README.md

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1 2 3 4 5 6 7 8 9 10	`# DataFormats/DetId` ## `std::vector<DetId>` The type `std::vector<DetId>` is part of the RAW data, and any changes must be backwards compatible. In order to ensure it can be read by all future CMSSW releases, there is a `TestVectorDetId` unit test, which makes use of the `TestReadVectorDetId` analyzer and the `TestWriteVectorDetId` producer. The unit test checks that the object can be read properly from `* a file written by the same release` `* files written by (some) earlier releases` If the persistent format of class `std::vector<DetId>` gets changed in the future, please adjust the `TestReadVectorDetId` and `TestWriteVectorDetId` modules accordingly. It is important that every member container has some content in this test. Please also add new files to the [https://github.com/cms-data/DataFormats-DetId/](https://github.com/cms-data/DataFormats-DetId/) repository, and update the `TestVectorDetId` unit test to read the newly created files. There should be one file written with split level 0 and one with split level 99. The file name should contain the release or pre-release with which it was written and the split level.

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#  DataFormats/DetId

## `std::vector<DetId>`

The type `std::vector<DetId>` is part of the RAW data, and any changes must be backwards compatible. In order to ensure it can be read by all future CMSSW releases, there is a `TestVectorDetId` unit test, which makes use of the `TestReadVectorDetId` analyzer and the `TestWriteVectorDetId` producer. The unit test checks that the object can be read properly from

* a file written by the same release
* files written by (some) earlier releases

If the persistent format of class `std::vector<DetId>` gets changed in the future, please adjust the `TestReadVectorDetId` and `TestWriteVectorDetId` modules accordingly. It is important that every member container has some content in this test. Please also add new files to the [https://github.com/cms-data/DataFormats-DetId/](https://github.com/cms-data/DataFormats-DetId/) repository, and update the `TestVectorDetId` unit test to read the newly created files. There should be one file written with split level 0 and one with split level 99. The file name should contain the release or pre-release with which it was written and the split level.