Optimize complete set requests
Sometimes, when our clients do not make any changes in a partner's system for a longer period of time e.g. a year, we don't know whether the data is still up to date or not.
As the specification states, we could already respond to a message with a request for a complete set but the problem occurrs when we don't get any requests at all.
We would like to discuss if it makes sense to introduce a new kind of ping message that contains the latest modification date so that the server knows that there hasn't been any comunication problems. Another idea could be that the partner exposes a endpoint which allows the server to send the client a request for a complete set. We prefer the first approach as the second one doesn't seem to be a viable solution.