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 }