HL7® Clinical Information Model Initiative

Class OrdinalConcept

Represents rankings and scores, e.g. pain, Apgar values, etc, where there is a) an implied ordering, b) no implication that the distance between each value is constant, and c) the total number of values is finite. This class can be used for recording symbolic values, e.g., the results on a urinalysis strip {neg, trace, moderate, ...} or numbers like Agar values {0, 1, 2, 3, ...}. Note that although the term "ordinal" in mathematics means natural numbers only, here any integer is allowed, since negative and zero values are often used by medical professionals for values around a neutral point, for example {-3, -2, -1, 0, 1, 2, 3} for reflex response values.