When a user issues IDENTIFY, the system returns an ID and establishes an association between the ID and the user's task. All data-in-virtual services for a specific ID must be requested by the task that issued the IDENTIFY and obtained the ID.
Any task can reference or change the data in a mapped virtual storage window, even if the window was mapped by another task, and even if the object was identified and accessed by another task. Any task that has addressability to the window can reference or change the included data. However, only the task that issued the IDENTIFY can issue the SAVE to change the object.
When more than one user has the ability to change the data in a storage area, take the steps necessary to serialize the use of the shared area.