Contains codesystems and valuesets as determined by NIHDI (RIZIV/INAMI), e.g. in the document https://www.inami.fgov.be/SiteCollectionDocuments/instructions_facturation_electronique.pdf . These CodeSystems and ValueSets are most likely to be replaced by international standard terminologies, such as SNOMED CT, LOINC, UCUM, and the like...