Re: Application for a formal URN NID ("EIDR")

Ted Hardie <ted.ietf@gmail.com> Wed, 05 February 2014 19:14 UTC

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Date: Wed, 5 Feb 2014 11:14:16 -0800
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Subject: Re: Application for a formal URN NID ("EIDR")
From: Ted Hardie <ted.ietf@gmail.com>
To: Pierre-Anthony Lemieux <pal@sandflow.com>
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Thanks for sending your draft for review.  A few quick points:

The draft currently says:

EIDR-NSS = DOI-PREFIX ":" DOI-SUFFIX

This would seem to imply that any DOI prefix may be
encountered and that this NID could be used with any
registered DOI.  IF that were the intent, I would

suggest registering the namespace "DOI" instead.  I
understand that the DOI folks have consciously chosen not
to do that(cf: http://www.doi.org/factsheets/DOIIdentifierSpecs.html),

though, so I suspect your intent is to limit this to a subset
of DOIs.  Is that correct?  Is it essentially limited to 10.5240?
If not, how will the appropriate subset be identified?

This comes up again here:

When DOI-PREFIX is equal to "10.5240", the syntax of DOI-SUFFIX is
further constrained according to [SMPTERP2079] as follows:

           DOI-SUFFIX   = EIDR-SUFFIX
           EIDR-SUFFIX  = 5*5(4*4HEXDIG "-") CHECK
           DIGIT        = %x30-39
           HEXDIG       = DIGIT / "A" / "B" / "C" / "D" / "E" / "F"
           ALPHA        = %x41-5A / %x61-7A
           CHECK        = DIGIT / ALPHA

I don't think this says quite what you intend.  I think what you

intend is to say is that the overall syntax is roughly either:

urn:eidr:10.5240:EIDR-SUFFIX

or

urn:eidr:DOI-PREFIX-which-is-not-10.5240:DOI-SUFFIX

If the use of the URN is only for 10.5240, then you can just
drop the second syntax.  If it is for a set of DOI prefixes,
none of which but 10.5240 is intended to have this restriction,

then I believe you want to say, roughly:

EIDR-NSS = EIDR-PREFIX ":" EIDR-SUFFIX


where EIDR-SUFFIX has a choice pattern:

EIDR-SUFFIX: SMPTERP2079-SUFFIX | DOI-SUFFIX

And the list of DOI prefixes suitable for EIDR-PREFIX is
set you register as such. The syntax of the prefix can still

match the general DOI prefix.

Later, the document says:

Rules for Lexical Equivalence:

      Two EIDR-NSS are equivalent if and only if they are equal.  EIDR-
      NSS are case-insensitive.

"equal" here doesn't have a precise meaning.  I'd suggest that

you say something like "are lexically equivalent based on
a case insensitive string match"

regards,

Ted Hardie



On Tue, Feb 4, 2014 at 10:32 PM, Pierre-Anthony Lemieux <pal@sandflow.com>wrote;wrote:

> Good morning/evening,
>
> Per IETF RFC 3406, please find at the link below an application for a
> formal URN NID ("EIDR").
>
> http://www.ietf.org/id/draft-pal-eidr-urn-00.txt
>
> Very much Looking forward to your comments and feedback. Let me know
> if you need additional information.
>
> Best,
>
> -- Pierre [on behalf of MovieLabs (http://movielabs.com)]
>