The set of elements that are not in a specified set.
Notes
- In set theory, the complement of set A refers to all elements not in set A.
- In SNOMED CT, the complement of a subset of concepts consists of all concepts that are not in that subset.
Example
The following expression constraint language defines the set of concepts that are subtypes of 442083009 | Anatomical or acquired body structure| that are also part of the complement of the 723264001 | Lateralizable body structure reference set| . The "MINUS" instruction excludes members of the reference set, so only concepts that are part of the complement of that set are included.
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