The set of elements that are members of both of two specified sets.
In set theory, the intersection of sets ** A** and B refers to all elements that are in both set A and set B.
In SNOMED CT, the intersection of two _subsets _of concepts consists of all concepts that are members of both subsets.
The following expression constraint language defines the set of concepts that in the intersection subtypes of and members or the . The "AND" instruction indicates a union between the sets defined by constraints on either side of that instruction.
< AND ^
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