In the verification messages, what is the difference between 'missing' and 'empty'?
In the verification messages returned, there is a difference in the scope of the term 'missing' and 'empty'. 'Missing' indicates that the particular XML element is missing entirely from the sequence listing and is mandatory to include. 'Empty' indicates that the XML component is there but that there is no value provided, when one is mandatory. It is important to understand the difference in order to resolve the problem reported.