This chapter provided an introduction to sensor data type design using a very simple example: the hackyDoc_SimpleSdt class. For examples of more sophisticated SDT designs, see the implementation of the public hackySdt modules.

Finally, note that the most useful design for a sensor data type does not occur in isolation. Sensor data types are the bridge between the client-side sensors that collect data about product and process, and the server-side analyses, which make interpretations and abstractions based upon this data that help developers to improve the quality and productivity of their work. Consider the needs of both sensors and analyses as you develop your sensor data types.