Decision Requirements Diagrams

In any DMN model, you start by creating a Decision Requirements Diagram (DRD). A DRD is the visual representation of a DMN model, known as a Decision Requirements Graph (DRG). A DRG can consist of one or more DRDs or diagrams.

You model decisions in diagrams using a standard palette of elements.

You can have multiple decisions in the one diagram or spread them over multiple diagrams to avoid complex decision models that are difficult to read.

Before you start modeling your decisions, get to know how diagrams work, how to format them, configure decision definitions, view decision structure and reports, and download decision models and images.

Tour the Design page

Before you start, get to know the DMN Design page. The Design page is where you model and edit decisions.

1. Header:

   • Cardanit logo: click to go to the Home page.

   • Menu: Go to My Files, rename the project, and hide or show collaborator cursors.

   • A tab menu that gives you access to the Design, Logic and Report pages.

   • The project name.

   • Access to version history.

   • See who the project is shared with and share the project with others.

   • View your profile.

   • Access the help section.

2. Project panel

   The Project panel shows the elements you can use to map your decision model. The Structure tab lets you explore the decision structure.

   Click to open or close the Project panel.

3. Main toolbar

   Use the main toolbar to perform key actions on your diagram:

   • Diagram dropdown list: Switch between diagrams in your project.

   • Undo and redo: Reverse or reapply recent actions.

   • Select and pan: Use Selection mode to select elements or Pan mode to navigate around the diagram without selecting elements.

   • Layout: Adjust diagram spacing with create space and remove space tools.

   • Download: Download the diagram image or DMN model.

4. Attributes panel

   Configure element properties and appearance.

   Click to open or close the Attributes panel.

5. Diagram

   This is where you create, map and edit your decisions.

6. View toolbar

   The view toolbar provides tools to adjust your view of the diagram. Use it to zoom in, zoom out, reset the view, or open the mini-map for easier navigation of large or complex diagrams.

7. Diagram tab bar

   Manage and switch between multiple DMN diagrams. Add new diagrams, rename them and switch between diagrams.