RDF Generation and Linkingusing Open Refine

Daniel Vila-Suerodvila@fi.upm.es

Introduction

• Learn how to use Open Refine and its RDF extension• Map tabular data to RDF• Link entities to a external dataset

Overview

3

Installation

• Download Open Refine at:• http://openrefine.org/download.html

• Download the RDF Extension at:• http://refine.deri.ie/

Installing the RDF Extension

• Make sure "extensions" folder exists in your Google Refine workspace

• Download the extension• Extract the downloaded zip file to the "extensions" folder• Start/Restart Google Refine

Data

• Download available at:http://data.freeyourmetadata.org/powerhouse-

museum/phm-collection-cleaned.zip

Task 1

• Inspect the data • Pre-process if neccesary

Task 2

• Using the RDF extension map the data to RDF using a selection of vocabularies

Task 3

• Using a reconciliation service try to find entities within your data that have URIs in other dataset.

• For example the LCSH (Library of Congress Subject Heading) with the following configuration:• Name: LCSH (preprocessed)• Endpoint URL: http://sparql.freeyourmetadata.org/• Graph URI:

http://sparql.freeyourmetadata.org/authorities-processed/

• Type: Virtuoso• Label properties: check only skos:prefLabel