第3章 Decision Model and Notation (DMN)
Decision Model and Notation (DMN) is a standard established by the Object Management Group (OMG) for describing and modeling operational decisions. DMN defines an XML schema that enables DMN models to be shared between DMN-compliant platforms and across organizations so that business analysts and business rules developers can collaborate in designing and implementing DMN decision services. The DMN standard is similar to and can be used together with the Business Process Model and Notation (BPMN) standard for designing and modeling business processes.
For more information about the background and applications of DMN, see the OMG Decision Model and Notation specification.
3.1. Creating the traffic violations DMN decision requirements diagram (DRD)
A decision requirements diagram (DRD) is a visual representation of your DMN model. Use the DMN designer in Business Central to design the DRD for the traffic violations project and to define the decision logic of the DRD components.
図3.1 DRD for the Traffic Violations example

Prerequisites
- You have created the traffic violations project in Business Central.
Procedure
- On the traffic-violation project’s home page, click Add Asset.
On the Add Asset page, click DMN. The Create new DMN window is opened.
-
In the Create new DMN window, enter
Traffic Violation
in the DMN name field. -
From the Package list, select
com.myspace.traffic_violation
. - Click Ok. The DMN asset in the DMN designer is opened.
-
In the Create new DMN window, enter
In the DMN designer canvas, drag two DMN Input Data input nodes on to the canvas.
図3.2 DMN Input Data nodes
-
In the upper-right corner, click the Properties
icon.
-
Double-click each input node, and in the Name field, rename one to
Driver
and the other toViolation
. - Drag a DMN Decision decision node on to the canvas.
-
Double-click the decision node and rename it to
Fine
. Click the Violation input node, select the Create DMN Information Requirement icon and click the
Fine
decision node to link the two nodes.図3.3 Create DMN Information Requirement icon
- Drag a DMN Decision decision node on to the canvas.
-
Double-click the decision node and rename it to
Should the driver be suspended?
. - Click the Driver input node, select the Create DMN Information Requirement icon and click the Should the driver be suspended? decision node to link the two nodes.
- Click the Fine decision node, select the Create DMN Information Requirement icon, and select the Should the driver be suspended? decision node.
Click Save.
注記As you periodically save a DRD, the DMN designer performs a static validation of the DMN model and might produce error messages until the model is defined completely. After you finish defining the DMN model completely, if any errors remain, troubleshoot the specified problems accordingly.