Tools > Combine Reference Sets…
menu or by right-clicking on a Simple type Reference Set and selecting Combine Reference Sets.A U B
A Ո B
A-B - A\B
B-A - B\A
(A\B) U (B\A)
Next
button. To complete the operation, the Preferred Term for the new combined Reference Set needs to be set on the last wizard page.Finish
button and the new Reference Set is created and its editor opens automatically.