Hi Tom,

Many thanks for your kindly help. Please see inline.

Best regards,
Bo

> -----邮件原件-----
> 发件人: tom petch [mailto:[email protected]]
> 发送时间: 2022年1月26日 1:09
> 收件人: Wubo (lana) <[email protected]>; Wubo (lana)
> <[email protected]>; [email protected];
> [email protected]
> 主题: Re: [OPSAWG] I-D Action: draft-ietf-opsawg-yang-vpn-service-pm-02.txt
> 
> From: Wubo (lana) <[email protected]>
> Sent: 25 January 2022 13:16
> 
> Hi Tom,
> 
> Thanks for the review and we will correct these issues in the next version.
> Please see inline.
> 
> <<tp> inline twice>
> 
> Best regards,
> Bo
> 
> > -----邮件原件-----
> > 发件人: tom petch [mailto:[email protected]]
> > 发送时间: 2022年1月21日 20:30
> >
> > From: OPSAWG <[email protected]> on behalf of Wubo (lana)
> > <[email protected]>
> > Sent: 20 January 2022 03:24
> >
> >
> > percentile definition seems not quite right.  You are using a
> > percentage here but there is no requirement to do so - it can be an
> > integer count or any other measurement of a proportion
> [Bo Wu] We provide two options here, and some providers think percentile is
> also useful. I'm not sure the issue. Could you elaborate a little bit?
> 
> <tp>
> Percentile is fine as a way of characterising  a distribution with a single 
> value.
> My comment is that for any percentile, be it 50-percentile, 95-percentile or
> whatever, then there is a value to go with that and that value can be anything
> that is a value - integer, percentage etc.  I think that the description here
> wants it to be a percentage which I think too limiting.
> 
[Bo Wu] Thanks for the explanation. How about the following change?
OLD:
     typedef percentile {
       type decimal64 {
         fraction-digits 5;
         range "1..100";
       }
       description
         "The percentile is a statistical value that indicates that a
          certain percentage of a set of data falls below it.";
     }
     
NEW:
     typedef percentile {
       type decimal64 {
         fraction-digits 2;
           range "0..100";
       }
       description
         "The percentile is a value between 0 and 100, e.g. 10, 99.9 ,99.99 
etc. . 
         For example, if the percentile is set to 95. For a given one-way delay 
measurement, 
         if the 95th percentile one-way delay is 2 milliseconds, then the 95 
percent of the sample value is less than or 
         equal to 2 milliseconds.";
     }
> >

> > 'middle-delay' I think confusing; sounds too much like it is the
> > median or mode; perhaps medium?
> [Bo Wu] Agree. rfc3393 uses median to indicate 50th percentile. so we change
> it to "median-delay"?
> 
> <tp>
> Well no, it is median only when it is a 50-percentile which is only the 
> default
> here and if the user chose 90 instead, wanting the three percentiles to be 60,
> 90, 95, then I think median is misleading.
> 
> And RFC3393 says (along with defining ipdv:-) that the 50-percentile is the
> median which is correct.  Here you are defining low, something else, high and
> when something else is not 50, then it is not the median.  I am struggling 
> for a
> word that sits between low and high that does not have connotations of being
> the middle!  intermediate?

[Bo Wu]Got it. Thanks. We will change it to "intermediate" to avoid the 
confusion. 
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