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Re:PlantUML in a nutshell by m-p-3 on Saturday November 02, 2019 @02:45PM (#21429262)
Not sute if that would fit all your requirements, but I'm sharing just in case

https://mermaidjs.github.io/

Re:PlantUML in a nutshell by timmattison on Monday November 04, 2019 @09:17AM (#21441785)
Thanks, I looked at it a while go and had some trouble getting started. I'll try it again.