Name Flags Card. Type Description & Constraints doco
. . Count Σ I Quantity A measured or measurable amount
+ There SHALL be a code with a value of "1" if there is a value and it SHALL be an expression of length. If system is present, it SHALL be UCUM. If present, the value SHALL a whole number.
Elements defined in Ancestors: id, extension, value, comparator, unit, system, code

doco Documentation for this format