+- For helping in the migration tests and other scenarios in which you don't want
+to destroy the deployments immediately, the following tags are used:
+ - `prepare`: for the tests that are used to deploy the network
+ services under test
+ - `verify`: for the tests that perform the actual testing, or changes for
+ additional verifications (e.g. scaling).
+ - `cleanup`: already described above.
+
+ So, for instance, you could first deploy a number of network services executing
+ the tests with "prepare" tag, migrate to another OSM version, and then
+ check the behavior executing with the "verify" tag. Finally, use the "cleanup"
+ tag.
+
+## Post-processing Robot output files
+
+The output files of Robot include tyipically three files:
+
+- `report.html`: overview of the test execution results in HTML format
+- `log.html`: details about the executed test cases in HTML format
+- `output.xml`: all the test execution results in machine readable XML format
+
+More information about these files [here](https://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html#output-file).
+
+It is possible to use the tool `rebot`, included as part of the Robot Framework, to post-process the output file `output.xml`.
+
+```bash
+# To re-generate log and report from output.xml:
+rebot [-d <output_folder>] output.xml
+
+# To re-generate log and report (and optionally new output.xml) to include only certain tags:
+rebot [-d <output_folder>] -i <tag1> -i <tag2> ... -i <tagN> [-o <new_output_xml>] output.xml
+
+# To re-generate log and report (and optionally new output.xml) excluding certain tags:
+rebot [-d <output_folder>] -e <tag1> -e <tag2> ... -e <tagN> [-o <new_output_xml>] output.xml
+
+# To merge several test executions:
+rebot [-d <output_folder>] --merge output1.xml output2.xml ... outputN.xml
+```
+
+More information about post-processing Robot output files [here](https://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html#post-processing-outputs)
+