# description
Permitted data type for observation value.

# concept[].definition
A coded concept from a reference terminology and/or text.

# concept[].definition
A set of values bounded by low and high.

# concept[].definition
A ratio of two Quantity values - a numerator and a denominator.

# concept[].definition
A series of measurements taken by a device.

# concept[].definition
A time during the day, in the format hh:mm:ss.

# concept[].definition
A date, date-time or partial date (e.g. just year or year + month) as used in human communication.

# concept[].definition
A time range defined by start and end date/time.