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Presentation at the Upper Midwest Digital Collections Conference August 19, 2014
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What flavor of linked data is best for your collec6on?
Debra Shapiro UW-‐Madison SLIS
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… using other methods.
… useful It builds upon standard Web technologies such as HTTP, RDF and URIs, but rather than using them to serve web pages for human readers, it extends them to share informaHon in a way that can be read automaHcally by computers. This enables data from different sources to be connected and queried.
Strawman
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make your stuff available on the Web (whatever format) under an open license make it available as structured data (e.g., Excel instead of image scan of a table use non-‐proprietary formats (e.g., CSV instead of Excel) use URIs to denote things, so that people can point at your stuff link your data to other data to provide context h[p://5stardata.info/
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h[p://vimeo.com/36752317
What is europeana?
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• T-‐Shirt is the subject (resource you’re describing) • Color is the property (relaHonship) • White is the object
h[p://www.linkeddatatools.com/introducing-‐rdf
RDF triples, HUH??
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Richard Wallis, for OCLC, 2014
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To summarize:
• Linked data is: • Method for gecng authoritaHve descripHve data from Libraries, Archives & Museums out onto the web, so that it can be recombined with all the other data stuff garbage out there
• Two main problems brain benders for LAMs community:
• Linked data is atomized • Lined data is dynamic
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Just two flavors today
1. RDFa/HTML microdata – Schema.org – OCLC’s deployment of Schema.org
2. RDF/XML – BIBFRAME – Europeana
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What is Schema.org?
“ html tags, that webmasters can use to markup their pages in ways recognized by major search providers ”
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What is BIBFRAME?
“In addiHon to being a replacement for MARC, BIBFRAME serves as a general model for expressing and connecHng bibliographic data. A major focus of the iniHaHve will be to determine a transiHon path for the MARC 21 formats while preserving a robust data exchange that has supported resource sharing and cataloging cost savings in recent decades.”
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RDFa/HTML vs. RDF/XML • Linked data in HTML way to enrich the html of web pages – that can be displaying collecHon informaHon – Schema.org originally designed for e-‐commerce; vocabulary being extended for cultural heritage informaHon
– OCLC doing this automaHcally • RDF/XML way to re-‐encode metadata in a linked data consumeable way – BIBFRAME is an experiment to convert MARC to linked data in RDF/XML
– ExisHng MARC data can be batch transformed to BIBFRAME; Europeana also harvests metadata & re-‐encodes
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What I recommend
• Become a joiner – – Expose metadata – Big iniHaHves like europeana and DPLA can ingest all kinds of metadata – including MARC
– OCLC is shiling everyone to the WorldShare Metadata CollecHon Manager – MARC, MARCXML, MODS, DC, all kinds of data from publishers and Hathi Trust …
• Educate yourself – see bibliography • Advocate for openness
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What I believe
• Don’t lose sleep! • Linked data is for discovery • Content, Data & ProperHes -‐ RULE • < >, encoding, screens & screens of RDF, Do not ma[er as much as Quality metadata that can be shared
• CONTEXT Linked data is HUGE opportunity for librarians, archivists, collecHon managers
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Why should we be interested in doing this again?
• Get LAMs data out on the open web? • Make Google happy? • Context? • Openness and accessibility? • Torture librarians & collecHon managers …. " All of the above
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LODLAM Training Day $75
Sites cited « W3C h[p://www.w3.org/standards/semanHcweb/data
« Linkeddata.org h[p://linkeddata.org/ « What is linked data video h[p://vimeo.com/36752317 « Schema.org h[p://schema.org « European Linked Open data h[p://pro.europeana.eu/linked-‐open-‐data
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Sites cited « BIBFRAME h[p://bibframe.org/
« LoC Linked Data Service h[p://id.loc.gov/ « Zepheira/LibHub h[p://www.libhub.org/ « WorldCat Linked Data Vocabularies
h[ps://www.oclc.org/developer/develop/linked-‐data/worldcat-‐vocabulary.en.html
« Linked data demysHfied h[p://goo.gl/vezuZw
« LODLAM h[p://lodlam.net/ « Zepheira/LibHub h[p://www.libhub.org/ 45