CONFIRM_UPDATE
Use
This method is called in conjunction with UPDATE_WITH_URL.
It must always be called if storing via the URL was successful. If it was not successful, the administration data should be deleted using DELETE.
The application object (document set) is identified by the attributes described in the section Parameters.
In addition, this method is specified by the following parameters:
So this method is like method CONFIRM_CREATE, except that it concerns updating and not creating documents.