Re: [foaf-dev] Re: privacy and open data

Just to say here that I agree with Kingsley's answers.

Also thanks for making me aware of POWDER's new GRDDLable XML format.  
Very nice. I think POWDER could be useful here at some point.

Also notice how I am able to sign my foaf file

at http://bblfish.net/people/henry/card.n3 with the following relations

<http://bblfish.net/people/henry/card.rdf>
        wot:assurance <http://bblfish.net/people/henry/ 
asc.card.rdf.asc> ;
        awol:type "application/rdf+xml" .
<http://bblfish.net/people/henry/card.n3>
        wot:assurance <http://bblfish.net/people/henry/ 
asc.card.n3.asc> ;
        awol:type "text/rdf+n3" .

HTTP also has headers to help determine the length of validity of a  
representation. So one can also get some way using that.

Henry

On 26 Mar 2008, at 14:53, Kingsley Idehen wrote:
>
> Phil Archer wrote:
>> Henry, all,
>>
>> I've jumped back to the start of this thread to raise an additional  
>> concern/use case about the whole issue of data portability and  
>> privacy protection.
>>
>> I've been told many times that once asserted, an RDF triple  
>> persists until the entropic heath death of the universe. Therefore  
>> any privacy protection system that depends on triples, at least in  
>> theory, cannot support the rather human practices of growing up,  
>> changing one's mind, changing jobs etc.
>>
>> If I allow my e-mail address to be seen by anyone who is no more  
>> than 2 hops from my FOAF file, I would want that check be carried  
>> out in real time so that if I deleted someone from my FOAF file,  
>> the permission would not be granted. But does this break the  
>> Semantic model?
> Phil,
>
> Simple answer is: No.
>>
>> In the POWDER WG, with help from Jeremy Carroll, we've defined a  
>> semantic extension to make it possible to put an expiry date on  
>> triples [1]. Can something like this be worked into data portability?
>>
>> I could back this up with a nice gentle "I've changed job so no  
>> more e-mail about its staff social functions please" but here's a  
>> more scary one:
>>
>> Imagine a teenage girl who is being abused at home. She uses her  
>> social network to call for help. Luckily, she finds it and manages  
>> to escape the dangerous home life. Now she wants to keep in touch  
>> with her new support network but become invisible to her former  
>> abuser.
> She assumes a new Identity via a new URI in here new Social Space.
>>
>> In short, any privacy control needs to support changing  
>> circumstances.
> One URI dies and another is born :-)
>
>
> Kingsley
>>
>> Phil.
>>
>> [1] http://www.w3.org/TR/2008/WD-powder-dr-20080317/#temporalSE
>>
>
>
> -- 
>
>
> Regards,
>
> Kingsley Idehen	      Weblog: http://www.openlinksw.com/blog/~kidehen
> President & CEO OpenLink Software     Web: http://www.openlinksw.com
>
>
>
>