Help:Contributing/diagrams

RonzzWikiBase has the Diagrams extension installed (vendored v1.0.0). Therefore, you can create diagrams directly with in the page via PlantUML/GraphViz/Mscgen/Mermaid snippets.

Tag	What it renders	Where it renders
<uml>	PlantUML (sequence, class, state, activity, component, …)	server-side, cached image
<graphviz>	GraphViz (dot, neato, fdp, sfdp, circo, twopi, osage)	server-side, cached image
<mscgen>	Message sequence charts	server-side, cached image
<mermaid>	Mermaid (flowchart, sequence, ER, Gantt, …)	in your browser

PlantUML

<uml type="uml">
Alice -> Bob: hello
</uml>

Result:

You can also write the usual @startuml/@enduml directives (both forms work):

<uml>
@startuml
Alice -> Bob: hello
@enduml
</uml>

The bundled PlantUML stdlib is available (!include <C4/C4_Context> and friends).

PlantUML runs in its SANDBOX security profile on this instance: !include of local files and URLs is disabled. Diagrams can use the bundled stdlib but must be otherwise self-contained.

GraphViz

<graphviz renderer="dot">
digraph g { A -> B -> C }
</graphviz>

Different renderer engines provide different layouts:

Renderer	Rendered graph
dot (default if "renderer" omitted)
neato
fdp
sfdp
circo
twopi
osage

Mscgen

<mscgen>
msc { A, B; A -> B [ label="hello" ]; }
</mscgen>

Mermaid

<mermaid>
graph LR
  A --> B
</mermaid>

graph LR A --> B

Mermaid renders in your browser (JavaScript): the diagram is empty in printed/static export. Use other options above for print-friendly diagrams.

Output format

The default output is SVG (crisp, small). Force PNG per diagram with format="png":

<uml type="uml" format="png">
Alice -> Bob: hello
</uml>

See also

• Help:Contributing — contributing to this wiki
• Help:Contributing/math — LaTeX + KaTeX math
• Help:Contributing/code — code blocks and syntax highlighting