Export requirement sets and link sets to work with them in previous versions of Simulink® Requirements™. Starting in R2018b, you can export requirement sets to previous versions of Simulink Requirements (R2017b and beyond).
Export link sets to previous versions of Simulink Requirements by exporting the Simulink models that the link sets are associated with to previous versions of Simulink. See Export Model to Previous Simulink Version.
You can export requirement sets to previous versions from within the Requirements Editor. Navigate to the Requirements View and select the requirement set for export. Before you attempt the Export operation, make sure that the requirement set you want to export is not open in a model. In the Requirements Editor window, select Save > Export to Previous. From the dialog box, select the file name and version you want to export to.
If you export a requirement set with outgoing links to a previous version, Simulink Requirements creates a requirement set and link set files corresponding to that previous version.