Domain Driven Design Tag

Aggregates are guards for business principles in domain implementation. They merge several contexts into one, transparent object which unifies the interface for aggregated stuff. For example we can have many entities and value objects nested in aggregate. Our security guy will provide a mechanism for checking aggregated data consistency and integrity. Using policies and specifications (which I described in the previous chapter of the series Domain Driven Design: domain building blocks) we can ensure immutability of business assumptions.  

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