Including XML and RDF doesn't bother me. A lot of people greatly prefer JSON over XML. I don't get exorcised either way. The final two look like problems. I wou

Including XML and RDF doesn't bother me. A lot of people greatly prefer JSON over XML. I don't get exorcised either way. The final two look like problems. I would guess the penultimate one is because most medical systems ignore time zone so you just assume it happened in the time zone of the system of origin. It probable doesn't matter often in practice. If two different patients had a lab test done on opposite sides of the world would that knowledge ever be important? On the other hand, time is important within a patient data set. This might be a problem if a patient radically changed time zones within the course of a day. I can see it being inconvenient for import into a better designed system. You'd have to make an assumption about time zone.