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Re: [yang-doctors] [IANA #1196397] marking obsolete/deprecated values in YANG modules

Ladislav Lhotka <ladislav.lhotka@nic.cz> Tue, 18 May 2021 17:50 UTC

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To: Sabrina Tanamal via RT <iana-issues@iana.org>, yang-doctors@ietf.org
References: <RT-Ticket-1196397@icann.org> <rt-4.4.3-27117-1620075389-530.1196397-37-0@icann.org> <rt-4.4.3-3986-1620076481-575.1196397-37-0@icann.org> <rt-4.4.3-27769-1621353267-1315.1196397-37-0@icann.org> <20210518164555.u3qzt2mtaki45u2g@anna.jacobs.jacobs-university.de>
From: Ladislav Lhotka <ladislav.lhotka@nic.cz>
Organization: CZ.NIC
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Date: Tue, 18 May 2021 19:50:31 +0200
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Subject: Re: [yang-doctors] [IANA #1196397] marking obsolete/deprecated values in YANG modules
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On 18. 05. 21 18:45, Juergen Schoenwaelder wrote:
> Dear Sabrina,
> 
> the answer may depend on what the meaning of 'obsolete' is for
> IANA. In YANG, we distinguish 'deprecated' from 'obsolete'
> (RFC 7950):
> 
>    o  "deprecated" indicates an obsolete definition, but it permits
>       new/continued implementation in order to foster interoperability
>       with older/existing implementations.
> 
>    o  "obsolete" means that the definition is obsolete and SHOULD NOT be
>       implemented and/or can be removed from implementations.
> 
> The question is whether the IANA obsolete value 7 is still in use in
> the wild. If so, marking it 'deprecated' in YANG may be the right
> move. If, however, the value 7 is in no use anymore, i.e., it is kind
> of historic, then it may be justified to mark it as 'obsolete' in
> YANG.

According to RFC 8126:

Specific entries in a registry can be marked as "obsolete" (no longer in
use) [...]

So the obsolete status in YANG seems appropriate.

Lada

> 
> /js
> 
> On Tue, May 18, 2021 at 03:54:28PM +0000, Sabrina Tanamal via RT wrote:
>> Dear YANG Doctors,
>>
>> Resending this message. In the SAFI Values registry at https://www.iana.org/assignments/safi-namespace/, we recently marked value 7 Encapsulation SAFI as obsolete for RFC 9012. Do we also need to mark this as obsolete in the iana-routing-types YANG module?
>>
>> If so, would the appropriate description be "Tunnel Encap SAFI (OBSOLETE)."?
>>
>> Thanks,
>>
>> Sabrina Tanamal
>> Senior IANA Services Specialist
>>
>> On Mon May 03 21:14:41 2021, sabrina.tanamal wrote:
>>> Dear YANG Doctors,
>>>
>>> In the SAFI Values registry at https://www.iana.org/assignments/safi-
>>> namespace/, we recently marked value 7 Encapsulation SAFI as obsolete
>>> for RFC 9012. Do we also need to mark this as obsolete in the iana-
>>> routing-types YANG module?
>>>
>>> If so, would the appropriate description be "Tunnel Encap SAFI
>>> (OBSOLETE)."?
>>>
>>> Thanks,
>>>
>>> Sabrina Tanamal
>>> Senior IANA Services Specialist
>>
>> _______________________________________________
>> yang-doctors mailing list
>> yang-doctors@ietf.org
>> https://www.ietf.org/mailman/listinfo/yang-doctors
> 

-- 
Ladislav Lhotka
Head, CZ.NIC Labs
PGP Key ID: 0xB8F92B08A9F76C67

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