Question about unknown parameter- I am not a coder

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Hey, I am operating with a OpenCV 3D scanner, but I am not a programmer. I like to get known more about the calibration output files (cam_rotation_vectors.xml, cam_translation_vectors.xml, cam_extrinsic.xml, .... as well as for the projector). Which data are presented in each of these files? For example got data in a 8x3 matrix for cam_translation_vectors.xml. Thise format does not fit to anything I found decumentated in online tutorials. Many thanks!