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beperking met twee elementen (A constraint that applies to two elements, such as two classes or two associations. The constraint is shown as a dashed arrow from one element to the other, labeled by the constraint string in braces ({ })) |
2 : 7 phrases in 6 subjects |
Agriculture | 1 |
Communications | 2 |
Earth sciences | 1 |
Environment | 1 |
Information technology | 1 |
Medical | 1 |