UML with MetaUML

oswald.mp

input metauml;
beginfig(0);

% class
Class.Object("Object")
    ("+name : string")
    ();

Class.Animal("Animal")
    ()
    ("#say_hi() : void");

Class.Plant("Plant")
    ()
    ("#say_hello() : void");

Class.Octopus("Octopus")
    ("+hands : integer")
    ("#sing() : void");

Class.Dog("Dog")
    ("+tail : integer")
    ("#bark() : void");

Class.Penguin("Penguin")
    ()
    ("+ play() : void");

Class.Flower("Flower")
    ()
    ("+ roller_state() : void");

Class.Egg("Egg")
    ("+brother : object")
    ("+ say_yes() : void");

Class.Snowman("Snowman")
    ()
    ("+ walk() : void");

% position
topToBottom(30)(Object, Plant);
leftToRight(20)(Animal, Plant, Egg, Snowman);
topToBottom(30)(Animal, Dog);
leftToRight(20)(Octopus, Dog, Penguin, Flower);

drawObjects(
    Object, Animal, Plant,
    Egg, Snowman, Octopus, Dog, Penguin, Flower
);

% connection
clink(inheritance)(Animal, Object);
clink(inheritance)(Plant, Object);
clink(inheritance)(Egg, Object);
clink(inheritance)(Snowman, Object);

clink(inheritance)(Octopus, Animal);
clink(inheritance)(Dog, Animal);
clink(inheritance)(Penguin, Animal);

clink(inheritance)(Flower, Plant);

endfig;
end.