Sorry, you have to be more specific in your request: I am not sure to understand it fully.
Today, you can print the current version of PlantUML:
@startuml
version
@enduml
Or using the preprocessor ( http://plantuml.com/preprocessing ), you can also have:
@startuml
header generated at %DATE%
Bob -> Alice : hello
@enduml
Is this what you are expecting ?
Thanks!