Chapter 4. The Fact Model


4.1. Fact Models

A fact model is needed to drive the rules of a rule-based application. The fact model typically overlaps with the application's domain model, but, in general, it should be de-coupled from it, making the rules easier to manage over time.
There are two ways to define a Fact Model:
  • Upload a JAR file containing the Java classes used by both the application and the rules.
  • Declare a model within BRMS that can be exported as a KnowledgeBase and used within your Java code.

Back to top
Red Hat logoGithubredditYoutubeTwitter

Learn

Try, buy, & sell

Communities

About Red Hat Documentation

We help Red Hat users innovate and achieve their goals with our products and services with content they can trust. Explore our recent updates.

Making open source more inclusive

Red Hat is committed to replacing problematic language in our code, documentation, and web properties. For more details, see the Red Hat Blog.

About Red Hat

We deliver hardened solutions that make it easier for enterprises to work across platforms and environments, from the core datacenter to the network edge.

Theme

© 2025 Red Hat