> ## Documentation Index
> Fetch the complete documentation index at: https://docs.aseeflow.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Gateways

Gateways control token flow in a process. They allow modeling *decisions* based on data and events as well as fork / join *concurrency*.

* [**Exclusive Gateway (XOR)**](/reference/bpmn20/gateways/exclusive-gateway) — Model decisions based on data.
* [**Conditional and Default Sequence Flows**](/reference/bpmn20/gateways/sequence-flow) — Concurrency and decisions without gateways.
* [**Parallel Gateway**](/reference/bpmn20/gateways/parallel-gateway) — Model fork / join concurrency.
* [**Inclusive Gateway**](/reference/bpmn20/gateways/inclusive-gateway) — Model conditional fork / join concurrency.
* [**Event-Based Gateway**](/reference/bpmn20/gateways/event-based-gateway) — Model decisions based on events.