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Re: [netmod] js review of draft-ietf-netmod-schema-mount-09

Lou Berger <lberger@labn.net> Wed, 11 April 2018 15:00 UTC

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From: Lou Berger <lberger@labn.net>
To: Martin Bjorklund <mbj@tail-f.com>, j.schoenwaelder@jacobs-university.de
Cc: netmod@ietf.org
References: <20180410143416.4y5wofkhr67wxxo4@elstar.local> <20180410.225800.2211357338649569621.mbj@tail-f.com> <20180411062021.i6h2c3z3kf4otae7@elstar.local> <20180411.084642.1344446330417036664.mbj@tail-f.com>
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Date: Wed, 11 Apr 2018 10:45:10 -0400
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Subject: Re: [netmod] js review of draft-ietf-netmod-schema-mount-09
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Hi,
	I have a suggested minor clarification below.


----------
On April 11, 2018 2:47:24 AM Martin Bjorklund <mbj@tail-f.com> wrote:

> Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> wrote:
>> On Tue, Apr 10, 2018 at 10:58:00PM +0200, Martin Bjorklund wrote:
>> > Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> wrote:
>> > > On Tue, Apr 10, 2018 at 04:15:46PM +0200, Martin Bjorklund wrote:
...
>> > Ok.  How about adding two sentences at the end of the last paragraph
>> > in section 3.3, giving:
>> >
>> >   The mounted schema is determined at run time: every instance of the
>> >   mount point that exists in the operational state MUST contain a copy
>> >   of YANG library data that defines the mounted schema exactly as for
>> >   a top-level schema. A client is expected to retrieve this data from
>> >   the instance tree, possibly after creating the mount point.  In the
>> >   "inline" case, instances of the same mount point MAY use different
>> >   mounted schemas, whereas in the "shared-schema" case, all instances
>> >   MUST use the same mounted schema.  In the "inline" case, if two
>> >   instances have the same YANG library checksum it is not guaranteed
>> >   that the YANG library contents are equal for these instances.
>>
>> This text says "A client is expected to retrieve this data from the
>> instance tree, possibly after creating the mount point.", which seems
>> a bit odd. How does a client create a mount point? First, a mount
>> point is created by defining it in a YANG module, so this is
>> specification time not runtime. Perhaps you mean 'instantiated' rather
>> than 'created' but even then it is somewhat unclear how a client does
>> that in general. Perhaps simple drop ', possibly after creating the
>> mount point'.
>
> Ok, I will do that.
>

I suggest adding to text to make it unambiguous that the MUST applies to 
the same mount point nodes in a schema, perhaps:
OLD
    all instances MUST
NEW
    all instances of the same mount point MUST

Lou

>
> /martin
>
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