[Odrl-version2] resumption of containers & model update
Susanne Guth
Susanne.Guth at gmx.net
Mon Jan 30 20:17:14 EST 2006
Hi Renato,
I agree, we have to make this clear:
What about distinguishing the following cases:
Case 1.) Either permissions OR (exclusive) prohibitions are allowed: In this
world we can follow our former spec, saying
"Permissions are what you are allowed to perform on the target **and
nothing else**"
"Prohibitions are what you are NOT allowed to perform on the target **but
everything else** is allowed."
Case 2.) Permissions AND Prohibitions are allowed: In this world we could
state:
"Permissions are what you are allowed to perform on the target **and
nothing else**"
"Prohibitions are what you are explicitly NOT allowed to perform on the
target **and anything else is still not allowed."
With this second case, we could cover the CC licenses, I think. Don't we?
+++++++++++++++
With this, we treat Prohibitions under certain conditions differently. Is
that problematic? Vicky? If we run into troubles, then I would suggest to
only go with solution/case 2.
So long
Susanne
>
> Thanks Susi - I like the update!
>
> > 2.) I kept prohibitions as they were. However, this issue need further
> > discussion. The important question is if we can formalise the model
> > with
> > prohibitions in it... vicky I count on you here :)
>
> We also need to be able to express the semantics of Permissions/
> Prohibitions in the
> (less formal) Model. In particular, the conflict that arises when
> both are used in
> a single expression (or expressions that are merged/inherited...)
>
> In the current V2 Model, we only say that Permissions are what you
> are allowed to
> perform on the Target, and Prohibitions what you are not.
>
> Remember in V1.1 we said that Permissions are what you are allowed to
> perform on
> the target **and nothing else** - that last bit is the important
> difference.
>
> a) Consider the following:
> Permission = Display
> Prohibition = Print
>
> The person can display the target but not print it.
>
> What about editing? It certainly does not say I can't do it.
> But it does not say that I can either.
>
>
> How can we define the semantics of Permissions/Prohibitions so that
> when they
> both appear, it is clear what they both mean?
>
> Perhaps we need a way to indicate if they represent a "closed set" of
> actions?
>
> Cheers... Renato
>
>
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--
Susanne Guth
susanne at odrl.net
ODRL Initiative
http://odrl.net/
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