RE: URN registration - Email found in subject

["DTG Registration" <[e-mail]>]

Hello,

No, "metadata" is a textual example of what will follow urn:dtg:...

Does our urn require an assigned number? Does this come from ietf? I don't think we require a number, apologies for the confusion.

Regarding Community Considerations, I will review the information provided and provide an update.

Many thanks,

Will Godfrey





-----Original Message-----
From: Ted Hardie [mailto:[e-mail]] 
Sent: 02 March 2011 17:52
To: DTG Registration
Cc: [e-mail]
Subject: Re: URN registration - Email found in subject

On Wed, Mar 2, 2011 at 9:31 AM, DTG Registration
<[e-mail]> wrote:
> Hello,
>
> An example of a completed URN is:
>
> urn:dtg:metadata:cs
>

I'm sorry, but does "metadata" mean the tuple of assigned number and fqdn?

> Do the IETF have a preferred mechanism to guarantee uniqueness?  Forbidding reassignment of the assigned number would not be problematic for our use of the urn.
>
There is no preferred method, but forbidding reassignment of the
string/number you assign is a relatively easy way to ensure it.

> Which community are you referring to?
>

See http://tools.ietf.org/html/rfc3406 for the registration
requirements; section 4.3 has the text on community considerations.
You may also want to look a recent registration, like
http://tools.ietf.org/html/rfc5165 for insight.

regards,

Ted Hardie

> Many thanks,
>
> Will Godfrey
>
>
>
>
> -----Original Message-----
> From: Ted Hardie [mailto:[e-mail]]
> Sent: 02 March 2011 17:13
> To: DTG Registration
> Cc: [e-mail]
> Subject: Re: URN registration - Email found in subject
>
> Howdy,
>
> The text of this NID registration seems to rely on fully qualified
> domain names never being reasssigned ("that the FQDN is never
> reassigned") to guarantee uniqueness.  This is, of course, not a
> property guaranteed by the DNS.
>
> The structure:
>
>  URN:<assigned number>:<FQDN>:<assigned string>
>
> hints, though, that the actual guarantee of uniqueness might be based
> on a tuple of the first assigned string and the fqdn.  This might
> work, though it would be simpler to forbid reassignment of the
> assigned number.
>
> Can you clarify which strategy is intended here?  An example of a
> completed URN would also be helpful.
>
> Lastly, the registration template should contain a "Community
> Considerations" section, which is missing here.
>
> regards,
>
> Ted Hardie
>
> On Wed, Mar 2, 2011 at 8:02 AM, DTG Registration
> <[e-mail]> wrote:
>> Namespace ID: To be assigned
>>
>> Registration Information:
>> Registration version number: 1
>> Registration date: 2011-02-24
>>
>> Declared registrant of the namespace:
>> Registering organization
>>        Name: Digital Television Group
>>        Address: 1 Nine Elms Lane, London, SW8 5NQ UK
>> Designated contact person
>>        Name: Ali Teffahi
>>        Coordinates: [e-mail]
>>
>> Declaration of syntactic structure:
>>        The identifier structure is as follows:
>>        URN:<assigned number>:<FQDN>:<assigned string>
>>        URN:dtg
>>
>> Relevant ancillary documentation:
>>        Definition of domain names, found in:
>>        P. Mockapetris, "DOMAIN NAMES - IMPLEMENTATION AND
>> SPECIFICATION",
>>        RFC 1035, November 1987.
>>
>> Identifier uniqueness considerations:
>>        Uniqueness is guaranteed as long as the assigned string is never
>> reassigned for a given FQDN, and that the FQDN is never reassigned.
>>
>> Identifier persistence considerations:
>>        Persistence of identifiers is dependent upon suitable delegation
>> of resolution at the level of "FQDN"s, and persistence of FQDN
>> assignment.
>>
>> Process of identifier assignment:
>>        Assignment of these URNs is delegated to individual domain name
>> holders (for FQDNs).  The holder of the FQDN registration is required to
>> maintain an     entry (or delegate it) in the DDDS. Within each of these
>> delegated name partitions, the string may be assigned per local
>> requirements.
>>
>> Process for identifier resolution:
>>        Domain name holders are responsible for operating or delegating
>> resolution servers for the FQDN in which they have assigned URNs.
>>
>> Rules for Lexical Equivalence:
>>        FQDNs are case-insensitive.  Thus, the portion of the URN
>>        URN:dtg
>>        is case-insensitive for matches.  The remainder of the
>> identifier must be considered case-insensitive also.
>>
>> Conformance with URN Syntax:
>>        No special considerations.
>>
>> Validation mechanism:
>>        None specified.
>>
>> Scope:
>>        Global.
>>
>>
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