diff --git a/src/service/service/service_handler_api/_ServiceHandler.py b/src/service/service/service_handler_api/_ServiceHandler.py
index e724ebcc986a1c5d205c2b77d9cb944d6faeb359..c72efa5c39c71a0a1a77c5238aabd35de54df9f7 100644
--- a/src/service/service/service_handler_api/_ServiceHandler.py
+++ b/src/service/service/service_handler_api/_ServiceHandler.py
@@ -19,10 +19,12 @@ from device.client.DeviceClient import DeviceClient
 from service.service.database.ServiceModel import ServiceModel
 
 class _ServiceHandler:
-    def __init__(
-        self, db_service : ServiceModel, database : Database, context_client : ContextClient,
-        device_client : DeviceClient, **settings
-    ) -> None:
+    def __init__(self,
+                 db_service: ServiceModel,
+                 database: Database,
+                 context_client: ContextClient,
+                 device_client: DeviceClient,
+                 **settings) -> None:
         """ Initialize Driver.
             Parameters:
                 db_service
@@ -30,94 +32,121 @@ class _ServiceHandler:
                 database
                     The instance of the local in-memory database.
                 context_client
-                    An instance of context client to be used to retrieve information from the service and the devices.
+                    An instance of context client to be used to retrieve
+                    information from the service and the devices.
                 device_client
-                    An instance of device client to be used to configure the devices.
+                    An instance of device client to be used to configure
+                    the devices.
                 **settings
                     Extra settings required by the service handler.
         """
         raise NotImplementedError()
 
-    def SetEndpoint(self, endpoints : List[Tuple[str, str, Optional[str]]]) -> List[Union[bool, Exception]]:
-        """ Set endpoints from a list.
+    def SetEndpoint(self, endpoints: List[Tuple[str, str, Optional[str]]]) \
+            -> List[Union[bool, Exception]]:
+        """ Create/Update service endpoints.
             Parameters:
-                endpoints : List[Tuple[str, str, Optional[str]]]
-                    List of tuples, each containing a device_uuid, endpoint_uuid and, optionally, the topology_uuid
+                endpoints: List[Tuple[str, str, Optional[str]]]
+                    List of tuples, each containing a device_uuid,
+                    endpoint_uuid and, optionally, the topology_uuid
                     of the endpoint to be added.
             Returns:
-                results : List[Union[bool, Exception]]
-                    List of results for endpoint changes requested. Return values must be in the same order than
-                    endpoints requested. If an endpoint is properly added, True must be retrieved; otherwise, the
-                    Exception that is raised during the processing must be retrieved.
+                results: List[Union[bool, Exception]]
+                    List of results for endpoint changes requested.
+                    Return values must be in the same order as the requested
+                    endpoints. If an endpoint is properly added, True must be
+                    returned; otherwise, the Exception that is raised during
+                    the processing must be returned.
         """
         raise NotImplementedError()
 
-    def DeleteEndpoint(self, endpoints : List[Tuple[str, str, Optional[str]]]) -> List[Union[bool, Exception]]:
-        """ Delete endpoints form a list.
+    def DeleteEndpoint(self, endpoints: List[Tuple[str, str, Optional[str]]]) \
+            -> List[Union[bool, Exception]]:
+        """ Delete service endpoints.
             Parameters:
-                endpoints : List[Tuple[str, str, Optional[str]]]
-                    List of tuples, each containing a device_uuid, endpoint_uuid, and the topology_uuid of the endpoint
+                endpoints: List[Tuple[str, str, Optional[str]]]
+                    List of tuples, each containing a device_uuid,
+                    endpoint_uuid, and the topology_uuid of the endpoint
                     to be removed.
             Returns:
-                results : List[Union[bool, Exception]]
-                    List of results for endpoint deletions requested. Return values must be in the same order than
-                    endpoints requested. If an endpoint is properly deleted, True must be retrieved; otherwise, the
-                    Exception that is raised during the processing must be retrieved.
+                results: List[Union[bool, Exception]]
+                    List of results for endpoint deletions requested.
+                    Return values must be in the same order as the requested
+                    endpoints. If an endpoint is properly deleted, True must be
+                    returned; otherwise, the Exception that is raised during
+                    the processing must be returned.
         """
         raise NotImplementedError()
 
