namespace local = ""
namespace inh = inherit

start = workflow

workflow =
   element workflow
   {
      attribute name { xsd:string },
      attribute version { xsd:integer },
      node*,
      variableHandler*
   }

node =
   element node
   {
      attribute id { xsd:integer },
      attribute type { xsd:string },
      attribute serviceObjectClass { xsd:string }?,
      attribute subWorkflowName { xsd:string }?,
      (
         element in
         {
            element variable
            {
               attribute name { xsd:string },
               attribute as { xsd:string }
            }+
         },
         element out
         {
            element variable
            {
               attribute name { xsd:string },
               attribute as { xsd:string }
            }+
         }
      )?,
      attribute variable { xsd:string }?,
      attribute operand { xsd:string }?,
      arguments?,
      condition+?,
      element variable { attribute name { xsd:string }, condition?, variable? }+?,
      outNode+?
   }

outNode = element outNode { attribute id { xsd:integer } }

condition =
   element condition
   {
      attribute type { xsd:string },
      attribute a { xsd:string }?,
      attribute b { xsd:string }?,
      attribute name { xsd:string }?,
      attribute value { xsd:string }?,
      attribute variable { xsd:string }?,
      array?,
      condition+?,
      outNode?,
      else?
   }

else = element else { outNode }

variableHandler =
   element variableHandler
   {
      attribute variable { xsd:string },
      attribute class { xsd:string }
   }

arguments = element arguments { variable* }

variable = array | boolean | double | integer | null | object | \string

array = element array { \element* }

\element = element element { attribute key { xsd:string }, variable }

boolean = element boolean { xsd:string }

double = element double { xsd:double }

integer = element integer { xsd:integer }

null = element null { text }

object = element object { attribute class { xsd:string }, arguments? }

\string = element string { xsd:string }