP Repository Identifiers at 
>>>>>> https://www.iana.org/assignments/epp-repository-ids. I can’t speak to 
>>>>>> whether a registration is necessary for your use case – that would 
>>>>>> appear to be up to those writing the (test) requirements.
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>>  Thanks,
>>>>>> 
>>>>>>  James
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>>  From: InterNetX - Marco Schrieck <marco.schri...@internetx.com>
>>>>>>  Organization: InterNetX GmbH
>>>>>>  Date: Thursday, January 30, 2025 at 7:14 AM
>>>>>>  To: "regext@ietf.org" <regext@ietf.org>
>>>>>>  Subject: [Ext] [regext] Clarification on ROID Usage for Registrars in 
>>>>>> Thin Registry RDAP Implementations
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>>  Hi All,
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>>  I am writing to seek guidance on the handling of ROID (Repository 
>>>>>> Object IDentifier) in RDAP implementations for registrars together with 
>>>>>> thin registry models (where registrars hold domain/contact/host data). 
>>>>>> Our organization acts as a registrar and is working to comply with the 
>>>>>> RDAP profile outlined in RFC 7483 and related 2019 updates.
>>>>>> 
>>>>>>  Context
>>>>>> 
>>>>>>  ·         We operate in a thin registry environment where the registry 
>>>>>> delegates RDAP queries to registrars.
>>>>>> 
>>>>>>  ·         Our implementation uses registrar-generated identifiers (not 
>>>>>> ROIDs), as the registry does not assign or store ROIDs.
>>>>>> 
>>>>>>  ·         During RDAP testing, we encountered errors such as “globally 
>>>>>> unique identifier not registered in EPPROID”, suggesting a mismatch 
>>>>>> between our identifiers and ROID expectations.
>>>>>> 
>>>>>>  Questions
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>>  1.    RFC 7483 §10.2.4 mentions roid as optional. For registrars in 
>>>>>> thin models:
>>>>>> 
>>>>>>  2.
>>>>>> 
>>>>>>  3.    Is it acceptable to use registrar-generated handles (e.g., UUIDs) 
>>>>>> instead of ROIDs in RDAP responses?
>>>>>> 
>>>>>>  4.
>>>>>> 
>>>>>>  o    Are there best practices for mapping internal registrar IDs to 
>>>>>> RDAP handle or roid fields?
>>>>>> 
>>>>>>  o
>>>>>> 
>>>>>>  o    Did the 2019 discussions formalize any extensions (e.g., custom 
>>>>>> JSON fields) for registrars to bypass ROID requirements?
>>>>>> 
>>>>>>  o
>>>>>> 
>>>>>>  o    How do we resolve errors like “identifier not registered in 
>>>>>> EPPROID” if ROIDs are registry-managed but unavailable to registrars?
>>>>>> 
>>>>>>  §
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>>  Thank you for your insights.
>>>>>> 
>>>>>> 
>>>>>>  Ciao
>>>>>>  Marco
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>>  --
>>>>>> 
>>>>>>  InterNetX GmbH
>>>>>> 
>>>>>>  Johanna-Dachs-Str. 55 • 93055 Regensburg • Germany
>>>>>> 
>>>>>>  Tel. +49 941 59559-0
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>>  internetx.com • internetx.com/linkedin • internetx.com/twitter
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>>  Geschäftsführer:
>>>>>> 
>>>>>>  Elias Rendón Benger (CEO), Lars Krämer
>>>>>> 
>>>>>>  Amtsgericht Regensburg, HRB 7142
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