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data profiling
/ˈdeɪ.tə ˈproʊ.faɪl.ɪŋ/ - n.
1 [colloq.] The one-time exercise of learning what the data actually contains, scheduled for after launch.Keep. Punchy.This is the problem.
Working definition
2. The systematic examination of a dataset's structure, content, and statistics to discover its true shape, ranges, patterns, and anomalies.