# property[].description
Indicates that the code is abstract - only intended to be used as a selector for other concepts

# property[].description
A property that indicates the status of the concept. One of active, experimental, deprecated, retired

# property[].description
The date at which a concept was deprecated. Concepts that are deprecated but not inactive can still be used, but their use is discouraged

# property[].description
The concept identified in this property is a child of the concept on which it is a property. The property type will be 'code'. The meaning of parent/child relationships is defined by the hierarchyMeaning attribute

# concept[].definition
The week with the month's first Thursday in it (analagous to the ISO 8601 definition for week of the year).