> For the complete documentation index, see [llms.txt](https://doc.orbeon.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.orbeon.com/form-runner/architecture-and-integration/architecture.md).

# Architecture

## Basics

The Orbeon Forms architecture, viewed from the outside, is simple. It consists of Form Builder (the form editor) and Form Runner (the forms runtime), talking to a database (persistence layer). In addition, integration with a user management system is frequent.

![Overall architecture](/files/-LEkC7Bivs5_Pb4bP7L1)

## Integration points

See [Form Runner Integration](/form-runner/architecture-and-integration/integration.md) and [Form Builder Integration](/form-builder/advanced/extensibility/integration.md).