Reference

Glossary

---

Glossary

---

Cell
A single data field within a row and column of a dataset.

Clustering
A method that groups together values that are similar in spelling or sound, helping identify and standardize inconsistent entries.

Column
A vertical set of related data values. Each column represents one variable or type of information.

Custom Facet
A user-defined facet based on a GREL expression that evaluates each cell and groups results (e.g., “true/false”, categories, or computed values).

Facet
An interactive filter that groups unique values in a column and shows their frequency (e.g., text facet, numeric facet).

Filter
A search-based restriction of rows. Unlike facets, filters do not summarize or group values—they only hide non-matching rows.

GREL (General Refine Expression Language)
A lightweight expression language used in OpenRefine to transform, clean, or evaluate cell values.

Keying Function
The algorithm used in clustering to transform strings into simplified “keys” so that similar values can be grouped together.

Literal Replacement
A GREL transformation that replaces a specific character or substring with another, often used to remove formatting characters.

Record
A group of one or more rows that belongs together. Used when splitting multi-valued cells so related data stays linked.

Row
A horizontal entry in the dataset, typically representing one item or observation.

Split Multi-Valued Cells
An operation that separates multiple values stored in a single cell (based on a separator) into multiple rows within the same record.

Text Facet
A facet that groups all unique text values in a column and displays their counts.

Timeline Facet
A facet used on date-type columns to visualize and filter records over time with a histogram.

Transformation
Any operation that changes the content of cells—e.g., formatting, replacements, or converting data types.

Undo/Redo
The panel showing all steps performed during a project, allowing users to undo actions or export a workflow.