Specs for graphs to view with https://dreampuf.github.io/GraphvizOnline
To view any graph, replace the filename in the URL e.g
Tableau Server Vizportal API: https://dreampuf.github.io/GraphvizOnline/?url=https%3A%2F%2Fraw.githubusercontent.com%2Fjacalata%2Fgraphvizzes%2Fmain%2Ftableau-server-api.yml
open live editor with new doc: https://www.plantuml.com/plantuml/uml