Re: [netmod] Query about augmenting module from submodule in YANG 1.0

Acee, Rob,

    Can you propose a specific change/addition to 6087Bis?

Thanks,
Lou

On 8/21/2017 10:01 AM, Acee Lindem (acee) wrote:
> Hi William, Rob, Andy,
>
> Given their limited usefulness and the detriments, perhaps we should
> discourage the creation of new submodules in RFC6087Bis.
>
> Thanks,
> Acee
>
> On 8/21/17, 9:44 AM, "netmod on behalf of Ivory, William"
> <netmod-bounces@ietf.org on behalf of william.ivory@intl.att.com> wrote:
>
>> Hi Rob,
>>
>> That would make it very hard to update existing 1.x YANG models to use
>> new features in YANG 2.x if they used submodules.  Maybe that's something
>> that no one would ever consider doing anyway, or maybe YANG 1.1 already
>> has similar differences to 1.0?  I had (perhaps naively) assumed that you
>> could migrate a namespace / model from YANG 1.0 to 2.0?
>>
>> Regards,
>>
>> William
>>
>> -----Original Message-----
>> From: netmod [mailto:netmod-bounces@ietf.org] On Behalf Of Robert Wilton
>> Sent: 21 August 2017 11:24
>> To: netmod@ietf.org
>> Subject: Re: [netmod] Query about augmenting module from submodule in
>> YANG 1.0
>>
>>
>>
>> On 09/08/2017 16:13, Juergen Schoenwaelder wrote:
>>> On Wed, Aug 09, 2017 at 05:01:09PM +0200, Ladislav Lhotka wrote:
>>>> I remember that in early stages of YANG there was some irrational
>>>> fear of introducing too many namespaces, and submodules may be a
>>>> consequence of it. As you write, submodules provide no benefits
>>>> whatsoever in terms of modularity, but the overhead in terms of
>>>> metadata, IANA registration etc. is pretty much the same as for
>>>> modules.
>>> In case YANG 2.0 is ever done, I suggest someone files a proposal to
>>> remove submodules if the cost/benefit ratio is at odds. There is
>>> nothing wrong with removing stuff that has been found problematic.
>> I agree.
>>
>> I've added 
>> https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_netmod-2Dw
>> g_yang-2Dnext_issues_26&d=DwICAg&c=LFYZ-o9_HUMeMTSQicvjIg&r=p8kyeK3u4ZYiaQ
>> 2ZPGqwkyXmQgBH6r5jpYiYWzhqJ48&m=l7c4IPL049A2bVVO14fyBMly211xU61xSHgPlAT7ow
>> I&s=-kR4fUtXArQy0RwWb32DpT1bP4X_cNqt2zJVoC0JiX8&e=
>>
>> Rob
>>
>>> The motivation for submodules was that organizations maintaining large
>>> modules with multiple people can do so without having to mess around
>>> with tools like m4 scripts to produce a single module from 'snippets'
>>> and to avoid integration surprises. But perhaps using m4 scripts and
>>> decent version control systems (that can integrate and compile on
>>> checkin) is indeed cheaper than having submodules part of the YANG
>>> language itself.
>>>
>>> /js
>>>
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