diff --git a/journal/2021-06-06--13-43-12Z--service_oriented_programming.org b/journal/2021-06-06--13-43-12Z--service_oriented_programming.org
index 9e1d64d6..549fc275 100644
--- a/journal/2021-06-06--13-43-12Z--service_oriented_programming.org
+++ b/journal/2021-06-06--13-43-12Z--service_oriented_programming.org
@@ -30,3 +30,6 @@ Every service should have the following structure:
 - =test/=
   + =service_test= the service test
   + =core_test= the tests for pure functions
+
+
+A service should be considered as a function returning a record of functions.