GREL, or Google Refine Expression Language, is a language used to work with and manipulate data, cells, and columns in OpenRefine.
GREL can be utilized in a number of places in OpenRefine including:
- Adding a column based on another column
- Adding a column by fetching URLs
- Transforming cell contents
- Creating custom facets (both number and text)
NOTE: GREL is case-sensitive, meaning that (for example) "Match" and "match" will not produce the same result.
