You can export a DMN decision requirements diagram.
Procedure
Select the DMN decision requirements diagram in the Navigation bar.
Activate the Contents tab bar.
Select Export > Export DMN diagram as a DMN file.
Select the location, the name, and the file type (DMN1.1 XML file (*.dmn), DMN1.2 XML file (*.dmn), or DMN1.3 XML file (*.dmn)) under which you want to save the DMN diagram file.
Click OK.
If errors or warnings have occurred during the export, they are displayed in the DMN export complete dialog.