[Odrl-version2] RE: ODRL-Version2 Digest, Vol 9, Issue 7
Renato Iannella
renato at odrl.net
Tue Aug 30 13:24:38 EST 2005
On 29 Aug 2005, at 22:58, Vicky Weissman wrote:
> Can you give some examples of what you'd want to do with the "and"
> and "or"
> constraint containers? Do you remember which solutions were
> proposed and
> what people didn't like about them?
>
>
>
>
In V1.1, we had an explicit XML container mechanism that allowed you
to say
that you have Permission X <or> Y (not both) - by default, all
Permissions
were and-ed. This container was a bit messy.
There seems to be 3 alternatives:
1 - Put all the <or> options into separate Offers
2 - Link the alternate Permissions as Prohibitions - that is - You
are Permitted
to do X and Y, but you are Prohibited to do X if you have done Y
(and vice versa)
3 - Keep the <or> structure in the V2 model
> Suppose that the Cornell library signs an agreement with the ACM. The
> agreement is that any member of the Cornell community (student,
> faculty, or
> staff) can print any ACM article up to 5 times. Could such an
> agreement be
> written in ODRL? If the answer is yes, what happens to next year's
> incoming
> class? At the time the agreement was made, they were not members
> of the
> Cornell community nor were their identities known, but intuitively
> they
> should be able to make copies once they join Cornell. With this
> example in
> mind, I think membership should be determined at the time a request
> is made
> (e.g., when Alice asks to copy an ACM article) and not assumed to
> be known
> when the agreement is signed. What do you think?
>
>
>
>
Yes. This is were a REL and an access control language differ. A REL
should express the
policy (ie any member of Cornell), and a "system" needs to
dynamically check the
access credentials to ensure the Policy is Ok.
> I would like to create an algorithm that can be used to determine
> whether a
> set of ODRL licenses imply a permission, but I might not get to
> this for
> awhile because of other commitments. Is there a particular date by
> which you
> need to have this for it to be considered for the new release or
> should I
> just get to it as soon as possible?
>
>
>
>
Whenever you can Vicky!
Cheers
Renato Iannella
ODRL Initiative
http://odrl.net
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