Re: [lmap] Benoit Claise's No Objection on draft-ietf-lmap-yang-11: (with COMMENT)
Benoit Claise <bclaise@cisco.com> Thu, 16 March 2017 12:54 UTC
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From: Benoit Claise <bclaise@cisco.com>
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Date: Thu, 16 Mar 2017 13:54:21 +0100
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Subject: Re: [lmap] Benoit Claise's No Objection on draft-ietf-lmap-yang-11: (with COMMENT)
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Hi Jürgen, > On Thu, Mar 16, 2017 at 12:47:09PM +0100, Benoit Claise wrote: >> On 3/16/2017 11:26 AM, Juergen Schoenwaelder wrote: >>> On Thu, Mar 16, 2017 at 02:27:31AM -0700, Benoit Claise wrote: >>>> ---------------------------------------------------------------------- >>>> COMMENT: >>>> ---------------------------------------------------------------------- >>>> >>>> - No objection to the publication, but the following phrasing puzzles >>>> me. >>>> >>>> It aims to be consistent with the >>>> LMAP Information Model [I-D.ietf-lmap-information-model]. >>>> >>>> Actually, the data model is based on information model, right? >>> I changed this to "It is based on the LMAP Information Model []" in >>> my sources. >>>> >From the charter: >>>> 5. The Report protocol and the associated data model: The definition of >>>> >>>> how the Report is delivered from a MA to a Collector; this includes a >>>> Data Model consistent with the Information Model plus a transport >>>> protocol (to be selected, perhaps REST-style HTTP(s) or IPFIX). >>>> >>>> This is reason why the information model is standard track in the >>>> charter. >>>> Therefore the information model must be a normative reference, right? >>> I don't quite understand the logic above. That said, I can go either >>> way (means I do not really care whether the reference is in the >>> normative of informative section). >> The question is: which one is the source of truth? The IM or the DM? > When it comes to implementation, I think it is the YANG model you have > to conform to. If the YANG model has a conflict with the information > model somewhere, we need to discuss and resolve this. I do not think > we can state one of them is automatically right. You're not helping :-) "It is based on the LMAP Information Model []" is already good change. Informative versus normative is a smaller issue IMO. A small preference for normative, but I'll leave it to the responsible AD to decide. The rest below was discussed. Let's move on. Regards, Benoit > >>>> - one question about the typedefs naming. >>>> It would nice to be able to reuse YANG constructs, typedefs being of >>>> them >>>> We created http://www.yangcatalog.org/yang-search/yang-search.php with >>>> that goal in mind. >>>> => insert "identifier" >>>> => select typedef >>>> Some of the typedefs are so generically named in LMAP YANG module: >>>> identifier, tag, cycle-number, wildcard, etc. >>>> Do you expect YANG designers to reuse them outside of LMAP? Some of them, >>>> I guess so >>>> Should the other ones be renamed with LMAP in mind. Ex: >>>> lmap-identifier? >>>> In other words, are all the ietf-lmap-common.yang typedef common? > I do not care. I leave it up to whoever wants to reuse them to decide. > The definitions are clearly common for the LMAP modules, everything > beyond that is up in the air. > > Recall the SnmpAdminString where the name indicates it is for SNMP > adminitrative names but then later it got used in many places as a > common string type supporting UTF-8. Prediction of future use and > encoding that into names is difficult. > >>> When you reuse definitions from ietf-lmap-common, they will appear in >>> your YANG module as: >>> >>> type lmap:identifier; >> Sure. >>> Adding lmap to the type name just makes things look unnecessarily >>> ugly: >> ... from a LMAP point of view. >>> type lmap:lmap-identifier; >> I come from this angle: >> http://www.yangcatalog.org/yang-search/yang-search.php >> And I search for any identifier typedef I could reuse. >> I would prefer to have typedefs called LMAP-xxx is they're not really >> common. > Obviously, the typedefs were written primarily for LMAP > purposes. However, for all typedefs, I can imagine situations where > they may be reused outside LMAP. The groupings are more likely LMAP > specific but even then I can also imagine that perhaps some future > IPPM modules may want to use them. Predicting future is difficult. > > /js >
- [lmap] Benoit Claise's No Objection on draft-ietf… Benoit Claise
- Re: [lmap] Benoit Claise's No Objection on draft-… Juergen Schoenwaelder
- Re: [lmap] Benoit Claise's No Objection on draft-… Benoit Claise
- Re: [lmap] Benoit Claise's No Objection on draft-… Juergen Schoenwaelder
- Re: [lmap] Benoit Claise's No Objection on draft-… Benoit Claise