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Workshop module stores personal data in its tables, via user preference and via core_files and core_plagiarism subsystems. When exporting the data, we export not only data created by users themselves (such as their submissions and provided peer-assessments) but also all relevant data that can (or must) be used to interpret created content and evaluate the user's performance and skills. On the other hand, when deleting data at user's request, we delete only those data that do not affect other users' performance evaluation. The reasoning is that one's right for privacy does not overweight someone else's right for fair assessment. For that reason, we can't fully delete whole provided peer-assessments, for example. Because they are used in cross-comparison and grading evaluation of all other peers who assessed the same submission. So instead, we replace provided texts but still keep the original record. Workshop defines the interface for its grading strategy subplugins to allow them attach personal data under their control to the exported structures.