W3C home > Mailing lists > Public > public-vocabs@w3.org > June 2014

Re: How do you flag a resource which is not available anymore?

From: Karen Coyle <kcoyle@kcoyle.net>
Date: Mon, 02 Jun 2014 10:16:30 -0700
Message-ID: <538CB16E.3020407@kcoyle.net>
To: public-vocabs@w3.org
I think you need a property that has the semantics "namespace does not 
resolve to original ontology information, as of date yyyy-mm-dd" You're 
basically recommending that other users not attempt to resolve, or at 
least not believe what is at the other end of the URI/URL.

I think this should be an LOV-defined property, and of course people can 
choose whether or not they will pay attention to it, since it is your 
decision to set this property.

That said, has anyone defined a property for alternate namespaces? (I'm 
thinking like "samePropertyAs" but on a namespace basis.) For example, 
Dublin Core can be de-referenced both to purl.org and dublincore.org. If 
there is a way to define alternate namespaces, then ontology owners who 
know that they are leaving their ontology behind can archive the 
ontology (e.g. using the Internet Archive) and note the alternate 
namespace.

kc



On 6/2/14, 9:47 AM, Bernard Vatant wrote:
> Karen, Kingsley
>
> Sorry, rant ahead :)
>
> HTTP URIs are both identifiers and locators and there are thousands of
> pages expanding at length on what they mean or not, etc. I don't want to
> go again in this permathread of URI meaning. Just want a name to flag
> clearly a situation which will be more and more frequent, and which
> semantic web actors just plainly ignore or even contribute to create.
> See below.
>
> Please look at just the following example, and tell me what is your
> concrete proposal, beyond all theory.
>
> http://lov.okfn.org/dataset/lov/details/vocabulary_geof.html
>
> A backup version of the vocabulary is available at
> http://lov.okfn.org/dataset/lov/agg/archives/dir_geof/file_geof_2004-02-20.n3
>
> Now look at what the vocabulary
> http://www.mindswap.org/2003/owl/geo/geoFeatures20040307.owl is
> currently dereferencing to.
> It's 100 times worse than having a 404. It's nothing to do with
> temporary failure, mindswap.org <http://mindswap.org> which used to host
> a wealth of precious resources for the Semantic Web (see
> http://www.cs.rpi.edu/~hendler/presentations/Harvard-IIC-05.pdf) is
> currently a domain to sale with a garbage placeholder for any URI
> http://www.mindswap.org/whatever-goes-here. And the devil knows who is
> going to buy it tomorrrow and what the content will be.
>
> OK the future is unknown, but in that case I can bet anything you want
> that this domain will never ever come back to its original owner and the
> URIs as geof restored in line, because the original domain owner is
> linked to a project which is over for quite a while.
>
> I would be curious to have the take of Jim Hendler on this, since he was
> the leader of mindswap project. Any chance to catch the domain back?
>
> See also aktors.org <http://aktors.org>, which is for sale, and down the
> semantic drain goes AKT ontology, with all the data using it after 10
> years online
> http://lov.okfn.org/dataset/lov/details/vocabulary_akt.html
>
> What I want is a quick-and-dirty way to show this to the face of the world.
>
> Best regards
>
> Bernard
>
>
>
>
> 2014-06-02 17:33 GMT+02:00 Kingsley Idehen <kidehen@openlinksw.com
> <mailto:kidehen@openlinksw.com>>:
>
>     On 6/2/14 11:03 AM, Karen Coyle wrote:
>>     Bernard, the difference seems to be that I do not consider the URI
>>     to be dead, only the information that the URI points to. The URI
>>     no longer functions **also** as a URL -- it no longer locates, but
>>     it still identifies. [*]
>
>     +1
>
>     The Term has be downgraded to a Word :-)
>
>     [1] http://www.wikihow.com/Differentiate-Between-a-Term-and-a-Word
>
>     --
>
>     Regards,
>
>     Kingsley Idehen	
>     Founder & CEO
>     OpenLink Software
>     Company Web:http://www.openlinksw.com
>     Personal Weblog:http://www.openlinksw.com/blog/~kidehen
>     Twitter Profile:https://twitter.com/kidehen
>     Google+ Profile:https://plus.google.com/+KingsleyIdehen/about
>     LinkedIn Profile:http://www.linkedin.com/in/kidehen
>
>
>
>
>
>
>
> --
> *Bernard Vatant
> *
> Vocabularies & Data Engineering
> Tel : + 33 (0)9 71 48 84 59
> Skype : bernard.vatant
> http://google.com/+BernardVatant
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-- 
Karen Coyle
kcoyle@kcoyle.net http://kcoyle.net
m: 1-510-435-8234
skype: kcoylenet
Received on Monday, 2 June 2014 17:17:03 UTC

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