A  Bounded Aggregate is an Aggregate Entity Block which hides its internal structure to the outside world by means of formal Borders.

The only way to access a  Bounded Aggregate is through its formal Borders, which ensures the aggregate's internal consistency.

The Borders of a  Bounded Aggregate is determined by the Ordering Connections it can participate to.

Within a  Bounded Aggregate structure, Bounded Members can be linked together through Ordering Connectors.

The nature of Ordering Connectors is given by their associated Ordering Connection.

Examples:

- Action Processes are bounded by their start and end events (see Behavioral Event).

- Applications are bounded by their APIs borders (API Service Point and API Request Point).

An  Unbounded Aggregate is an Aggregate Entity Block that does not have boundaries and, thereby, that cannot participate to Ordering Connections.

Examples:

- Operating Eco-System;

- Directive.