{"nodes": [

  {"nodeType" : "request", "text" : "Plot", "id" :  "request-treeRootNode"} ,    

  {"nodeType" : "download", "text" : "Download", "id" :  "download-treeRootNode"} ,

  {"nodeType" : "condition","text" : "Data Mining","id" : "condition-treeRootNode" },
  {"nodeType" : "statistic","text" : "Statistic","id" : "statistic-treeRootNode" }

]}