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0001 # DataFormats/Scouting
0002
0003 ## Scouting Data Formats
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0005 Any changes to the Scouting data formats must be backwards compatible. In order to ensure the Scouting formats can be read by all future CMSSW releases, there is a `TestRun3ScoutingDataFormats` unit test, which makes use of the `TestReadRun3Scouting` analyzer and the `TestWriteRun3Scouting` producer. The unit test checks that the objects can be read properly from
0006
0007 * a file written by the same release
0008 * files written by (some) earlier releases
0009
0010 If the persistent format of any Scouting data format gets changed in the future, please adjust the `TestReadRun3Scouting` and `TestWriteRun3Scouting` modules accordingly. It is important that every member container has some content in this test. Please also add a new file to the [https://github.com/cms-data/DataFormats-Scouting/](https://github.com/cms-data/DataFormats-Scouting/) repository, and update the `TestRun3ScoutingDataFormats` unit test to read the newly created file. The file name should contain the version numbers of the data format classes (from classes_def.xml) in alphabetical order (they are in this alphabetical order already in classes_def.xml) and the release or pre-release with which it was written. If the latest file of Run 3 scouting before the update has not been used in data taking, the file can be deleted.
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0012 There are analogous tests for Run 2. It is unlikely those formats will change anymore. There will probably be analogous tests added in the future for runs after Run 3 which will need similar maintenance.