Through data-in-virtual, your program can map a data-in-virtual object to a data space. The data-in-virtual object must be a VSAM linear data set. Use DIV macros to set up the relationship between the object and the data space. Setting up the relationship between the object and the data space is called "mapping". In this case, the virtual storage area through which you view the object (called the "window") is in the data space. The STOKEN parameter on the DIV MAP macro identifies the data space.
The task that issues the DIV IDENTIFY owns the pointers and structures associated with the ID that DIV returns. Any program can use DIV IDENTIFY; however, the system checks the authority of programs that try to use subsequent DIV services for the same ID.
