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Linked Library Data. Tuning Library Metadata for the [Semantic] Web. Presented 2011-03-16 ALCTS RDA Webinar Series   Corey A Harper. Topical Overview. Semantic Web & RDF Intro Linked Open Data [Linked] Library Data Resource Description and Access (RDA) Beyond MARC As RDF Vocabularies

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linked library data

Linked Library Data

Tuning Library Metadata for the [Semantic] Web

Presented 2011-03-16ALCTS RDA Webinar Series   Corey A Harper

topical overview
Topical Overview
  • Semantic Web & RDF Intro
  • Linked Open Data
  • [Linked] Library Data
  • Resource Description and Access (RDA)
    • Beyond MARC
    • As RDF Vocabularies
  • Broader Interoperability
  • Small steps forward…

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

semantic web
Semantic Web
  • TBL’s original vision
    • “Weaving the Web” – 1999
  • Then: Focus on Machine Reasoning
    • Scientific American Article
  • Now: Focus on things & links
    • Reasoning & Inferencing less central

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

semantic web1
Semantic Web
  • Originally:
    • Metadata standard built on XML
    • Metadata about “Web” things (documents)
  • Eventually:
    • Metadata about all sorts of things
    • And about relationshipsbetween things
  • What are the “things”?

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

semantic web terminology
Semantic Web Terminology
  • Resource: Any “thing”
  • Class: Abstraction of a type of thing
  • Individual: An instance of a class
  • Property: An attribute of an individual
  • Statement/Triple:
    • A Resource (subject)
    • A Property (predicate / verb)
    • A Value (object) - Nodes
  • Graph: Visual Representation of statements
  • Ontology: A domain specific collection of classes and properties

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

semantic web terminology1
Semantic Web Terminology
  • Nodes: The Subjects and Objects in a Graph
  • Arcs: The Predicates in a Graph
  • Domains and Ranges: Constraints on Nodes
    • Domain: What things can be subjects
    • Range: What things (or strings) can be objects
  • Literals: Values as strings rather than things
  • Named Graphs: Graphs with URIs treated as nodes.

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

slide7
Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

linked open data
Linked Open Data
  • Use URIs as names for things
  • Use HTTP URIs so that people can look up those names.
  • When someone looks up a URI, provide useful information.
  • Include links to other URIs. so that they can discover more things.

http://www.w3.org/DesignIssues/LinkedData.html

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

slide9
Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

slide10
Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

slide11
Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

data in the cloud
Data in the Cloud
  • Hubs in the May 2008 Version:
    • FOAF
    • DBPedia
  • Myriad Sources coming online:
    • Thompson Reuters
    • New York Times
    • British Broadcasting Corporation
    • Government Data (UK, US and more)
    • Google and Facebook
    • More and More Library, Archive and Museum Data
  • Geonames
  • MusicBrains

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

dbpedia
DBpedia
  • Structured Wikipedia Data
  • Genres, Influences, External Links
  • Multi-lingual / Multi-script labels
  • Rich Semantics
  • Many linkages to other datasets

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

dbpedia model
DBpedia Model
  • Partial basis in data entry conventions
  • InfoBox’s, and InfoBox Templates
  • Metadata Entry Format
  • Partial source of Ontology
    • Class Structure
    • Vocabulary Design

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

dbpedia1
DBpedia
  • 3.4 Million “things” described
  • Ontology based on “infoboxes”
    • 1.5 million things classified
    • http://wiki.dbpedia.org/Ontology
  • Approx. 50,000 “Properties”
    • Approx. 1,200 defined in ontology

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

what things are in our data
What *things* are in our data???

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

slide20

…Librarydata is

extremely

complicated

library metadata
Library Metadata
  • Rich stores of MARC, MODS, &c.
  • Robust Controlled Vocabularies
    • Subject Heading lists
    • Code lists
    • Thesauri
  • Emerging data model in FR*

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

bibliographic vocabs
Bibliographic Vocabs
  • Bibliographic Ontology (Bibo)
    • Zotero, Omeka, EPrints and Others
  • FRBR – unofficial
    • And now Official (Thank you IFLA!)
  • ISBD
  • Resource Description and Access (RDA)

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

linked library archive museum data
Linked Library [Archive, Museum] Data
  • LIBRIS (Swedish Union Catalog)
  • Library of Congress (LCSH, OSI)
  • German National Library
  • Hungarian National Library
  • British Library
  • Europeana
  • Archives Hub & LOCAH

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

library authority data
Library Authority Data

“Include links to other URIs. so that they can discover more things.”

Short of providing and linking to URIs, this *is* authority data.

