Linked data - NCompass presentation

LINKED DATA AND LIBRARIES: AN OVERVIEW Robin Hastings

NEKLSrhastings@nekls.org

TODAY’S TOPICS What is linked data? How is linked data being used right now?

BIBFRAME Open Library

What are some potential uses for linked data? Extending library data’s reach Reduce, Reuse, Recycle

More info: Previous NCompass Live episode at https://nlc.nebraska.gov/scripts/calendar/eventshow.asp?ProgID=14798 (Life after MARC - Cataloging Tools of the Future

This presentation:

WHAT IS LINKED DATA?

Photo Credit: https://www.flickr.com/photos/12033805@N00/2268295018/ - gerlos via Compfight - https://creativecommons.org/licenses/by-sa/2.0/

ESSENTIAL PRINCIPLES: Use URIs (Universal Resource Identifiers) as names for objects

Use HTTP URIs so people can look up those names

Provide information (at the URI) in standard form (RDF, JSON, Turtle, etc.)

Include links to other URI objects so that other objects can be discovered via links

Tim-Burners Lee, back in 2006

SEMANTICS & LINKED DATA

Photo Credit: https://openclipart.org/detail/140701/brain

RDA VS. RDFResource Description and Access (RDA)

Library-land created Describes and provides access points

for bibliographic information means of encoding metadata for

library resources Structured on FRBR Can be expressed in multiple

“languages” such as MARC21, BIBFRAME, etc.

Content descriptor, not a specific format

Resource Description Framework (RDF) WWW created Describes and provides access points

for semantically valid information on the web

means of encoding metadata for web-based resources

Structured on semantic language (OWL - Working Ontology Language)

Can be expressed in multiple “languages” such as XML, Turtle, etc.

MARC RECORD

http://kcoyle.net/bibframe/BFbook.html

BIBFRAME 1

http://kcoyle.net/bibframe/BFbook.html

BIBFRAME 2

http://kcoyle.net/bibframe/BFbook.html

BIBFRAME 3Includes Access points (Subjects, Authorities) -->

http://kcoyle.net/bibframe/BFbook.html

http://kcoyle.net/bibframe/LCbook.html

4 Main Classes

WORK - a resource reflecting a conceptual essence of the cataloging resource. (Audio, Text, title, creator, place)

INSTANCE - a resource reflecting an individual, material embodiment of the Work. (extent, format, frequency) AUTHORITY - a resource reflecting key authority concepts that have defined relationships reflected in the Work and Instance. (agent, place, temporal, topic)

ANNOTATION - a resource that enhances our knowledge about another resource when knowing, minimally, 'who' is doing the annotating is important. (reviews, etc.)

The BIBFRAME Vocabulary is comprised of the RDF properties, classes, and relationships between and among them. (bibframe.org)

OPEN LIBRARYOne page per book for every book published everRecord available in RDF or JSON web formats

By Max Schmachtenberg, Christian Bizer, Anja Jentzsch and Richard Cyganiak - http://lod-cloud.net/, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=36956792

Photo Credit: https://openclipart.org/detail/209658/food-pumpkin-pie

CURRENT USES OF LINKED DATA

Linked Data = Knowledge Graph

Google, Facebook, etc. all use LinkedData to provide knowledge (see hours,phone number, map based on address, Wikipedia entry, etc.)

Schema.org - the linked data standardused by Google -->

US GOV’T LINKED DATA Local severe weather warning systems in Missouri

Product recall data from fed government

Higher Ed datasets, including information on every institution of higher education that participates in the federal student financial aid programs

USES FOR LINKED DATA OUTSIDE THE US England: British National Bibliography (bnb.data.bl.uk) - working on

creating a repository of linked data objects based on national library holdings

Germany: Culturegraph1 - linked open data service that intends to create an individual information object for each kind of material held by libraries

in Germany (http://www.dnb.de/EN/Service/DigitaleDienste/LinkedData/linkeddata_node.html)

England: https://openclipart.org/detail/221971/big-ben-tower-illustrationGermany: https://openclipart.org/detail/240797/germany-map-flag-2

REDUCE, REUSE, RECYCLEReduce - the amount of work going into reinventing the record at each library (at least somewhat)

Reuse - the library’s data in new and exciting ways, taking advantage of linked open data on the web

Recycle - Shared MARC records - even more sharing with common URIs that all libraries can use

https://openclipart.org/detail/177461/mike-the-mic-question