diff --git a/nmb2b.py b/_DUMP/nmb2b.py
similarity index 100%
rename from nmb2b.py
rename to _DUMP/nmb2b.py
diff --git a/data/sqlite.db b/data/sqlite.db
index c64a7cf..651a21a 100644
Binary files a/data/sqlite.db and b/data/sqlite.db differ
diff --git a/demo.py b/demo.py
index 439f357..d8f8ee6 100644
--- a/demo.py
+++ b/demo.py
@@ -1,15 +1,23 @@
 from manager import Manager
+import json
+import utils
 
 test_manager = Manager()
-test_manager.show_available_services()
-test_manager.show_operations_of_service(service_name='FlightManagementService')
+#test_manager.show_available_services()
+#test_manager.show_operations_of_service(service_name='FlightManagementService')
 
-test = test_manager.queryFlightsByAirspace(
-    airspace="LFFFUZ",
+requestedFlightFields = ['aircraftOperator']
+# TODO : renseigner plusieurs airspace ?
+fpl_data = test_manager.queryFlightsByAirspace(
+    airspace="LFFFTH",
    	dataset='OPERATIONAL',
-   	includeProposalFlights=False,
+   	includeProposalFlights=True,
    	includeForecastFlights=True,
    	trafficType='LOAD',
-   	trafficWindow={'wef': "2019-07-11 06:30", 'unt': "2019-07-11 07:00"}
+   	trafficWindow={'wef': "2019-07-11 12:00", 'unt': "2019-07-11 14:00"},
+	requestedFlightFields=requestedFlightFields,
+	py_output=False
 )
-print(test)
+
+print(fpl_data)
+#utils.write_content_to_file(filename="fpl_data.json", content=json.dumps(fpl_data))
\ No newline at end of file
diff --git a/manager.py b/manager.py
index ba21aa4..ca5c6bb 100644
--- a/manager.py
+++ b/manager.py
@@ -5,6 +5,8 @@
 from zeep import Client, Settings
 from zeep.cache import SqliteCache
 from zeep.transports import Transport
+from zeep.helpers import serialize_object
+import json
 
 from shared_vars import (B2B_PROXY, DEFAULT_B2B_VERSION, DEFAULT_DATASET,
                          WSDL_PROXY, get_dataset)
@@ -30,6 +32,7 @@ def __init__(
             'wsdl': self.wsdl,
             'transport': self.transport
         }
+        self.tmp_data = None
     
     # -----------------------------------------------------------------------------------------
     def set_available_services(self):
@@ -65,10 +68,28 @@ def show_operations_of_service(self, service_name):
     # -----------------------------------------------------------------------------------------
     def queryFlightsByAirspace(
         self, airspace, dataset, trafficType,
-        includeProposalFlights, includeForecastFlights, 
-        trafficWindow, sendTime=utils.sendTime()):
+        includeProposalFlights, includeForecastFlights,
+        trafficWindow, requestedFlightFields=[], sendTime=utils.sendTime(),
+        py_output=True):
         client = Client(**self.conf, service_name='FlightManagementService')
-        return client.service.queryFlightsByAirspace(
-            airspace=airspace, sendTime=sendTime, dataset=self.dataset, trafficType=trafficType,
+        self.tmp_data = client.service.queryFlightsByAirspace(
+            airspace=airspace, dataset=self.dataset, trafficType=trafficType,
             includeProposalFlights=includeProposalFlights, includeForecastFlights=includeForecastFlights, 
-            trafficWindow=trafficWindow)
+            trafficWindow=trafficWindow, requestedFlightFields=requestedFlightFields, sendTime=sendTime)
+        if py_output:
+            return serialize_object(self.tmp_data)
+        return self.tmp_data
+
+    # def queryFlightsByAerodrome(
+    #     self, aerodrome, dataset, trafficType,
+    #     includeProposalFlights, includeForecastFlights, 
+    #     trafficWindow, sendTime=utils.sendTime(),
+    #     py_output=True):
+    #     client = Client(**self.conf, service_name='FlightManagementService')
+    #     self.tmp_data = client.service.queryFlightsByAirspace(
+    #         aerodrome=aerodrome, aerodromeRole=aerodromeRole, sendTime=sendTime, dataset=self.dataset, trafficType=trafficType,
+    #         includeProposalFlights=includeProposalFlights, includeForecastFlights=includeForecastFlights, 
+    #         trafficWindow=trafficWindow)
+    #     if py_output:
+    #         return serialize_object(self.tmp_data)
+    #     return self.tmp_data
\ No newline at end of file
diff --git a/nm_docs/dpi-impl-guide.pdf b/nm_docs/dpi-impl-guide.pdf
new file mode 100644
index 0000000..d90d21f
Binary files /dev/null and b/nm_docs/dpi-impl-guide.pdf differ
diff --git a/shared_vars.py b/shared_vars.py
index ae19d21..e8ccfed 100644
--- a/shared_vars.py
+++ b/shared_vars.py
@@ -23,4 +23,7 @@
 DEFAULT_DATASET = "OPERATIONAL"
 def get_dataset(wanted_dataset):
 	if wanted_dataset in ALLOWED_DATASET: return wanted_dataset
-	return "OPERATIONAL"
\ No newline at end of file
+	return "OPERATIONAL"
+
+ROOT_PATH = os.path.dirname(os.path.abspath(__file__))
+DATA_PATH = os.path.join(ROOT_PATH, "data")
\ No newline at end of file
diff --git a/utils.py b/utils.py
index 6e80f09..d4f6749 100644
--- a/utils.py
+++ b/utils.py
@@ -14,14 +14,16 @@
 
 #from decolog import *
 #from dsnaproxies import dsnaproxies
+from shared_vars import DATA_PATH
 
 
 # -------------------------------------------------------------------
 # -------------------------------------------------------------------
 # Nouveaux utilitaires par Maxence
-def write_content_to_file(filename, content):
-	os.makedirs(os.path.dirname(filename), exist_ok=True)
-	with open(filename, 'w') as file_to_be_written:
+def write_content_to_file(filename, content, rep=DATA_PATH):
+	os.makedirs(os.path.dirname(rep+filename), exist_ok=True)
+	full_path = os.path.join(rep, filename)
+	with open(full_path, 'w') as file_to_be_written:
 		file_to_be_written.write(content)
  
 def get_datetime(nbr_days=0):