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Re: Proposal for ISSUE-40 Skolemization

From: Ivan Herman <ivan@w3.org>
Date: Fri, 13 May 2011 09:42:00 +0200
Cc: Steve Harris <steve.harris@garlik.com>, Thomas Steiner <tomac@google.com>, Richard Cyganiak <richard@cyganiak.de>, "RDF-WG public-rdf-wg@w3.org" <public-rdf-wg@w3.org>
Message-Id: <8A296754-E696-4B0F-A86D-55C2BE4C0A99@w3.org>
To: Pat Hayes <phayes@ihmc.us>

On May 12, 2011, at 17:58 , Pat Hayes wrote:

> 
> On May 12, 2011, at 9:15 AM, Steve Harris wrote:
> 
>> On 2011-05-12, at 14:46, Thomas Steiner wrote:
>> 
>>>> I'd be tempted to put the proposal to the vote with only the HTTP option and see if it draws any objections.
>>> 
>>> +1 for making the URIs dereferencable. Leaves all doors open for
>>> actually putting useful content there.
>> 
>> I'm not keen on enforcing dereferencability. bNodes aren't dereferencable, so it's quite large step.
> 
> +1  Being agnostic on this is not closing doors, but it allows skolem-URI-generators to operate at high speed without having to get involved with setting up a web service as backup.

I think the main value of this whole discussion and proposals is to provide general agreement on how to do skolemization if needed, wanted, (outside of the system, etc), so that parts of the community would not reinvent the wheel. On the other hand, it seems that the issue of dereferencability is important for ones and not important or even to-be-avoided for others. As a consequence I would think that the original proposal of Sandro is the right one, ie, to provide two different approaches (and making the necessary admin steps by the IETF). One is the .well-known for http{s}, and the other is a short form. 

In terms of compactness the

urn:steveH:XXXX

seems to be the best, but that is not fully o.k., because two different organizations might generate the same URI (which is avoided with the HTTP version due to the domain being part of the URI). I guess we may fall back then to the original Sandro approach (having made a really large circle:-)

tag:yourdomain,2011:steveH:xxxxxxx

or

urn:steveH:yourdomain:XXXX

which slightly less verbose. The advantage of the latter over the tag scheme that it is possible to register steveH for urn, which makes it clearer...

Ivan


> 
> Pat
> 
> 
>> 
>> - Steve
>> 
>> -- 
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Ivan Herman, W3C Semantic Web Activity Lead
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Received on Friday, 13 May 2011 07:40:28 GMT

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