NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM STORING PROPERTY CONTROL PROGRAM, PROPERTY CONTROL METHOD, PROCESSING APPARATUS AND SYSTEM FOR CREATING COMMON FILE

A processing apparatus and plural terminals are connected by a communication network. On receiving local data from one of the terminals, a controller of the processing apparatus extracts properties of one or more objects from the local data, compares each property extracted from the local data with a common property and determines whether to keep or change the each property. If the extracted property is the same as the common property, the controller keeps the property as it is. Otherwise, the controller determines whether to keep the individual property which differs from the common property as it is or to change the individual property to the corresponding common property, in accordance with whether the individual property meets a predetermined criterion. Using the determined property, the controller writes each of the one or more objects of the local data into the common file, and stores the common file.