# The concept of Aggregate

By [rojeck](https://paragraph.com/@rojeckluo) · 2021-11-28

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    Aggregation represents a weak "ownership" relationship, which is generally expressed as a loose relationship between the whole and the part. In fact, the so-called whole and part can also be completely unrelated. For example, object A holds object B, object B is not part of object A, that is, the life cycle of object B is managed by object B itself, and is not related to object A.

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*Originally published on [rojeck](https://paragraph.com/@rojeckluo/the-concept-of-aggregate)*