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draft-chen-rdns-urn-05 (Re: two-week review: registering formal "rdns" NID)

worley@ariadne.com (Dale R. Worley) Fri, 18 March 2016 20:50 UTC

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From: worley@ariadne.com
To: "Ing-Wher (Helen) Chen" <ichen@kuatrotech.com>
Subject: draft-chen-rdns-urn-05 (Re: two-week review: registering formal "rdns" NID)
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This version clarifies and simplifies many issues and I think it is
nearly ready for publication.  However, there are two issues:

       <rdns-trans>     ::= <lower> | <number> | <others> | <reserved>

Comparing with RFC 2141, "<others>" should be "<other>".

The alternative "<reserved>" should be removed.  In RFC 2141, I see:

   <trans>       ::= <upper> | <lower> | <number> | <other> | <reserved>

However the final alternative in that production is not to be used in
practice.  Its expansion is:

   <reserved>    ::= '%" | "/" | "?" | "#"

However, the immediately following text in 2141 states that "%" is to be
used only to introduce %-escapes (which this draft does in the
production "<rdns-URN-char>").  And the remaining three characters are
described as 

   RFC 1630 [2] reserves the characters "/", "?", and "#" for particular
   purposes. The URN-WG has not yet debated the applicability and
   precise semantics of those purposes as applied to URNs. Therefore,
   these characters are RESERVED for future developments.  Namespace
   developers SHOULD NOT use these characters in unencoded form, but
   rather use the appropriate %-encoding for each character.

Dale

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