I think this is a good set, but I am wondering why it is specific to bacteriology as any test requiring a sample could have this information. I would try to align concepts around specimen and specimen source to be similar to what we do for HL7… that there is a specimen type (urine, fluid, tissue) and a source location (anatomical site). Does the set of sets work where “additional attributes” is another partially defined set? Could there be more of a generic results set and then add a few bacteriology concepts as a modular set? Then you could simply append or replace that set with other sets for different tests (pathology, chemistries, etc.)?