Re: [netmod] YANG next
Robert Varga <nite@hq.sk> Wed, 24 July 2019 14:31 UTC
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To: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>, Andy Bierman <andy@yumaworks.com>, NETMOD WG <netmod@ietf.org>
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From: Robert Varga <nite@hq.sk>
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Date: Wed, 24 Jul 2019 16:31:05 +0200
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Subject: Re: [netmod] YANG next
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On 24/07/2019 15:51, Ladislav Lhotka wrote: > Despite the fact that YANG 1.1 and NMDA are undoubtedly improvements, users may get frustrated if lazy authors (including myself) don't update their tools in a timely manner. Well, honestly, YANG 1.1, while compatible when viewed from the perspective of a client processing XML, has a different metamodel than YANG 1.0. One example for all: YANG 1.0 metamodel did not require multiple inheritence anywhere, whereas YANG 1.1 requires it to deal with 'base' being '0..n' instead of '0..1'. While it is a relatively simple change on the surface, making it happen in a software ecosystem (with API stability guarantees, release cycles, etc.) does frustrate users even in presence of non-lazy authors (who also get frustrated)... Regards, Robert
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