/sys$common/syshlp/helplib.hlb DTM, DELETE, VARIABLE, Example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   DTM> DELETE VARIABLE INPUT_FILE "Deleting variable INPUT_FILE"
   Confirm deletion of variable INPUT_FILE [Y/N] (N): y
   %DTM-S-DELETED, variable INPUT_FILE deleted.
   DTM>

   This example deletes the variable INPUT_FILE. The default
   /CONFIRM qualifier is in effect.