XXX The BitKeeper executable. The command line for fetching source files using BitKEeper. The string displayed when fetching a source file using BitKeeper. If this is not set, then &cv-BITKEEPERCOM; (the command line) is displayed. The command (&cv-BITKEEPER;) and subcommand for fetching source files using BitKeeper. Options that are passed to the BitKeeper get subcommand.