Linked Data: Emblematic applications on Legacy Data in Libraries

Overview of Presentation Linked Data: Introduction – Evolution of Syntactic Web to Linked Web – Linked Data Working Principles Current Trends & Implementations Linking Legacy Data – Annotating Text Data & Publishing Legacy Data as Linked Data Conclusion 11/28/20152

Evolution of Syntactic Web to Linked Web 11/28/20153 Linked Web Semantic Web Syntactic Web Web of Documents, Human clickable hyperlinks, Web 1.0, Web 2.0, Content not well structured Can’t ask expressive queries Can’t process content within applications Web of Data Web 3.0 Machine Processable & Understandable, Data sets Isolated, unconnected Meaningful Links between related Data sets, Making Web like a single global database

Need for Linked Data To enhance re-usability, findability & visibility of our data Publish structured data directly on the Web in addition to classic HTML pages. Different Approaches – Microformats – Web APIs & Mashups » APIs slice the Web into separate data silos – Linked Data 11/28/20154 Christian Bizer: How to Publish Linked Data on the Web - Introduction (10/27/2008)

The Web of Linked Data 11/28/20155  Use Semantic Web technologies to  publish structured data on the Web,  set links between data from one data source to data within other data sources

Linked Data Working Principles Use URIs as names for things. Use URIs, so that people can look up those names. When someone looks up a URI, provide useful information, using the standards (RDF). Include links to other URIs, so that they can discover more things. Tim Berners-Lee /28/20156

URIs to identify people & relationships 11/28/

Implementation in OCLC Worldcat 11/28/20158

Facts about few others NameSoftwareEventsReasoning SPARQL Endpoint TriplesLicense LCSH MarkLogic & 4Store Yes More than 300 million Open EurovocSesameNo YesN/A Not Open Wordnet 3.03StoreYes More than 2 million Open 11/28/20159

OpenRefine(ex-Google Refine) Free, open source tool used for Cleaning messy data & Linking it to data sets like Freebase, DBpedia, Europeana etc. Survey result of 2014 reflects Librarians as largest user base. 11/28/2015 Image Source : logo.svg 10

Linked Media Framework Server application that bundles central Semantic Web technologies such as LMF Core :Linked Data Server that allows to expose data following the Linked Data Principles. LMF Modules :Used to extend the functionality of the Linked Media Server. LMF Usage Scenarios :Publishing Legacy Data as Linked Data, Building Semantic Search over Data 11/28/2015Image Source: 11

Hostel Library Records 11/28/2015 Data Entry by : 12

Reconciliation against DBpedia writer Ontology 11/28/201513

11/28/2015Editing RDF Skeleton Continued… 14 Configuring Triples

RDF Skeleton of the Project 11/28/2015 Editing RDF Skeleton Continued… 15

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RDF/XML using OpenRefine & csv2rdf 11/28/ Robert Silverberg Passengers (short story) 1 Robert Silverberg 1 Passengers (short story) 1 OpenRefine output csv2rdf output

Conclusion Linked Data converts the whole web into a single database Designed for machines and humans. Links between concept-concept and concept-and its description. Encourages reuse, reduces repetition. Enables to add more value to data over the network. People can more easily find library resources on the web. More creative applications based on library metadata 11/28/201518

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