(1) A means of grouping committable resource operations to allow either the processing of a group of committable resource changes as a single unit through the Commit command, or the removing of a group of committable resource changes as a single unit through the Rollback command.
(2) A way of grouping file operations that allows the processing of a group of database changes as a unit or the removal of a group of database changes as a unit. See also roll back.