SV: [RDF] Queries, filters, context, trust, and more.., part 2

[Stefan Andersson]

> Here are a couple of things to add to the feature list: Versioning,
> authorization and trust.

Yay!
=20
> Let's say that the person has a lot of phone numbers. =20
>=20
>  - A person could say that the number has changed.  The request =
should
>    retrieve the latest number rather than the old incorrect number.
>=20
>  - If the person stating that the number has changed is untrusted, we
>    should instead retreive the previous number.

Actually - this is a case where a change in current affairs is =
definitive.
If I change my telephone number, I wouldn't want anybody to use my old
number, which now goes to some other poor soul.

I think that there are classes of changes. Something like:
* This is a correction of an erroneous fact. The past fact has never =
been
correct. (I stated it, though. And that could be a relevant fact.)
* This is an update. The past fact was correct, but as from now, the =
new
fact will be valid. It is a new version with respect to _time_.
* This is a total change or addition. The past fact and the new has =
nothing
to do temporally with each other. It is a new version with respect to
_function_

An example:
Case 1:
I have phone number A. I kill it. I have no phone. Then I have a new =
phone
number B.
Case 2:
I have phone number A. I add a new number B. Now I have two phone =
numbers.
Then I kill phone A.
Case 3:
I have phone number A. I let the phone company change it inte phone =
number
B.
Case 4:
I have phone number B.

Now. The factual representation of all the (in the end) equivalent =
cases
will (most probably) be different. And think thru what happens when you
query the cases at different points...

I think there is an implicit _intentional_ layer on top of this. There =
is a
difference between these cases, not only in how far apart the actions =
are.

>  - If the previous number is restricted, we would have to accept the
>    later untrusted number.  But we could also try to convince the
>    service that we are authorized to recieve the restricted
>    information.

This is the concept of inter-process _interaction_ - I'm currently =
working
on getting small, relatively dumb, mobile thingies act more intelligent =
by
means of _interacting_ with smarter, bigger, stationary thingies.

/Stefan

Stefan Andersson
Ullman Communications
Johannebergsgatan 30
412 55 G=F6teborg

Tel: +46-31-708 26 13
Mail: stefan.andersson@ullmans.com