performer.json

{
  "name"  : "hello world",
  "ports" : { 
    "in"  : [], 
    "out" : [] 
  },
  "nodes" : {
    "1" : {
      "name" : "string",
      "meta" : {
        "value" : "hello flow based world!"
      },
      "x"    : 10,
      "y"    : 10
    },
    "2" : {
      "name" : "print",
      "meta" : {},
      "x"    : 100,
      "y"    : 100
    }
  },
  "pipes" : [
    {
      "src"  : { "id" : "1", "port" : "value" },
      "dest" : { "id" : "2", "port" : "value" }
    }
  }
}


{
  "id"   : "1",
  "meta" : {},
  "name" : "printer",
  "ports": {
    "in" : [
      {
        "name" : "value",
      }
    ]
  },
  "nodes" : {
    "1" : {
      "type" : "print",
      "x" : 100,
      "y" : 100
    }
  },
  "pipes" : [
    {
      "src"  : { "id" : "1", "port" : "value" },
      "dest" : { "id" : "2", "port" : "value" }
    }
  }
}