Device classes (initial vocabulary)

thermocycler, liquid_handler, robot_arm, microscope, plate_reader, centrifuge, incubator, hotplate, balance, pump, valve, spectrometer, laser, stage, cnc, 3d_printer, oven, power_supply, camera, generic.

A class is a hint for the agent and a namespace for conventions (a robot_arm SHOULD have a locations map; a microscope SHOULD expose an acquire action returning an image URI). Classes are not enforced by the protocol.