This is a vim syntax file for PlantUML.
The filetype will be set to plantuml for *.pu, *.uml, *.puml, *.iuml or
*.plantuml files or if the first line of a file contains @startuml.
Additionally the makeprg is set to plantuml assuming you have this
executable in your path. This file could contain something like
#!/bin/bash
java -jar $HOME/lib/java/plantuml.jar -tsvg $@You can change the name of this file by setting g:plantuml_executable_script
and disable this feature by setting g:plantuml_set_makeprg to 0.
See examples here: Plantuml Syntax.