W3C home > Mailing lists > Public > public-lod@w3.org > February 2009

Re: Minting URIs is bad?

From: David Wood <david@zepheira.com>
Date: Tue, 3 Feb 2009 08:50:51 -0500
Cc: Hugh Glaser <hg@ecs.soton.ac.uk>, Richard Cyganiak <richard@cyganiak.de>, Dan Brickley <danbri@danbri.org>, Sergio Fernández <sergio.fernandez@fundacionctic.org>, Linked Data community <public-lod@w3.org>
Message-Id: <CE7B2965-7B2B-41CE-82CA-3E8CE66F1429@zepheira.com>
To: Leigh Dodds <leigh.dodds@talis.com>

On Feb 3, 2009, at 5:29 AM, Leigh Dodds wrote:
> And within the context of the web as a whole, URIs will break. That  
> is a given. But within a specific community of practice we might  
> reasonably ask whether we can do better?

Yep, we can and occasionally should.  One way (only one!) is to create  
a Persistent URL (or Persistent URI) for ones that you care about.

In the latest updates to the Persistent URL server code (see http://purlz.org 
), we added the ability to add type information to PURLs.    Creating  
a PURL with type information allows the creator or others with  
authority to manage a URL's resolution process to maintain it over time.

A PURL can be associated with metadata that describes to the world  
whether it should be interpreted as an information resource or as a  
"real-world" resource (returning a 303 response code and optionally  
relating to a target URL containing RDF metadata).

Of course, that is still only good for URLs (not all URIs), but I  
think it is a step in the right direction.  Hopefully, we will be able  
to address the same issue for general URIs at some point in the near  
future and extend the PURL concept to deal with further computational  
separation of URI types.  Particularly, I would like to be able to  
computationally separate information resources (e.g. a URL to a Web  
page about a dog) from "real world" objects (a URL or URI used to  
identify my dog) from concepts (a URI identifying the idea of a dog).   
We can do that now, but only via commonly agreed practices that are  
not yet official standards.

I'd love to hear from the LOD community regarding these concepts.   
Flame away, please.

David Wood
Zepheira - The Art of Data
Received on Tuesday, 3 February 2009 13:51:27 UTC

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