Re: [netmod] Fwd: New Version Notification for draft-lengyel-netmod-yang-instance-data-01.txt

Robert Wilton <rwilton@cisco.com> Tue, 26 June 2018 15:55 UTC

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To: Balazs Lengyel <balazs.lengyel@ericsson.com>, "netmod@ietf.org" <netmod@ietf.org>
References: <75383a97-d08b-b202-70a6-eab064963af8@ericsson.com> <b58d21a9-d27e-c8b3-e8e3-483dd6942c9e@cisco.com> <f946ca96-1cb2-e032-9adc-7df00702e216@ericsson.com> <20180626121156.fq5ioq2gh5sy3v7n@anna.jacobs.jacobs-university.de> <e50fdff6-caa2-aada-011e-534b14ffdcf1@cisco.com> <20180626135232.cdlrbbideyackdfe@anna.jacobs.jacobs-university.de> <e5877095-d5ee-d1e3-a144-a2e2a20062dc@cisco.com> <341ece85-4e00-dca4-580a-de234306c941@ericsson.com> <f470fd68-320e-8201-7045-68c8885ec3e2@cisco.com> <3cf59f95-8d26-44c5-2f30-947befa29f72@ericsson.com> <20180626154155.qlekivbn4sdgriua@anna.jacobs.jacobs-university.de>
From: Robert Wilton <rwilton@cisco.com>
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Date: Tue, 26 Jun 2018 16:55:32 +0100
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Subject: Re: [netmod] Fwd: New Version Notification for draft-lengyel-netmod-yang-instance-data-01.txt
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On 26/06/2018 16:41, Juergen Schoenwaelder wrote:
> On Tue, Jun 26, 2018 at 05:38:10PM +0200, Balazs Lengyel wrote:
>>     Any opinions on Rob's suggestion about a free-text versioning string?
>>     I am neutral on this.
>>
> It needs to be clear _what_ is versioned. I have seen conflicting
> views. I have heard so far:
>
> - the YANG version context once (module, path) is not sufficient anymore
I agree with Juergen, that depending on where YANG versioning goes, that 
a mechanism to provide this information is required (e.g. a list of 
modules + semvers for the schema used in the instance data).  It should 
be optional to publishers whether they populate this information.

> - the instance data version
The draft already has instance-data revisions.  I regard that as a 
mechanism for versioning instance data.  I'm not saying that this is 
necessary the right approach.

> - a version number refering to a specific software release of a server
I see this "version" as file level meta-data information, in the same 
category as name, contact, description, organization meta-data fields 
that the draft currently provides.  Another field that may be 
generically useful is the time/date stamp of when the instance data was 
generated.  Although perhaps the timestamp of the file is sufficient for 
this purpose.

Thanks,
Rob


>
> /js
>