Figure 18, 19, 20: Block, Part, Generalization, Redefinition.

model A
  B b1;
end A;
model B
end B

Export of block A to Modelica from the MagicDraw SysML Plugin or Magic Cyber-Systems Engineer ^® (Cameo Systems Modeler^®) gives:

model A
  A _A;
  model A
    B b1;
  end A;
  model B
  end B;
end A;

---

model A
  C c1;
end A;
model B
  extends A;
end B;

Export of block B to Modelica from the MagicDraw SysML Plugin or Magic Cyber-Systems Engineer ^® (Cameo Systems Modeler^®) gives:

model B
  B _B;
  model B
    extends A;
  end B;
  model A
    C c1;
  end A;
  model C
  end C;
end B;

Note that this additionally includes the full declaration of C.

---

model A
  replaceable C c1;
end A;
model B
  extends A;
  redeclare D c1;
end B;

Export of block B to Modelica from the MagicDraw SysML Plugin or Magic Cyber-Systems Engineer ^® (Cameo Systems Modeler^®) gives:

model B
  B _B;
  model B
    extends A(redeclare D c1);
  end B;
  model A
    replaceable C c1;
    Real v1;
    discrete Real v2;
    parameter Real v3;
  end A;
  model D
    extends C;
  end D;
  model C
  end C;
end B;

Note that this additionally includes the full declaration of C and D.