On 9 August 2017 at 21:45, Richard Wallis <richard.wallis@dataliberate.com> wrote: > Hi Jacob, > > There are no cardinality constraints on Schema.org properties so you can > omit them or repeat them as required. > Indeed, we have no formal expression of cardinality constraints. However, in a few situations there is a natural commonsense reading where you might expect there to be only one natural value for a given property - e.g. birthDate or deathDate of a Person. You might legitimately write the same date twice in slightly different ISO-8601 forms, although that is unlikely to be very helpful. Commonsense goes a long way, here... Dan
Received on Monday, 14 August 2017 09:54:49 UTC