I would like to request a few additional codes for the Observation.category. There are three situations I would like to see; (1) Test data, (2) Demo data, (3) calibration data. All three of these Observation reports could look identical to real physiological data and without some means of distinguishing 'fake data' from 'real data' there would be no way for a reader application to know. The amount of test data and demo data is probably unusually high right now due to all the testing going on.

Nevertheless, the results of a study grabbing all vital signs measurements (one reason for having the LOINC vital signs magic codes) could be seriously comprimized if it includes the 'fake' data along with the real data. Adding these codes would solve this potentially serious problem.