-    def SetConstraint(self, constraints : List[Tuple[str, Any]]) -> List[Union[bool, Exception]]:
-        """ Create/Update constraints.
+    def SetConstraint(self, constraints: List[Tuple[str, Any]]) \
+            -> List[Union[bool, Exception]]:
+        """ Create/Update service constraints.
             Parameters:
-                constraints : List[Tuple[str, Any]]
-                    List of tuples, each containing a constraint_type and the new constraint_value to be set.
+                constraints: List[Tuple[str, Any]]
+                    List of tuples, each containing a constraint_type and the
+                    new constraint_value to be set.
             Returns:
-                results : List[Union[bool, Exception]]
-                    List of results for constraint changes requested. Return values must be in the same order than
-                    constraints requested. If a constraint is properly set, True must be retrieved; otherwise, the
-                    Exception that is raised during the processing must be retrieved.
+                results: List[Union[bool, Exception]]
+                    List of results for constraint changes requested.
+                    Return values must be in the same order as the requested
+                    constraints. If a constraint is properly set, True must be
+                    returned; otherwise, the Exception that is raised during
+                    the processing must be returned.
         """
         raise NotImplementedError()
 
-    def DeleteConstraint(self, constraints : List[Tuple[str, Any]]) -> List[Union[bool, Exception]]:
-        """ Delete constraints.
+    def DeleteConstraint(self, constraints: List[Tuple[str, Any]]) \
+            -> List[Union[bool, Exception]]:
+        """ Delete service constraints.
             Parameters:
-                constraints : List[Tuple[str, Any]]
-                    List of tuples, each containing a constraint_type pointing to the constraint to be deleted, and a
-                    constraint_value containing possible additionally required values to locate the constraint to be
-                    removed.
+                constraints: List[Tuple[str, Any]]
+                    List of tuples, each containing a constraint_type pointing
+                    to the constraint to be deleted, and a constraint_value
+                    containing possible additionally required values to locate
+                    the constraint to be removed.
             Returns:
-                results : List[Union[bool, Exception]]
-                    List of results for constraint deletions requested. Return values must be in the same order than
-                    constraints requested. If a constraint is properly deleted, True must be retrieved; otherwise, the
-                    Exception that is raised during the processing must be retrieved.
+                results: List[Union[bool, Exception]]
+                    List of results for constraint deletions requested.
+                    Return values must be in the same order as the requested
+                    constraints. If a constraint is properly deleted, True must
+                    be returned; otherwise, the Exception that is raised during
+                    the processing must be returned.
         """
         raise NotImplementedError()
 
-    def SetConfig(self, resources : List[Tuple[str, Any]]) -> List[Union[bool, Exception]]:
-        """ Create/Update configuration for a list of resources.
+    def SetConfig(self, resources: List[Tuple[str, Any]]) \
+            -> List[Union[bool, Exception]]:
+        """ Create/Update configuration for a list of service resources.
             Parameters:
-                resources : List[Tuple[str, Any]]
-                    List of tuples, each containing a resource_key pointing the resource to be modified, and a
-                    resource_value containing the new value to be set.
+                resources: List[Tuple[str, Any]]
+                    List of tuples, each containing a resource_key pointing to
+                    the resource to be modified, and a resource_value
+                    containing the new value to be set.
             Returns:
-                results : List[Union[bool, Exception]]
-                    List of results for resource key changes requested. Return values must be in the same order than
-                    resource keys requested. If a resource is properly set, True must be retrieved; otherwise, the
-                    Exception that is raised during the processing must be retrieved.
+                results: List[Union[bool, Exception]]
+                    List of results for resource key changes requested.
+                    Return values must be in the same order as the requested
+                    resource keys. If a resource is properly set, True must be
+                    returned; otherwise, the Exception that is raised during
+                    the processing must be returned.
         """
         raise NotImplementedError()
 
-    def DeleteConfig(self, resources : List[Tuple[str, Any]]) -> List[Union[bool, Exception]]:
-        """ Delete configuration for a list of resources.
+    def DeleteConfig(self, resources: List[Tuple[str, Any]]) \
+            -> List[Union[bool, Exception]]:
+        """ Delete configuration for a list of service resources.
             Parameters:
-                resources : List[Tuple[str, Any]]
-                    List of tuples, each containing a resource_key pointing the resource to be modified, and a
-                    resource_value containing possible additionally required values to locate the value to be removed.
+                resources: List[Tuple[str, Any]]
+                    List of tuples, each containing a resource_key pointing to
+                    the resource to be modified, and a resource_value containing
+                    possible additionally required values to locate the value
+                    to be removed.
             Returns:
-                results : List[Union[bool, Exception]]
-                    List of results for resource key deletions requested. Return values must be in the same order than
-                    resource keys requested. If a resource is properly deleted, True must be retrieved; otherwise, the
-                    Exception that is raised during the processing must be retrieved.
+                results: List[Union[bool, Exception]]
+                    List of results for resource key deletions requested.
+                    Return values must be in the same order as the requested
+                    resource keys. If a resource is properly deleted, True must
+                    be returned; otherwise, the Exception that is raised during
+                    the processing must be returned.
         """
         raise NotImplementedError()