Pflow URL syntax

gistfile1.txt

Diagram(
  Sequence(
    Terminal('/?'),
    Sequence(
      Terminal('modelType='),
      Terminal('petriNet')
    ),
    Terminal('&'),
    Sequence(
      Terminal('version='),
      Terminal('v0')
    ),
    Terminal('&'),
    ZeroOrMore(
      Sequence(
        Terminal('place='),
        NonTerminal('place_name'),
        Terminal('&offset='),
        NonTerminal('offset'),
        Optional(
          Sequence(
            Terminal('&initial='),
            NonTerminal('initial')
          )
        ),
        Optional(
          Sequence(
            Terminal('&capacity='),
            NonTerminal('capacity')
          )
        ),
        Terminal('&x='),
        NonTerminal('x_coord'),
        Terminal('&y='),
        NonTerminal('y_coord')
      )
    ),
    Terminal('&'),
    ZeroOrMore(
      Sequence(
        Terminal('transition='),
        NonTerminal('transition_name'),
        Terminal('&x='),
        NonTerminal('x_coord'),
        Terminal('&y='),
        NonTerminal('y_coord')
      )
    ),
    Terminal('&'),
    ZeroOrMore(
      Sequence(
        Terminal('source='),
        NonTerminal('source_name'),
        Terminal('&target='),
        NonTerminal('target_name'),
        Optional(
          Sequence(
            Terminal('&weight='),
            NonTerminal('weight')
          )
        ),
        Optional(
          Terminal('&inhibit=true')
        )
      )
    )
  )
)