I am running a report similar to TMEDSN01 about tapes in the TMC looking at values for the WORM_IND field in the EARLDEFS copybook. Running the report shows the following values of I, N, V, & Y. It is my understanding that a value of Y would indicate that the tape volser is a WORM tape and a value of N would indicate that the tape volser is not a WORM tape. What do the values of I and V indicate?