On Jul 31, 2017, at 10:45 AM, Rich Smith via Public <public@cabforum.org> wrote:
> 
> Hi Peter,
> Overall, I like your suggestions, but could I ask that in definitions where 
> you refer to outside RFC definitions that you include those outside 
> definitions verbatim so that someone reading the BRs does not have to go 
> scouring through all the various RFCs?  For example:
> Change:
> Domain Label: A “label” as defined in RFC 7719
>  
> To:
> Domain Label: A “Label” as defined in RFC 7719: The identifier of an 
> individual node in the sequence of nodes identified by a fully qualified 
> domain name.
>  
> This will make it much easier to parse the BRs on their own.  Also, I know in 
> general that as a best practice simply pointing to the reference is better so 
> that if the reference definition changes, so would our definitions w/out 
> having to take further action.  However in this situation, I would consider 
> that a bug rather than a feature.  I don’t think we should allow changes to 
> externally referenced definition to automatically change our definitions, at 
> least in this case, without discussion and voting.

To (apologetically) throw a spanner into the works here: RFC 7719 is being 
revised, and this very definition is changing to be clearer. The current draft 
says:

   Label:  An ordered list of zero or more octets and which makes up a
      portion of a domain name.  Using graph theory, a label identifies
      one node in a portion of the graph of all possible domain names.


--Paul Hoffman
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