The Decision Model and Notation (DMN™) is a Standard by OMG® providing a common and visual notation readily understandable by all users and personas. With DMN, business analysts can define the initial decision requirements and then formalize more detailed decision models; technical developers can automate the decisions in any process with a portable execution semantic, while business stakeholders can manage and monitor those decisions.
The official webpage of the DMN Standard specification is available at
Drools DMN engine is an open source Java™ implementation providing full runtime support for DMN models at Conformance level 3, meaning 100% of the features in the Standard.
Manage any decision complexity by decomposing and structuring decision services with Decision Requirement Graph (DRG)
Model business logic with DMN Decision Table, an effective instrument understandable by all personas. Drools DMN engine performs static analysis of the DMN Decision Table to detect Gaps, Overlaps and ensure the table rules follows industry best-practices.
Model more complex business logic with the power of all the FEEL Boxed Expression constructs made available by the DMN Standard specification.
Drools DMN engine provides full runtime support for DMN models at Conformance level 3, meaning 100% of the
features in the Standard.
We contribute to the DMN Technology Compatibility Kit (DMN TCK), a community-led proposal for a verifiable and executable method to demonstrate the Conformance level of support provided by a Vendor supplied DMN implementation.
Looking for a gentle introduction to the DMN standard?
We have just the right crash course on DMN, freely available for you at: learn-dmn-in-15-minutes.com.
Drools DMN engine: the DMN FEEL handbook is a vademecum for the FEEL expression language from the DMN specification, as also implemented by the Drools DMN open source engine.
Drools documentation: DMN support in Drools.
A tutorial showing how to create and test an example DMN model with Red Hat Decision Manager: Getting started with decision services.