Re: NEW RELATIONS: timegate ; timemap ; memento ; original

[Jan Algermissen <[e-mail]>]

Herbert,

On 17.03.2013, at 15:49, Herbert van de Sompel <[e-mail]> wrote:

> Dear Jan,
> 
> In the link relation registry at
> http://www.iana.org/assignments/link-relations/link-relations.xml I
> see several entries that point to versions of Internet Drafts:
> 
> - http://tools.ietf.org/html/draft-snell-additional-link-relations-07
> - http://tools.ietf.org/html/draft-wilde-profile-link-04

That is strange - but I guess the idea is to update them, once the specs are done.

Agreed - there is no reason your link relation types could not be defined the same way.

Having said that, I suggest some corrections to the I-D.

- Throughout section 2.2 please s/Relation Type/Link Relation Type/

- You write that resource MUST/SHOULD include certain Link headers but it is the response entities that you mean, yes?
  Can you be more precise, what response entities and which requests you are referring too? Supposedly GET, or?

- I am not entirely sure whether such things can be constrained - I feel this is an over-specification that goes
  beyond HTTP. IOW: I think it is up to the server.

  Can you reword that in a "if you find a link with rel type XY, then ...." fashion?

  @Mark, Julian - what is your take on this?


Jan




> 
> If for some reason the same approach can not be followed for the
> Memento relation types, then I can see two alternatives:
> 
> (1) Use the version-independent URI of the spec as posted on the Memento site:
> 
> http://www.mementoweb.org/guide/rfc/ID/
> 
> The current version of the Internet Draft is always available from
> that URI, and the RFC will eventually be available from there too.
> 
> (2) Use the version-independent URI of the spec in the IETF data tracker:
> 
> https://datatracker.ietf.org/doc/draft-vandesompel-memento/
> 
> Many greetings
> 
> Herbert
> 
> On Sun, Mar 17, 2013 at 8:14 AM, Jan Algermissen
> <[e-mail]> wrote:
>> Hi Herbert,
>> 
>> I think we need the reference to be a stable document first. Pointing to a 06-version does not seem to make much sense, IMO.
>> 
>> Jan
>> 
>> 
>> On 04.03.2013, at 01:07, Herbert van de Sompel <[e-mail]> wrote:
>> 
>>> Hi all,
>>> 
>>> I would like to request adding the following Relation Types to the Registry:
>>> - "timegate"
>>> - "timemap"
>>> - "memento"
>>> - "original"
>>> 
>>> These Relation Types are used in Memento "Time Travel for the Web" for
>>> which a new Internet Draft was just published at
>>> http://www.ietf.org/id/draft-vandesompel-memento-06.txt
>>> 
>>> I include the description of each Relation Type below. For
>>> completeness, I also include the meaning of the terms TimeGate,
>>> TimeMap, Memento, Original Resource as introduced in the Memento
>>> specification:
>>> 
>>>  o  Original Resource: An Original Resource is a resource that
>>> exists or used to exist, and for which access to one of its prior
>>> states may be required.
>>> 
>>>  o  Memento: A Memento for an Original Resource is a resource that
>>> encapsulates a prior state of the Original Resource.
>>> 
>>>  o  TimeGate: A TimeGate for an Original Resource is a resource that
>>> is capable of datetime negotiation to support access to prior states
>>> of the Original Resource.
>>> 
>>>  o  TimeMap: A TimeMap for an Original Resource is a resource from
>>> which a list of URIs of Mementos of the Original Resource is
>>> available.
>>> 
>>> Greetings
>>> 
>>> Herbert Van de Sompel
>>> 
>>> ==================
>>> 
>>> Relation Type: timegate
>>> 
>>> Description: A link with a "timegate" Relation Type is used to point
>>> from the Original Resource, as well as from a Memento associated with
>>> the Original Resource, to a TimeGate for the Original Resource.
>>> 
>>> Reference: http://www.ietf.org/id/draft-vandesompel-memento-06.txt
>>> 
>>> Notes: Used in the Memento "Time Travel for the Web" framework.
>>> 
>>> ==================
>>> 
>>> Relation Type: timemap
>>> 
>>> Description: A link with a "timemap" Relation Type is used to point
>>> from a TimeGate or a Memento associated with an Original Resource, as
>>> well as from the Original Resource itself, to a TimeMap for the
>>> Original Resource.
>>> 
>>> Reference: http://www.ietf.org/id/draft-vandesompel-memento-06.txt
>>> 
>>> Notes: Used in the Memento "Time Travel for the Web" framework.
>>> 
>>> ==================
>>> 
>>> Relation Type: memento
>>> 
>>> Description: A link with a "memento" Relation Type is used to point
>>> from a TimeGate or a Memento for an Original Resource, as well as from
>>> the Original Resource itself, to a Memento for the Original Resource.
>>> 
>>> Reference: http://www.ietf.org/id/draft-vandesompel-memento-06.txt
>>> 
>>> Notes: Used in the Memento "Time Travel for the Web" framework.
>>> 
>>> ==================
>>> 
>>> Relation Type: original
>>> 
>>> Description: A link with an "original" Relation Type is used to point
>>> from a TimeGate or a Memento to its associated Original Resource.
>>> 
>>> Reference: http://www.ietf.org/id/draft-vandesompel-memento-06.txt
>>> 
>>> Notes: Used in the Memento "Time Travel for the Web" framework.
>>> 
>>> ==================
>>> 
>>> --
>>> Herbert Van de Sompel
>>> Digital Library Research & Prototyping
>>> Los Alamos National Laboratory, Research Library
>>> http://public.lanl.gov/herbertv/
>>> 
>>> ==
>>> _______________________________________________
>>> link-relations mailing list
>>> [e-mail]
>>> https://www.ietf.org/mailman/listinfo/link-relations
>> 
> 
> 
> 
> -- 
> Herbert Van de Sompel
> Digital Library Research & Prototyping
> Los Alamos National Laboratory, Research Library
> http://public.lanl.gov/herbertv/
> 
> ==