This is the RefinePro knowledge base about OpenRefine. We build it over the years, and keep adding to it. From great tutorials and how-to, to handy GREL expressions and links to external resources, you will find here one of the most comprehensive list of resources to learn OpenRefine.

For a comprehensive documentation you should refer to the official OpenRefine wiki.

Don't where to get started? Search for a specific function below, or read our most popular article from the right side menu.

29.10.21

OpenRefine October 2021 Review

Happy November to all! This month, we shared the most relevant and helpful OpenRefine October 2021 community announcements, releases, tutorials, videos, and academic publications with you.


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30.9.21

OpenRefine September 2021 Review

We wanted to wish you a very happy October! This month, we decided to share the most relevant and helpful OpenRefine September 2021 community announcements, releases, tutorials, videos, and academic publications with you.

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30.8.21

OpenRefine August 2021 Review

We wish you a happy September! This month, we decided to share the most relevant and helpful OpenRefine August 2021 community announcements, releases, tutorials, videos, and academic publications with you.


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1.8.21

OpenRefine July 2021 Review

Happy August! This month, we decided to share the most relevant and helpful OpenRefine July 2021 community announcements, releases, tutorials, videos, and academic publications with you.


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26.6.21

OpenRefine June 2021 Review

Happy July! This month, we decided to share the most relevant and helpful OpenRefine June 2021 videos, tutorials, and releases with you.


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31.5.21

OpenRefine May 2021 Review

Happy June! This month, we decided to share the most relevant and helpful OpenRefine May videos, tutorials, and releases with you.


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25.5.21

using columnName to bulk fill down columns

Thanks to this StackOverflow questionI finally found a great use case to introduce the columnName variable in OpenRefine. 

The columnName variable has been poorly documented (see previous discussions in SO and on the OpenRefine mailing list). The feature got really interesting with the All > Transform option available in OpenRefine 2.7 back in 2017 (yes, this blog post is long overdue!)