v0.1
This StarUML extension is an implementation of the UML->API technical specification at https://edi3.org/uml-profile/. Please review the specification before using this extension because it provides some insight into the UML constructs that are supported and how they map to OpenAPI3.0 specifications.
Install the extension in the usual way for StarUML extensions. Then select Tools->OpenAPI from your StarUML menu, select the UML package for generation and click OK. That's it.