“Human height or stature is the distance from the bottom of the feet to the top of the head, standing erect. … Growth has long been recognized as a measure of the health of individuals” – Wikipedia. This class represents the measurement (or “clinical observation”) of the patient’s Height. This class re-defines the generic clinical Observation class to fix the observed characteristic to LOINC 8302-2 and to set the data type of the observation value to a Physical Quantity. "Height (in inches) measured by standing.... Decimal precision is permissible." - PCORnet Common Data Model, Vital.HT