diff --git a/Backend-libXML/main.py b/Backend-libXML/main.py
index 4d8de0d..50a5c09 100644
--- a/Backend-libXML/main.py
+++ b/Backend-libXML/main.py
@@ -8,15 +8,34 @@ import Parser
 
 app = Flask(__name__)
 
-def process_xml(request, type):
+
+def process_xml(request: request, type: str) -> str:
+    """Function to process 
+
+    :param request: Received request
+    :type request: request
+    :param type: Type of needed processing: xsd, xslt or xpath
+    :type type: str
+    :raises ValueError: is raised when type is different than those provided above
+    :return: response JSON converted to string
+    :rtype: str
+    """
     start = time.time_ns()
 
     response = dict()
     try:
         request_data = json.loads(request.get_data(as_text=True))
-        xml = request_data['data']
-        xsd = request_data['process']
-        response['result'] = Parser.xsd(xml, xsd)
+        data = request_data['data']
+        process = request_data['process']
+        if (type == "xsd"):
+            response['result'] = Parser.xsd(data, process)
+        elif (type == "xslt"):
+            response['result'] = Parser.xslt(data, process)
+        elif (type == "xpath"):
+            response['result'] = Parser.xpath(data, process)
+        else:
+            raise ValueError("Valid operation types are: xsd, xslt, xpath")
+
         response['status'] = "OK"
     except KeyError as e:
         response['result'] = "Missing key: " + str(e)
@@ -33,26 +52,7 @@ def process_xml(request, type):
 
 @app.route("/xpath", methods=["POST"])
 def xpath():
-    start = time.time_ns()
-    
-    response = dict()
-    try:
-        request_data = json.loads(request.get_data(as_text=True))
-        xml = request_data['data']
-        xpath = request_data['process']
-        response['result'] = Parser.xpath(xml, xpath)
-        response['status'] = "OK"
-    except KeyError as e:
-        response['result'] = "Missing key: " + str(e)
-        response['status'] = "ERR"
-    except Exception as e:
-        response['result'] = str(e)
-        response['status'] = "ERR"
-    finally:
-        exec_time = (time.time_ns() - start) / 10**6
-        response['time'] = f"{exec_time:.03f}"
-        response['processor'] = "libxml2 over lxml"
-        return json.dumps(response)
+    return process_xml(request, "xpath")
 
 @app.route("/xsd", methods=["POST"])
 def xsd():
@@ -60,23 +60,7 @@ def xsd():
 
 @app.route("/xslt", methods=["POST"])
 def xslt():
-    start = time.time_ns()
+    return process_xml(request, "xslt")
 
-    response = dict()
-    try:
-        request_data = json.loads(request.get_data(as_text=True))
-        xml = request_data['data']
-        xslt = request_data['process']
-        response['result'] = Parser.xslt(xml, xslt)
-        response['status'] = "OK"
-    except KeyError as e:
-        response['result'] = "Missing key: " + str(e)
-        response['status'] = "ERR"
-    except Exception as e:
-        response['result'] = str(e)
-        response['status'] = "ERR"
-    finally:
-        exec_time = (time.time_ns() - start) / 10**6
-        response['time'] = f"{exec_time:.03f}"
-        response['processor'] = "libxml2 over lxml"
-        return json.dumps(response)
+if __name__ == "__main__":
+    app.run()
\ No newline at end of file