# description
 The closeness or quality of the mapping between the HL7 concept (as represented by the HL7 concept identifier) and the source coding system. The values are patterned after the similar relationships used in the UMLS Metathesaurus. Because the HL7 coding sy

# concept[].definition
The first concept is at a more abstract level than the second concept.  For example, Hepatitis is broader than Hepatitis A, and endocrine disease is broader than Diabetes Mellitus.  Broader than is the opposite of the narrower than relationship.

# concept[].definition
The two concepts have identical meaning.

# concept[].definition
The first concept is at a more detailed level than the second concept.  For example, Pennicillin G is narrower than Pennicillin, and vellus hair is narrower than hair.  Narrower than is the opposite of broader than.