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Evidence Duties #10

Closed benedictws closed 3 years ago

benedictws commented 4 years ago

Sometimes a party to an agreement must provide information about their activities to the other party. The example that comes up in market data licenses is evidence of controls - i.e. what access control strategies are being applied to the data.

The difficulty in modeling this is that this duty always holds - it can never be fulfilled and finished with. The assigner can at any moment request this evidence of the assignee. Fulfilling the request does not discharge the duty; the assigner can always ask again.

So it's probably best modeled as a duty that is activated by a notification. The assigner can notify the assignee as often as they wish, and the assigner must provide the evidence every time. The assigner's duty is activated by the request.

This is a pattern we see in consent duties (requires notification) and payment duties (requires invoicing).

benedictws commented 4 years ago

The duty to evidence controls looks so:

:O3                 a                   odrl:Duty ;
                    nl:creditor         <https://permid.org/1-4295899615> ; # CME
                    odrl:action         [   a                   md:Evidence ;
                                            md:actionScope      md:Controls ;
                                            odrl:count          "1"^^xsd:int
                                        ] ;
                    odrl:duty           :D10 .

Where the duty :D10 is the activating request:

:D10                a                   odrl:Duty ;
                    nl:debtor           <https://permid.org/1-4295899615> ; # CME
                    odrl:action         [   a                   md:Notify ; 
                                            odrl:count          "1"^^xsd:int
                                        ] .
benedictws commented 4 years ago

Above I'm using the action "evidence" - i.e. provide evidence of the controls applied. This wording can be seen in the CME license. But is this really different to "report" - i.e. report on the controls applied?

We already have the concept "report" - see Issue 7 . Do we need this additional concept: "evidence"? Is there a useful distinction here to be made between the two?