updated README

notifications-plugins/README.md

@@ -88,7 +88,7 @@ and
 * `LAST_INVOKED_STEP` (optional) can be: `SUBMIT-FOR-REVIEW​`, `APPROVE-SUBMITTED`, `REJECT-DRAFT​`, `UNPUBLISH`;
 * `NOTIFICATION_TYPE` (mandatory) can be: `USER_NOTIFICATION`, `VRE_POST`, `EMAIL`;
 
-***Notifications_Messages.properties*** managed/known placeholders:
+**PLACEHOLDER_MESSAGE_{N}.properties** managed/known placeholders:
 
 * `${project_name}`
 * `${project_id}`
@@ -100,10 +100,31 @@ and
 * `${user_caller}`
 
 
+e.g. Messages using the placeholders:
+
+```txt
+# REVIEW ACTION
+TITLE_REVIEW_REQUIRED=Review required for ${project_name}
+MSG_REVIEW_REQUIRED=@${user_caller} submitted the project ${project_name}. You are kindly requested to review it and decide either to APPROVE or REJECT it. See the Project at ${private_data_entry_link}
+# REJECTED ACTION
+TITLE_ITEM_REJECTED=Rejected ${project_name}
+MSG_ITEM_REJECTED=The project ${project_name} (id: ${project_id}) has just been rejected by @${user_caller}. See the Project at ${private_data_entry_link}
+# REJECTED ACTION
+TITLE_ITEM_REJECTED_REVIEW_REQUIRED=Rejected ${project_name}
+MSG_ITEM_REJECTED_REVIEW_REQUIRED=The project ${project_name} has just been rejected. You are kindly requested to review it. See the Project at ${private_data_entry_link}
+```
+
+[See here a full file with messages](https://code-repo.d4science.org/gCubeSystem/gcube-cms-suite/raw/branch/event_manager/D4S_UCDs/DEV/devVRE/notifications/Notifications_Messages.properties)
+
+
 ## Change log
 
 See [CHANGELOG.md](CHANGELOG.md).
 
+## Authors
+
+* **Francesco Mangiacrapa** ([ORCID](https://orcid.org/0000-0002-6528-664X)) Computer Scientist at [ISTI-CNR Infrascience Group](http://nemis.isti.cnr.it/groups/infrascience) 
+
 ## License
 
 This project is licensed under the EUPL V.1.1 License - see the [LICENSE.md](LICENSE.md) file for details.