16. Which one of the following XML content models is NOT allowed?
<!element Customer (Name, Ship-to-address?, Bill-to-address?)>
<!element Customer ((Name, Ship-to-address) | (Name, Bill-to-address))>
<!element Customer (Name, (Ship-to-address | Bill-to-address)?)>
<!element Customer (Name, (Ship-to-address, Bill-to-address)?)>
The
test says the answer is b.
b should be allowed along with all other selections.
Can anyone confirm this? I apologize if this has been discussed previously.