Yeah... This kind of overly defensive and dismissive response is precisely the reason that HIPS exists, and why MHR gave up on speaking with the standards bodie

Yeah... This kind of overly defensive and dismissive response is precisely the reason that HIPS exists, and why MHR gave up on speaking with the standards bodies. The complaints by a federal project are a serious concern, and so are edge cases that they hit, because HL7 seems to have more edges than a razor blade. MHR is five years old. These problems do not get resolved over time. An undecidable FHIR is a problem in practice, because that's where it was discovered to be a problem. It's not a defect that gets resolved because a few vendors implement software that gets widely used - it's a defect because it'll get resolved differently between those vendors. A data format should be a regular language. HIPS exists so that the MHR devs don't have to see a single HL7 document of any kind - because the formats are awful, in every possible way. I'm sorry, but I have nothing good to say about working with HL7, both the standards and the working groups.