uml/associations.md

@@ -4,17 +4,22 @@
 An Association classifies a set of tuples representing links between typed instances, e.g., two instances of classes at runtime.
 
 ## Example
-![Binary Association Class Diagram](https://git.informatik.uni-kiel.de/ag-se/teaching-public/wikis/uml-sources/img/binary-association.png)
-
-# Aggregation vs Composition
+![Association Class Diagram](https://git.informatik.uni-kiel.de/ag-se/teaching-public/wikis/uml-sources/img/association.png)
 
+# Aggregation and Composition
 Aggregation and Composition are subsets of associations meaning they are specific cases of association.
-In both aggregation and composition object of one class "owns" object of another class. But there is a subtle difference:
+In both aggregation and composition object of one class "owns" object of another class. But there is a subtle difference.
 
-* Aggregation implies a relationship where the child can exist independently of the parent. Example: Lecture (parent) and Student (child). Delete the Lectureand the Students still exist.
+## Aggregation
+Aggregation implies a relationship where the child can exist independently of the parent. Example: Lecture (parent) and Student (child). Delete the Lectureand the Students still exist.
 
-* Composition implies a relationship where the child cannot exist independent of the parent. Example: House (parent) and Room (child). Rooms don't exist separate to a House.
+### Example
+![Aggregation Class Diagram](https://git.informatik.uni-kiel.de/ag-se/teaching-public/wikis/uml-sources/img/aggregation.png)
 
-## Example
+## Composition
+Composition implies a relationship where the child cannot exist independent of the parent. Example: House (parent) and Room (child). Rooms don't exist separate to a House.
+
+### Example
 ![Composition Association Class Diagram](https://git.informatik.uni-kiel.de/ag-se/teaching-public/wikis/uml-sources/img/composition.png)
 
+The example contains a class person (parent) with the (child) classes head, leg, and heart.
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