Now that HL7 is bringing back the OID, as CDA can only handle OIDs and not URL system values. I went and registered with iana for my own OID. It is not important to do this, but it is free. Now all of the test IGs that I have in my personal github can have their own OID root so that I don't need to constantly indicate in the ignorewarnings.txt that it is okay that my test IGs don't have OID assignments.
My assigned OID root: 1.3.6.1.4.1.66281
I have been using the official example OID root: 2.999; which is the equivalent of the DNS example.com, or example.org. I have used this 2.999 OID root with the IG publisher, which I felt was an appropriate defiance. Unfortunately, it just changes the warning.
I have a page that I refer to often on creating and using Unique IDs - UUID - OID
On that article I did add comments that explained the 2.999 OID root. -- https://oid-base.com/get/2.999
I have also noted that USA SSN has reserved those SSN numbers starting with 666. I have not seen an official statement to this, but plenty of confirmations. The concept is that they know they can't issue a 666. number to someone as that someone would see it as the USA government labeling them with the mark of the devil. So when I make test patients, I give them SSN starting with 666-.
