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| - There are a four distinct ways that part-whole relationships can be specialized within the core, shown in Figures 3 - 6. The first specialization, shown in Figure 3, describes composites that contain at least one part. As shown, all __NonEmptyComposite__ objects are connected to at least one part object. |
| + There are five distinct ways that part-whole relationships can be specialized within the core, shown in Figures 3 - 7. The first specialization, shown in Figure 3, describes composites that contain at least one part. As shown, all __NonEmptyComposite__ objects must are connected to at least one part object. |
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| - The second specialization, shown in Figure 4, describes inserperable parts. As shown, all __InserperablePart__ objects must be contained within at least one composite object. |
| + The second specialization, shown in Figure 4, describes the concept of inserperable parts. As shown, all __InserperablePart__ objects are contained within at least one composite object, that is, the object cannot exist separately from a collection. |
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| - The third specialization, shown in Figure 5, describes the notion of essential parts. An is shown in Figure |
| + The third specialization, shown in Figure 5, describes the notion of an essential part. A composite object in general can contain heterogeneous parts, for example, a car is made up of wheels, a chassis, bumpers, and so on. An essential part denotes a specific type of part that all objects of a particular type of collection must posses. For example, wheels are generally considered an essential part of a car, wherease a sunroof is not an essential part. |
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