This resource entry creates an execution alias named, StartDtterm, which starts a terminal emulator. The & (ampersand) starts the command in the background.
Dtterm.executionAlias.StartDtterm: dtterm &
This entry creates an alias named, xclockAlias, that executes the xclock application in an application named NightAlert.
NightAlert.executionAlias.xclockAlias: xclock &