PlantUML activity grammar

Question

I need to build ANTLR PlantUML activity diagram lexer and parser for my university project, is there any documentation with PlantUML grammar rules that I can refer to, or only this page https://plantuml.com/activity-diagram-beta?

Answer 1

Hello A.,

All the Internal Regex in order to parse the activity grammar are here:

• plantuml/src/main/java/net/sourceforge/plantuml/activitydiagram3/command at master · plantuml/plantuml

Enjoy,

Thank you to share your work if you wish.

Regards,
Th.

Comments

See also other project with the same goal (create a plantuml grammar):

• pjcuadra/plantuml-parser: Python Implementation of a PlantUML Parser using LARK
• bafolts/plantcode: Provides a javascript utility to generate code in various languages given a plantuml class diagram.
• Enteee/plantuml-parser: Parse PlantUML with JavaScript or TypeScript
• jgoppert/pumlg: A flexible code generator for plantuml diagrams based on the Antlr4 C++ runtime.
• grammars-v4/plantUML at master · antlr/grammars-v4

Ref.:

• Is there a parser available to parse a model written in plantUML language? - PlantUML Q&A
• Plantuml grammars and syntax · Issue #63 · plantuml/plantuml

Regards,
Th.

Answer 2

PlantUML’s TikZ/LaTeX export currently focuses on generating diagram structures rather than passing arbitrary raw LaTeX commands directly into the output. If you need advanced formatting, it may be worth reviewing the official PlantUML documentation to see which export customizations are supported and whether there are any workarounds using notes, sprites, or post-processing. For broader LaTeX integration ideas, the TikZ & PGF documentation is also a useful reference, especially when modifying generated TikZ code after export.