the strongest link: libraries and the web of linked datathe strongest link: libraries and the web of...
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The Strongest Link: Libraries and the Web of Linked Data
Gillian Byrne & Lisa GoddardMemorial University of Newfoundland
Emerging Technologies in Academic Libraries 2010Trondheim, Norway - April 2010
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What is Linked Data?
• To employ the RDF data model to publish structured data on the Web.
• To [use http URIs] to set explicit RDF links between data items within different data sources.
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RDF Triples
Data model for writing simple statements about web objects.
RDF statements are written as “triples”.
Subject Object
Shakespeare Macbeth
Predicate
Wrote
V
Statement
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RDF Triples
Subject Predicate Object
ShakespeareShakespeareAnne HathawayShakespeareStratfordMacbethEnglandScotland
WroteWroteMarriedLived inIs inSet in Part ofPart of
King LearMacbethShakespeareStratfordEnglandScotlandUKUK
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RDF Graph: A Semantic Net
AnneHathaway
Shakespeare
Stratford
UK
Macbeth
KingLear
Scotland
England
married
wrote
wrote
isIn
setIn
lived
In
partO
f
partOf
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Linking Data
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Linking Data
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Linking Hubs
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RDF Challenges
• Identify people, places, things, and concepts in unstructured text documents
• Named entity extraction
• Term disambiguation
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Library RDF Converters
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MARC2RDF Modeler
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MARC2RDF Output
<rdf:Description xmlns:n1="http://RDVocab.info/Elements/" xmlns:n2="http://purl.org/dc/terms/" xmlns:n3=http://purl.org/dc/elements/1.1/about="http://library.cca.edu/core/m/76079693"><n1:statementOfResponsibility>J. Garth Taylor</n1:statementOfResponsibility><n2:contributor rdf:resource="http://library.cca.edu/core/people/taylor_j_garth_1941-_james_garth"/><rdf:type rdf:resource="http://vocab.org/frbr/core#Manifestation"/><n2:type>Slide</n2:type><n2:date>1986</n2:date><n3:subject>Labrador</n3:subject><n2:subject rdf:resource="http://library.cca.edu/core/s/labrador#concept"/>...</rdf:Description>
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Dublin Core to RDF
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OAI2RDF
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OAI2RDF Output
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:default95="http://purl.org/dc/elements/1.1/">
<rdf:Description rdf:about="oai:collections.mun.ca:m_forbes/544"> <default95:contributor>Forbes Family</default95:contributor> <default95:contributor>Glenn Deir, 1997</default95:contributor> <default95:date>1887</default95:date> <default95:description>1 photograph : b&w ; 9 x 6 cm</default95:description> <default95:description>Irene (Matthews) Forbes, as a baby.</default95:description><rdf:type rdf:resource="http://www.ontoweb.org/ontology/1#Publication"/>
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BibTeX to RDF
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Simile RDFizers
http://www.mulgara.org/
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RDF Publishing Tools
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Semantic Blogging: Zemanta
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Semantic Blogging: Zemanta
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Related Media
RelatedTags
RelatedArticles
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Calais Semantic Extraction
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Calais Semantic Extraction
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Entity Extraction
RelatedTags
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Semantic MediaWiki
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Semantic MediaWiki
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Semantic MediaWiki
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Semantic MediaWiki
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Semantic MediaWiki
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Drupal 6 CMS
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Drupal 6 CMS
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Drupal CMS
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Drupal 7 CMS
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Drupal 7 RDFa - Visinav
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Library RDF Publishing Tools
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Dspace & RDF
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Dspace & RDF
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Dspace & RDF
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Fedora & RDF
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Fedora & RDF
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Fedora & RDF
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Eprints & RDF
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Eprints & RDF
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Library Linking Hubs
Linked Data is about reusing existing ontologies and data as far as possible – so it isn’t just about about allowing users to link to our data, but linking when the data already exists.
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Subject linking: loc.id.gov
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Subject linking: loc.id.gov
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Subject linking: loc.id.gov
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Virtual International Authority File
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Virtual International Authority File
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Authority Linking: VIAF
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Linked Marc Records
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RDF Book Mashup
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Linked Periodicals Data
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RKBExplorer - Publication
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RKBExplorer - Person
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RKBExplorer - Project
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RKBExplorer - Organization
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What’s the promise?
• Better, smarter discovery• Enriched content• Enhanced personalization
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Smarter linking
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Data integration
LibraryCatalog
ue
ERM Database
ISxNs, OCLC Numbers, Title
LibraryCatalog
ue
ERMDataba
se
Ontologies
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Madonna at Raphael's nightclub (NSFW)
Raphael's Madonna (NSFW)
<img src=“09821.jpg” alt=“madonna”>
Disambiguation
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Related Works to Relationships
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Enriched content
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Julie
Student
Is patron type
Takes course
Has
major
History
CitationHas reading
Hist102
Enhanced personalization
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The Holy Grail?
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What are the obstacles?
• Privacy• Trust• Data ownership• It’s…well…hard
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Privacy/Trust
The largest hurdle to library adoption of Linked Data, though, may not be educational or technological …The sticking point for librarians may be an issue of trust. - Ross Singer, “Linked Data Now!”
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Data ownership
LibraryCatalog
ue
Digital Archive
Database
Repository
Ejournal
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Rocking the foundations
• MARC• RDA• DCMI/RDA Task Group
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What can we do…now?
• Eric Miller noted in a 2004 talk that libraries have four major roles in the semantic web:
1. exposing collections – use Semantic Web technologies to make content available;
2. web'ifying thesaurus/mappings/services;3. sharing lessons learned;4. persistence.
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Exposing collections
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web'ifying thesaurii, etc.
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Sharing lessons
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Persistence