A random series of A random series of ideas, concepts, ideas, concepts, Platonic ideals, a Platonic ideals, a
yeoman's yeoman's miscellany, and miscellany, and
nonesuch guide to nonesuch guide to Linked Data, Linked Data,
especially as it especially as it relates to libraries, relates to libraries,
archives, and archives, and museumsmuseums
Martin R. KalfatovicSmithsonian Libraries
AAM 2012Minneapolis, MN
2 May 2012
W
WWW circa 1991
Berners-Lee Schematic
• It’s cool • “Increase and Diffusion of Knowledge”• Share, contribute to a global database• Create context around data• Allow data to be reused/repurposed by
creators and a worldwide community• Improve discoverability of content
Why Linked Open Data?
• Publishing structured data on the web• RDF (Resource Description Framework) • Enables queries computer 2 computer• uses standard ontologies (vocabularies)• data in “triples” (“triplestore”)
So Just what is Linked Data
URIhttp://library.si.edu/tl2/author/charles-darwin
Predicateowl:sameAs
Object http://viaf.org/viaf/27063124
Example of a Triplestore
Some Linked Data Buzzwords, er Standards
RDF, OWL, SPARQL, RDFa, SKOS, RDFS, GRDDL, POWDER, RIF, SAWSDL, RDB2RDF
Linked Data Design Issues
1.Use URIs as names for things.2.Use HTTP URIs so people can look up those things.3.When someone looks up a URI, provide useful
information, using the standards (RDF, SPARQL). 4. Include links to other URIs, so they can discover more
things.
http://www.w3.org/DesignIssues/LinkedData.html
“The Semantic Web isn’t just about putting data on the web. It is about making links, so that a person or machine can explore the web of data. With linked data, when you have some of it, you can find other, related, data.”
Tim Berners-Lee, Linked Data – Design Issues
On the web, openMachine-readable dataNon-Propriety formatRDF StandardsLinked RDF
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DBpedia is a community effort to extract structured information from Wikipedia and to make this information available on the Web. DBpedia allows you to ask sophisticated queries against Wikipedia, and to link other data sets on the Web to Wikipedia data.
The three sides of the tri-color cube in these logos evoke the triplet of the RDF model. The peeled back lid invites you to Open Your Data to the Semantic Web!
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Towards a Digital Public Library of America
D PL A
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Towards a Digital Public Library of America
D PL AExpand from current 100,000 record sample set to describe all of records with a common set of terms
Roll this full-size triplestore out to a publicly accessible beta.
Begin to link out to other things, e.g. VIAF
Thanks!
@UDCMRK
To:Keri Thompson
Joel RichardSuzanne Pilsk
Ed SummersTrish Rose-Sandler
Matt Phillips
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