t20d.use

UML设计测试工具

model t20

class A
end

class B < A
end

class C < A
end

class F < B,C
end

class D
end

association assoc1 between
  C[*] role rc
  D[*] role rd
end

association assoc2 between
  B[*] role rb
  D[*] role rd
end