> ## 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.

# Extension Reference

ASEE Flow extends BPMN with custom extension elements and attributes.

* [**Extension Elements**](/reference/bpmn20/custom-extensions/extension-elements) — Reference of the ASEE Flow extension elements for BPMN.
* [**Extension Attributes**](/reference/bpmn20/custom-extensions/extension-attributes) — Reference of the ASEE Flow extension attributes for BPMN.