An attribute whose value applies to all systems is global in scope. An attribute whose value applies on a per-system basis is local in scope. The at operator (@) indicates the system to which a local value applies.
An example of local attributes can be found in the following resource type where IP addresses and routing options are assigned per machine.
MultiNICA definition for HP-UX
Device@sysa = { lan0 = "166.98.16.103", lan0 = "166.98.16.103" }
Device@sysb = { lan0 = "166.98.16.104", lan0 = "166.98.16.104" }
RouteOptions@sysa = "default 166.98.16.1 1"