While I was looking at the UV Ingredient template for med mixtures again, I noticed that the pharm:quantity element supposedly has numerator and denominator elements in the cda} namespace. However, maybe this is just my lack of familiarity with ART-DECOR, but I haven’t been able to figure out what this namespace is actually supposed to be—more specifically, is it the same urn:hl7-org:v3 namespace that everywhere else in the template just refers to as hl7? If so, is there a reason for it to be called something different here?

More broadly, I guess it’s a little unusual that we use pharm:code instead of hl7:code but then use cda:numerator and cda:denominator. Maybe there was a good reason for that, though, and it also might not be worth changing now.