# Core concepts

There are several concepts that are fundamental to Foundry Rules:

* **[Object model](../object-model/index.md):** Foundry rules are **objects** with **properties** that can be managed by **rule proposals**.
* **[Workshop application](../workshop-application/index.md):** Foundry rules are managed by a **Workshop application** which usually includes **Rule Editor** and **Proposal Reviewer** functionality.
* **[Rule logic](../rule-logic/index.md):** Foundry rules encode business logic designed to perform a
  [particular workflow](../overview/index.md#example-use-cases). This logic follows a specific structure and defines a set of transformations upon data.
* **[Foundry Rules workflow configuration](../foundry-rules-workflow-configuration/index.md):** Foundry rules are configured using the workflow configuration editor. The editor is an interface used by workflow owners to customize Foundry Rules to their use case. <br><br>
  ![Foundry Rules workflow overview list](../../../assets/f8e044ef5671ef0800b0190dc7dfb9abbdcfd6d09538ebba2312e05a07c8bf29.webp) <br><br>

:::callout{theme="warning"}
Prior to July 2022, Foundry Rules included additional concepts and required more configuration. If you deployed Foundry Rules before this date, then learn more about these [additional concepts and configurations](../legacy-foundry-rules-setup-taurus/index.md).
:::