> ## 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.

# Legacy FEEL Reference

<Info>
  **Heads Up!**

  This page provides information on the legacy FEEL Engine, that was used before the
  current [Scala-based FEEL Engine](/user-guide/dmn-engine/feel)
  was integrated into ASEE Flow.
</Info>

* [**FEEL Data Types**](/reference/dmn/feel/legacy/data-types) — Data types in the legacy FEEL engine.
* [**FEEL Language Elements**](/reference/dmn/feel/legacy/language-elements) — Language elements of the legacy FEEL engine.