Re: Constraint V Refinement

Hi,

I agree on the fact that we need a formal interpretation of the meaning of refinement and constraint!-)


The fact that the delivery channel is a property of the action or a property of the asset depends on the application-dependent ontology that we want to use for representing the class of actions regulated by the policy.


My intuition is that a video has not the property deliveryChannel.

But for example the VideoObject class in Schema.org https://schema.org/VideoObject has the genre property that can be used to express the broadcast channel!

Unfortunately, in Schema.org there is not a StreamAction class (but there is the WatchAction class with the service provider property).


Regards

Nicoletta









________________________________
Da: Víctor Rodríguez Doncel <vrodriguez@fi.upm.es>
Inviato: giovedì, 7 aprile 2022 16:20:27
A: public-odrl@w3.org
Oggetto: Re: Constraint V Refinement

Hi,

I do not see a great difference between refinement or constraint because its interpretation is not defined (cf. examples in a testbed where an algorithm must behave differently in each case), therefore the difference is only philosophical to me. And even in this case unclear: I would have said constraint, though, for the deliveryChannel, and if refinement, refinement of the action (this would be like an "adverb" modifying the action rather than an "adjective" qualifying the asset)

Regards,
Víctor

> Is the deliveryChannel a refinement on ‘stream’ or a constraint on the rule?

refinement on the asset i.e. the video itself? e.g., => "you can stream (action) videos whose deliveryChannel is YouTube (asset with deliveryChannel == YT)

br, simon

On Thu, 7 Apr 2022 at 02:42, Renato Iannella <r@iannel.la<mailto:r@iannel.la>> wrote:

Hi all, we generally define the constraint property as a “condition on the rule” and the refinement property as “narrow the semantics of the action”.

So, for example temporal and geospatial conditions apply to the rule, and printing at most 5 times is a refinement to print.

My question is how to interpret this difference with other use cases, such as:
 - you can stream (action) a video (asset)  on YouTube (deliveryChannel) only?

Is the deliveryChannel a refinement on ‘stream’ or a constraint on the rule?

Thanks…Renato



--
Víctor Rodríguez-Doncel
D3205 - Ontology Engineering Group (OEG)
Departamento de Inteligencia Artificial
ETS de Ingenieros Informáticos
Universidad Politécnica de Madrid

Campus de Montegancedo s/n
Boadilla del Monte-28660 Madrid, Spain
Tel. (+34) 910672914
Skype: vroddon3
http://cosasbuenas.es

Received on Friday, 8 April 2022 08:17:22 UTC