Re: [poe] isNeccessaryFor

Re POE-UC-19 ...:

- C1 Left Operand [Event](http://w3c.github.io/poe/vocab/#term-event):
 does not fit by its definition "_An identified **event at which** the
 Action may be exercised._" By that definition the right operand must 
be an identifier for an event - e.g. for the 2014 FIFA World Cup 
https://www.wikidata.org/entity/Q79859 
- C2 Left Operand [Action Date Time or 
Period](http://w3c.github.io/poe/vocab/#term-dateTime) is defined as 
"_The date (and optional time and timezone) to be compared to the time
 when the Action is exercised or **a period to be compared with the 
duration of exercising the Action**._" This definition sets as option 
a period **in which and not after wich** the Action may be exercised -
 e.g. odrl:lteq and P30M defines: for max 30 minutes. That's why I 
proposed the new Action Delay Period Left Operand to cover that use 
case.
- re "has to happen first": right, by a formal view that means that 
only after the event has closed C1 will deliver a "satisfied" result. 
And that's why I propose to have a relationship: "wait until the 
constraint of the left operand delivers a satisfied, only after that 
evaluate the right operand constraint and the point in time of 
receiving a "satisfied" result is a reference point in time for a 
temporal Left Operand of the right operand constraint" ...
- ... and I share your view that this Constraint Relation operator 
works only with time driven/related constraints.
- (another round of musing about its name: c1 odrl:isSatisfiedBefore 
c2 ?)

Could we take a step in this direction?


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Received on Friday, 3 February 2017 08:46:31 UTC