text: /*globals just_started,schedule,scheduled,completed,workflow_input,stop,results,waiting_for */
  if (just_started) {
      schedule("sw-55", {
          "activityType": "fetch",
          "input": {
              "URL": "http://www.feedbooks.com/books/top.atom?category=FBFIC016000&lang=en"
          }
      });
  }
  if (!scheduled("_OUTPUT") && completed("sw-137")) {
      var params = {
          "activityType": "output",
          "input": {}
      };
      params.input["_INPUT"] = results("sw-137")["_OUTPUT"];
      schedule("_OUTPUT", params);
  }
  if (!scheduled("sw-137") && completed("sw-55")) {
      var params = {
          "activityType": "rename",
          "input": {
              "RULE": [
                  {
                      "field": "",
                      "op": "rename",
                      "newval": ""
                  }
              ]
          }
      };
      params.input["_INPUT"] = results("sw-55")["_OUTPUT"];
      schedule("sw-137", params);
  }
  if (completed('_OUTPUT')) {
      stop('finished !');
  }