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RE: ACTION-10 Possible contribution to the topic from DANS

From: <Manuel.CARRASCO-BENITEZ@ec.europa.eu>
Date: Tue, 8 Apr 2014 10:02:48 +0000
To: <christophe.gueret@dans.knaw.nl>
CC: <public-dwbp-wg@w3.org>
Message-ID: <39DB516E46C0E842A2CFFF1BBB7412F15F79BF59@S-DC-ESTF03-B.net1.cec.eu.int>
Christophe,

The rationale:
  - Simple URIs  - shortening  services are a symptom of bad URIs
 - Previous versions - related to time or not
 - Works with "file" and "http" - see MED https://joinup.ec.europa.eu/site/med


URI examples
   local 
      file:///foo                                       # latest
      file:///foo3                                     # version 3

   network
      http://example.com/foo

      http://example.com/foo3


Name-dropping :-)   I am a friend of Larry Masinter
   http://larry.masinter.net


Long-term archiving is one of his pet subjects
   http://larry.masinter.net/0603-archiving.pdf


Regards
Tomas

From: Christophe Guéret [mailto:christophe.gueret@dans.knaw.nl] 
Sent: Tuesday, April 08, 2014 11:24 AM
To: CARRASCO BENITEZ Manuel (DGT)
Cc: Christophe Gueret; public-dwbp-wg@w3.org
Subject: Re: ACTION-10 Possible contribution to the topic from DANS

Hoi,
Ok. So we may be onto something slightly different then... regarding your example, the temperature in Luxembourg the 2003-04-08 would most likely be fetched out of a preserved data set that contains the daily temperatures. This dataset would be preserved at, say, DANS and contain only "http://example.com/lu" URIs in it (just like every new version of DBpedia still use exactly the same URIs for the resources it contains). Then we would more likely build something like http://example.com/dataset/UUID?http://example.com/lu, the UUID being that of the dataset which contains the description of the temperatures on 2003-04-08. 

But the two problems I have with this approach are:
* The use of a parameter for the request, this makes it easier that trying to split the URI but it not as neat as having just a plain URI. In this respect, we are also looking at the IETF DURI draft (https://tools.ietf.org/html/draft-masinter-dated-uri-10) to provide a nicer dated scheme for URIs. But then we would need a dereferencing service for those DURI who is likely to take them as a GET parameter... so we just shift the issue :-\
* In order to just deliver the preserved data as it was preserved, the description should still describe http://example.com/lu and thus not take into account the fact that it is a different time-located version of the description that is being returned. We could rewrite the description on the fly but that's not a good practice wrt preservation. Maybe embedding the description into another that described the archived resource, and package the whole thing with provenance info would be a good fix there...
Cheers,
Christophe

On 8 April 2014 11:10, Manuel.CARRASCO-BENITEZ@ec.europa.eu <Manuel.CARRASCO-BENITEZ@ec.europa.eu> wrote:
Christophe,

Yes. More: an example

Temperature in Luxembourg today - dynamic URI
  http://example.com/lu


Temperature in Luxembourg the 2003-04-08 - static URI
  http://example.com/lu/2003-04-08 - static URI

Regards
Tomas

From: Christophe Guéret [mailto:christophe.gueret@dans.knaw.nl]
Sent: Friday, April 04, 2014 3:36 PM
To: public-dwbp-wg@w3.org
Subject: ACTION-10 Possible contribution to the topic from DANS

Hoi Manuel, everyone,
We've added a bit about data preservation at DANS in the use-case document:
https://www.w3.org/2013/dwbp/wiki/Use_Cases#Digital_archiving_of_Linked_Data

Does this go along the lines of what you wanted to discuss with this action ?

Christophe


--
Onderzoeker
+31(0)6 14576494
christophe.gueret@dans.knaw.nl

Data Archiving and Networked Services (DANS)
DANS bevordert duurzame toegang tot digitale onderzoeksgegevens. Kijk op www.dans.knaw.nl voor meer informatie. DANS is een instituut van KNAW en NWO.

Let op, per 1 januari hebben we een nieuw adres: 
DANS | Anna van Saksenlaan 51 | 2593 HW Den Haag | Postbus 93067 | 2509 AB Den Haag | +31 70 349 44 50 | info@dans.knaw.nl | www.dans.knaw.nl

Let's build a World Wide Semantic Web!
http://worldwidesemanticweb.org/


e-Humanities Group (KNAW)



-- 
Onderzoeker
+31(0)6 14576494
christophe.gueret@dans.knaw.nl

Data Archiving and Networked Services (DANS)
DANS bevordert duurzame toegang tot digitale onderzoeksgegevens. Kijk op www.dans.knaw.nl voor meer informatie. DANS is een instituut van KNAW en NWO.

Let op, per 1 januari hebben we een nieuw adres: 
DANS | Anna van Saksenlaan 51 | 2593 HW Den Haag | Postbus 93067 | 2509 AB Den Haag | +31 70 349 44 50 | info@dans.knaw.nl | www.dans.knaw.nl

Let's build a World Wide Semantic Web!
http://worldwidesemanticweb.org/


e-Humanities Group (KNAW)

Received on Tuesday, 8 April 2014 10:03:21 UTC

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