This is what our authority files are for.

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

library controlled vocabularies benefits
Library Controlled Vocabularies: Benefits
  • Reputation - Trusted Tradition
  • Mature - Time tested and carefully developed
  • General & Comprehensive - Cover large knowledge spaces

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

slide26
SKOS
  • Simple Knowledge Organization System
  • Properties and Classes for describing Controlled Vocabulary
  • Heavily used in Linked Library Data
    • id.loc.gov
    • Virtual International Authority File (VIAF)

skos:primaryTopic

bibo:book

skos:subject

Harper - Linked Library Data - RDA Webinar Series

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other vocabularies
Other Vocabularies
  • Thesaurus for Economics
  • French Subject Headings
  • Swedish Subject Headings
  • IconClass (not on web yet)
  • OCLC Terminology Services
  • Dewey Decimal Classification
  • Virtual International Authority File
  • Metadata Authority Description Schema (MADS)

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

resource description and access
Resource Description and Access
  • Current focus on MARC
    • Much criticism
    • Within MARC, not a tremendous change
    • Different problems outside of MARC
  • Possible focus outside of MARC
    • RDA as realization of FRBR
    • RDA as Metadata Vocabularies
    • RDA as related to Bibo

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

rda as metadata vocabularies
RDA as Metadata Vocabularies

Slide Adapted from Diane Hillmann

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

RDA elements, roles and vocabularies have been provisionally registered

IFLA FRBRer and ISBD elements and vocabularies have been officially registered

Discussions about long term maintenance of both RDA and the vocabularies

Effort to create multi-language RDA Vocabularies

metadata registries
Metadata Registries
  • Formerly NSDL Registry
    • Now “Open Metadata Registry”
    • Managing Vocabularies
    • Providing Vocabulary Services
  • RDA – Now adding translations
  • IFLA Work
    • FRBR, FRAD, FRSAD, ISBD

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

slide31
Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

slide32
Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

slide33
Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

slide34
Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

rda as realization of frbr
RDA as realization of FRBR
  • What will this look like?
  • Probably *won’t* be stored in MARC
  • Overly constrained by FRBR?
    • Properties have FRBR domains & ranges
    • Unofficial “Generalized” properties
  • Non-FRBR metadata
  • Similar to DCMI’s range constraints…

Harper - Linked Library Data - RDA Webinar Series

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support free range metadata
Support Free Range Metadata!

Photo Credit: http://www.flickr.com/photos/ciwf/3217378769/

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

bibo and rdavocab
BIBO and RDAVocab
  • Open question re: alignment
  • Simplified view of Bib Data is useful
    • Interlinking with more general data
    • Interlinking with non-library domain data
  • FRBR as internal model for library domain
  • Examples

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

why does this matter
Why Does This Matter?

Our descriptions no longer stand alone!

Connect our data with the rest of the WEB

Allow others to reuse more easily

  • FOAF, Geonames
  • DBPedia
  • MusicBrains
  • New York Times, Thomson Reuters
  • Government Data - data.gov
  • British Broadcasting Corporation
  • Other Library, Archive and Museum Data

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

conclusions
Conclusions
  • Distributed bibliographic control environment
    • Linking Data
    • Focus on identification over description
  • “In short, by treating values as non-literal resources and assigning URIs to them we give ourselves (and others) the hooks on which to hang further descriptions.” - Andy Powell

Harper - Linked Library Data - RDA Webinar Series

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future work
“Records” in Linked Library Data

Vocabulary Alignment and Interoperability

DCMI planning in this space

General Metadata Interoperability

Application Profiles?

Archival Data for *context* - (EAC-CPF)

Future Work

Harper - Linked Library Data - RDA Webinar Series

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w3c linked library data incubator
W3C Linked Library Data Incubator
  • Collecting, Curating and Clustering over 50 Use Cases
  • Mining use cases for functional requirements and design patterns
  • Recommendations to W3C
    • Should lead to Working Groups
  • http://www.w3.org/2005/Incubator/lld/

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services

other activities
Other Activities
  • ALCTS/LITA Linked Library Data IG
  • IFLA Semantic Web IG
    • https://wiki.d-nb.de/x/vA10Ag
  • Open Knowledge Foundation
    • http://okfn.org/
  • CKAN Linked Library Data Group:
    • http://ckan.net/group/lld

Harper - Linked Library Data - RDA Webinar Series

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thanks
Thanks!

corey.harper@nyu.edu

212.998.2479

@chrpr

Questions?

Harper - Linked Library Data - RDA Webinar Series

Hosted by the Association for Library Collections and Technical Services