Re: [core] Yangdoctors last call review of draft-ietf-core-yang-cbor-15

"Joe Clarke (jclarke)" <jclarke@cisco.com> Mon, 14 June 2021 16:28 UTC

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From: "Joe Clarke (jclarke)" <jclarke@cisco.com>
To: Ivaylo Petrov <ivaylo@ackl.io>
CC: "yang-doctors@ietf.org" <yang-doctors@ietf.org>, "draft-ietf-core-yang-cbor.all@ietf.org" <draft-ietf-core-yang-cbor.all@ietf.org>, Last Call <last-call@ietf.org>, core <core@ietf.org>, "ivaylopetrov@google.com" <ivaylopetrov@google.com>
Thread-Topic: [core] Yangdoctors last call review of draft-ietf-core-yang-cbor-15
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Subject: Re: [core] Yangdoctors last call review of draft-ietf-core-yang-cbor-15
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On 6/14/21 07:47, Ivaylo Petrov wrote:
> Hello Joe,
>
> Thank you for your review and apologies for the delay! Please find our
> answers to your questions below. The diff with -15 is available here
> [1]. The updated version is available as txt [2] and as html [3].
>
> Thanks,
> Ivaylo
>
> [1]: https://tools.ietf.org/rfcdiff?url1=draft-ietf-core-yang-cbor&url2=http://core-wg.github.io/yang-cbor/draft-ietf-core-yang-cbor-latest.txt
> [2]: https://core-wg.github.io/yang-cbor/draft-ietf-core-yang-cbor-latest.txt
> [3]:  https://core-wg.github.io/yang-cbor/draft-ietf-core-yang-cbor-latest.html

Thanks, Ivaylo.  I'll look through the diffs, but it sounds like you
addressed all of my comments.

>> Section 4.4.1
>>
>> I think documenting the true/false value of the primitives here (noted in the
>> CBOR encoding) would aid in clarity.  For example, "primitive(20) [false]".
> [IP]: I am not against that, I am only concerned if that would be
> readable for others that are used to the diagnostic notation,
> otherwise I am fine to apply this change.

Sounds like Carsten addressed this in a follow-up.  I think his response
is reasonable whereby manual effort is removed in favor of an update
toolchain.

>
>> ===
>>
>> Section 4.5.1
>>
>> I'm being pedantic here, but ahead of the { 60123 : { ... example, you usually
>> state "CBOR diagnostic output".  You don't here, though.  I think you should
>> add it.
> [IP]: I might be misunderstanding the point, but it appears to me that
> there is such a note already, only it unfortunately appeared at the
> top of the previous page in the txt version and was quite easy to
> miss.

Yep.  Sorry.  Those darn page breaks...

>> ===
>>
>> Section 6.13.1
>>
>> It isn't clear to me how a YANG list with multiple keys or a YANG list with no
>> keys would be encoded in CBOR.  I think examples and some clarifying text would
>> help.
> [IP]: I have modified one of the examples so that it uses two keys. As
> for the other point, Is it possible to have a list with no keys being
> referenced through an instance-identifier? My understanding is that
> this is not possible, but I might be wrong. If it is not possible, we
> will only need to clarify this in the text. If it is possible, can we
> use the position in the list to identify the element?

I'm referring to something like the last example in Section 9.13.4 of
RFC 7950 for an i-i for a list entry without keys.  In this case, a
numeric identifier is used.

Joe