<packagedElement xmi:type="uml:Package" xmi:id="_mgDgMLIqEemXwfLFUQ7Icw" name="Diagrams">
<ownedComment xmi:type="uml:Comment" xmi:id="_3RaHELI2EemXwfLFUQ7Icw">
<body>Cat knows about the tree, and the tree knows about the cat (bidirectional)</body>
</ownedComment>
<ownedComment xmi:type="uml:Comment" xmi:id="_AruscLI3EemXwfLFUQ7Icw">
<body>Cat can reference the mouse, but the mouse cannot reference the cat (unidirectional).
Mouse can exist without the cat (aggregation)</body>
</ownedComment>
<ownedComment xmi:type="uml:Comment" xmi:id="_0mrIsLJCEemB2NQhqBtZnA">
<body>Dog knows about the toy, but the toy does not know about the dog.
-
A composition (Toy cannot exist without the dog)</body>
</ownedComment>
</packagedElement>
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