Code

The use of codes to specify meaning within clinical data is ubiquitous. CQL therefore supports a top-level construct for dealing with codes using a structure called Code that is consistent with the way terminologies are typically represented.

Field	Card.	Type	Description
system	1..1	String	The identifier of the code system.
code	1..1	String	The identifier for the code.
display	0..1	String	A description of the code.
version	0..1	String	The version of the code system.