Validator: Required property @id is missing from ScheduledSession.

[drinkynet]

Its possible to not set the @id for an RpdeItem when building an RpdeBody. The validator then flags an error that it is missing when you validate the feed.

It may aid development if a RuntimeException was thrown if the field is missing so you can pick it up in development before you get to the validator stage.

[nathansalter]

Yes, we should add something into the RPDE validation process to check that IDs are set for all items.