This is a synonym for disjunction.
An operator used to assert that at least one of two (or more) parts of a concept definition or expression constraint must be true.
Disjunction can be represented by theOR operator. A disjunction of A with B , means that either A OR B must be true.
Disjunction gives the same result as an UNION between the set of concepts or expressions for which A is true and the set of concepts or expressions for which B is true.
The following expression constraint is satisfied by clinical findings that are subtypes of either OR .
< OR <