A  Nesting Adjacency is an Adjacency Item that references its Element by nesting.

Nesting is a fundamental concept in complex systems organization where Entity Elements are contained within other Entity Elements, creating hierarchical or web-like structures. This embedding mechanism intrinsically links the properties, behaviors, and lifecycles of nested Elements to their containing Elements, forming cohesive units at multiple scales.

Nesting facilitates the emergence of complex aggregates and properties from simpler Entity Elements, enables efficient design of systems across levels, and supports both autonomy and integration within systems.