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Linked data for Libraries, Archives, Museums

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General introduction to Linked Data concepts presented to Maryland Library Association Technical Services Division at "Tech Services on the Edge" forum

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Linked data for Libraries, Archives, Museums

  1. Linked Datafor Libraries, Archives, Museums
  2. Learning objectives•Define the concept of linked data•State 3 benefits of creating linked data and making it available•Outline the process of creating LD•State how to make use of LD created by others
  3. Basic Terms
  4. Linked Data (LD)"a term used to describe a recommendedbest practice for exposing, sharing, andconnecting pieces of data, information, andknowledge on the Semantic Web usingURIs and RDF." http://linkeddata.org/faq
  5. Linked Open Data (LOD) Linked Data that is explicitlypublished under an open license.Not all Linked Data will be open, and not all Open Data will be linked
  6. LOD-LAM Linked Open Data inLibraries Archives Museums #lodlam
  7. URI Uniform Resource IdentifierA string of characters used to identify a name or resource on the Internet
  8. RDF Resource Description Framework“a metadata data model. It has come to be usedas a general method for conceptual descriptionor modeling of information that is implementedin web resources, using a variety of syntaxformats.” Wikipedia
  9. RDFDefined statements compromising asubject, a predicate (property), andan object.These statements are called “triples”
  10. SPARQLSPARQL protocol and RDF Query LanguageSPARQL Endpoint: “URL for a given set of RDF datathat you can send queries to and get answers from” Dorothea Salo
  11. Linked Data (LD)Linked data “describes a method of publishing structured dataso that it can be interlinked and become more useful. It buildsupon standard Web technologies such as HTTP and URIs, butrather than using them to serve web pages for human readers, itextends them to share information in a way that can be readautomatically by computers. This enables data from differentsources to be connected and queried” Wikipedia definition
  12. Web of documents vs. Web of data
  13. resource links to to links resource links to links to links to links to resource links to links to links to resourceresource Diagram by Emily Nimsakont
  14. data links to data data data links to datadata links to data data data data links to data data data data data Diagram by Emily Nimsakont
  15. Relationship grammar relatedTo Resource B Resource ADescribe resources using interrelated “statements” (RDF triples)Use URIs – unique globally managed identifiers as the “words” ofthe statement Slide by DCMI tutorial “What makes the Linked Data Approach Different”
  16. Traditional metadata = Implicit Relationships MARC Bibliographic Record 100 10 Smart, Laura J. ǂq (Laura Jean), ǂd 1971- 245 00 Women in Science ǂh [electronic resource].
  17. Linked Data is Explicit isCreatorOf Women in ScienceLaura J. Smart isTitleOfWomen in Science sdsc.edu/ScienceWomen Object – predicate - subject
  18. Triple with URIsLaura J. Smarthttp://viaf.org/viaf/171972263is creator ofhttp://purl.org/dc/terms/creatorWomen in Sciencehttp://www.sdsc.edu/ScienceWomen
  19. Under the hood<?xml version="1.0" encoding="utf-8"?><rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"xmlns:dc="http://purl.org/dc/elements/1.1/"<rdf:Descriptionrdf:about="http://www.sdsc.edu/ScienceWomen"><dc:title>Women in Science</dc:title><dc:creator dc:source="http://viaf.org/viaf/171972263/"rdfs:Literal="Laura J. Smart" /></rdf:Description></rdf:RDF>
  20. It’s the data, stupid.“We’re not dealing with recordsanymore. We are working withinterrelated nodes of data” Diane Hillmann
  21. What does it really look like?“Thisis kind of like asking whatelectricity looks like: it doesnt somuch look like anything, as itmakes certain things possible” Karen Coyle
  22. Thinkbasehttp://thinkbase.cs.auckland.ac.nz/start.jsp
  23. Benefits of creating/using Linked Data• Sharable• Extensible• Reusable• Multi-lingual• Reduce redundancy• Improve discoverability• Sophisticated navigation
  24. Benefits of creating/using Linked Data• Enhanced publications• Facilitate research• Separate semantics from syntax• Persistent URIs an aid to digital preservation• Drive users to your site• Collaborate with less licensing hassle (LOD)
  25. All the kids are doing it“The new bibliographic frameworkproject will be focused on the Webenvironment, Linked Data principlesand mechanisms, and the ResourceDescription Framework (RDF) as abasic data model.” LC Bibliographic Framework for the Digital Age http://www.loc.gov/marc/transition/news/framework-103111.html
  26. How to? “Learn about Resource Description Framework. Never look back.” Rurik Greenall, Norwegian Institute Science & TechnologyOther prerequisites: HTML. URIs.
  27. Berners-Lee Basic Linked Data Principles1. Use URIs as names for things2. Use HTTP URIs so that people can look up those names3. When someone looks up a URI, provide useful information, using the standards (RDF, SPARQL)4. Include links to other URIs. so that they can discover more things.
  28. Source: Heath & Bizer http://linkeddatabook.com/editions/1.0/
  29. The process: 1st get your dataFeynman, Richard Phillips, 1918-1988LCCN: n 50002729http://viaf.org/viaf/44298691http://lccn.loc.gov/n50002729
  30. The process: Get your data into RDF/XMLFrom here: Name LCCN Robert B. Phillips n 00014131 Keith C. Schwab nr2002032640To here: Robert Phillips http://lccn.loc.gov/n00014131 Creator http://purl.org/dc/terms/creator Book title http://openlibrary.org/books/OL11358296M Physical biology of the cell
  31. The process: Expose that data
  32. Learning objectives•Define the concept of linked data•State 3 benefits of creating linked data and making it available•Outline the process of creating LD•State how to make use of LD created by others
  33. Thanks!library.caltech.edu/laura

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