Embed PlantUML, DOT, etc. diagrams in your documentation using Gravizo.
Inline graph, show as png:
.. gravizo:: png
@startuml
Alice -> Bob: Authentication Request
Bob --> Alice: Authentication Response
Alice -> Bob: Another authentication Request
Alice <-- Bob: Another authentication Response
@enduml
Load from a file, show as svg:
.. gravizo:: ./path/to/graph.puml svg