I have a proposal to upgrade the format of the existing XMI export file , so that it can be imported into the StarUML tool.
For example, there are some small differences in the format. I don't know the specific location, which makes the import and export between the two tools report errors.
StarUML uses open source plug-ins as follows: https://github.com/staruml/staruml-xmi
Or can GDS support the analysis of all classes in the project, like this: https://forums.ni.com/t5/LabVIEW-APIs-Discussions/Project-to-Plant-UML-Diagram-Script/td-p/3984499