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Using OpenRefine
Table of Contents
Using OpenRefine
Credits
Foreword
About the Authors
About the Reviewers
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Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Downloading the example files
Errata
Piracy
Questions
1. Diving Into OpenRefine
Introducing OpenRefine
Recipe 1 – installing OpenRefine
Windows
Mac
Linux
Recipe 2 – creating a new project
File formats supported by OpenRefine
Recipe 3 – exploring your data
Recipe 4 – manipulating columns
Collapsing and expanding columns
Moving columns around
Renaming and removing columns
Recipe 5 – using the project history
Recipe 6 – exporting a project
Recipe 7 – going for more memory
Windows
Mac
Linux
Summary
2. Analyzing and Fixing Data
Recipe 1 – sorting data
Reordering rows
Recipe 2 – faceting data
Text facets
Numeric facets
Customized facets
Faceting by star or flag
Recipe 3 – detecting duplicates
Recipe 4 – applying a text filter
Recipe 5 – using simple cell transformations
Recipe 6 – removing matching rows
Summary
3. Advanced Data Operations
Recipe 1 – handling multi-valued cells
Recipe 2 – alternating between rows and records mode
Recipe 3 – clustering similar cells
Recipe 4 – transforming cell values
Recipe 5 – adding derived columns
Recipe 6 – splitting data across columns
Recipe 7 – transposing rows and columns
Summary
4. Linking Datasets
Recipe 1 – reconciling values with Freebase
Recipe 2 – installing extensions
Recipe 3 – adding a reconciliation service
Recipe 4 – reconciling with Linked Data
Recipe 5 – extracting named entities
Summary
A. Regular Expressions and GREL
Regular expressions for text patterns
Character classes
Quantifiers
Anchors
Choices
Groups
Overview
General Refine Expression Language (GREL)
Transforming data
Creating custom facets
Solving problems with GREL
Index
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