OpenRefine (formerly Google Refine) is a powerful open-source tool for working with messy data. It's primarily used for cleaning data, transforming it from one format into another, and extending it with web services. Common use cases include data cleaning (e.g., removing inconsistencies, correcting typos), data transformation (e.g., splitting columns, merging values), and data reconciliation (matching data against external databases like Wikidata).
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