The Dutch education system adds a major or minor to their Higher professional education or University education? I saw some examples as: HBO Management (would HBO be the degree and Management the major, or HBO Management is the degree). I am doing a comparison with the US education system.
(As mentioned in the comments) It is possible to do a minor while at university in the Netherlands - for example, on the Biology course of Radboud University, it is possible to do 15-30 ECTS on a minor subject.
This website gives more information about higher education in the Netherlands, but you can confirm for yourself by looking at the course descriptions at other universities.