Re: Derived Attributes

On 23/08/2017 13:19, Adam Sobieski wrote:
> David,
> 
> Thanks. I saw an attribute predicate in an animation (I thought is was a
> derived attribute); I'm reading about attributes and predicates.
> 
> For the example, it might make sense for an issuer to issue electoral
> districts onto a credential, if we desire the capability for anonymous
> feedback to elected officials and if the elected officials desire to
> know that a feedback-provider is from an electoral district.

Yes indeed. This would be a suitable credential for (in the UK case) a
local authority to issue to a resident

regards

David

> 
> 
> Best regards,
> Adam
> 
> *From:* David Chadwick <mailto:D.W.Chadwick@kent.ac.uk>
> *Sent:* ‎Wednesday‎, ‎August‎ ‎23‎, ‎2017 ‎5‎:‎43‎ ‎AM
> *To:* public-credentials@w3.org <mailto:public-credentials@w3.org>
> 
> Hi Adam
> 
> since credentials are signed by issuers, then I do not believe a
> repository can implement a derived attribute, as a repository is not
> usually a trusted issuer. I suggest the issuer will issue this if
> requested to by the subject.
> 
> regards
> 
> David
> 
> On 22/08/2017 21:51, Adam Sobieski wrote:
>> Credentials Community Group,
>>
>> I would like to ask about /derived attributes/ (e.g. over 21 which is
>> derived from birthdate and the current date), about how they are
>> implemented by credential repositories towards understanding whether
>> more complex derived attributes such as electoral districts might be
>> possible.
>>
>> Electoral districts (https://en.wikipedia.org/wiki/Electoral_district)
>> are dynamic regions. A digital wallet might inquire to a remote service
>> about how an address or location maps to an electoral district (e.g.
>> https://developers.google.com/civic-information/)
>>
>> Cities, states and electoral districts could be useful for government
>> feedback forms, recording audio messages for or writing letters to
>> Congresspeople via websites.
>>
>>
>> Best regards,
>> Adam Sobieski
>

Received on Wednesday, 23 August 2017 12:46:46 UTC