Device Taxonomy

We need to do some work on the device database and model. Analyze the real world, find entities, generalize, abstract, rinse, repeat.

         Device
         /    \
   Actuator    Sensor
    /             \
   ?               ?

Potential sources:

http://www.xapautomation.org/index.php?title=Schema

http://wiki.xplproject.org.uk/index.php/XPL_Message_Schema