Here’s a question for you medical professionals - and specifically paramedics:
I want to encode my blood type and rhesus in the vCard on my implant, in the NOTE field, in a way that’s fairly obscure/unintrusive for people to whom I give my vCard for the purpose of exchanging phone number and email address, yet at the same time immediately obvious for any first aid responder who might happen to scan it while I’m unconscious (unlikely, but let’s assume).
I’ve been looking around on the internet to try and figure out if there’s a standardized way of encoding that information, but I’ve come up dry. Apparently every medical tag manufacturer encodes it any which way they want. However, while the meaning is kind of obvious on a medical tag, it might not be so obvious in a vCard, mixed with other unrelated bits of information.
So in the end I’ve adopted a variation of the format used on the Canadian armed forces’ dog tag. I’ve encoded “AB/Rh/-” on my implant. If you saw that in the “About this person” field of a cellphone contact coming from an NFC implant, would it be obvious to you? If not, what would be a better way of encoding it?