Linked Data in Archives

Presented 2012-08-23

SAA 2012, Linking Data Across Libraries, Archives, and Museums

Corey A Harper

Publish, Enrich, Refine, Reconcile, Relate

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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

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Semantic Web

• Originally:

Metadata standard built on XML

Metadata about “Web” things (documents)

• Eventually:

Metadata about all sorts of things

And about relationships between things

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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

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Linked Data

• Metadata as a Graph

• Typed “things”, named by URIs

• The relationships between those

things, also built on URIs

• Ease of integration *across* data

sources – “merging graphs”

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Growth of the Linked Data cloud

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DBpedia

• Structured Wikipedia Data

• Genres, Influences, External Links

• Multi-lingual / Multi-script labels

• Rich Semantics

• Many linkages to other datasets

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DBpedia Model

• Partial basis in data entry conventions

• InfoBoxes, and InfoBox Templates

• Metadata Entry Format

• Partial source of Ontology

Class Structure

Vocabulary Design

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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

http://thinkbase.cs.auckland.ac.nz/start.jsp

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Google Knowledge Graph

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Google Refine

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Automated Authorities?

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Belgians! http

://free

yo

urm

eta

da

ta.o

rg/

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BBC Chimps

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BBC Wildlife

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BBC Programmes

http://datagov.clarkparsia.com/

http://weblog.clarkparsia.com/2010/05/26/another-reason-semantic-web-kicks-ass/

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RelFinder

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LinkSailor: http://linksailor.com/nav

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LAWDI http

://openconte

xt.o

rg/

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LAWDI

• Linked Ancient World Metadata Institute

Archeologists, Numismatists, Classists

Quasi- Digital Humanities

• Doing their own Linked Data

• Excited about Libraries helping

VIAF, id.loc, FAST, OCLC #’s etc…

• Actively modeling ancient place names

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W3C Linked Library Data Incubator

• Collected, Curated and Clustered over

50 Use Cases

• Mined use cases for functional

requirements and design patterns

• Recommendations to W3C

• http://www.w3.org/2005/Incubator/lld/

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Use Case Categories

• Bibliographic Data

• Authority Data

• Archives & Heterogeneous Metadata

• Citations

• Digital Objects

• Collections

• Social & New Uses

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So What Can You Do?

• Iterative changes to metadata

• Adding identifiers where you can

Unit Titles, Component Levels

• Access points at series, subseries, folder

• Relationships rather than (or in addition

to) prose

• RDFa embedded in HTML Finding Aids

• Start playing with tools and techniques

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Daily Worker

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Refine

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ViewShare

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LC Bibliographic Framework Transition http

://ww

w.lo

c.g

ov/m

arc

/transitio

n/

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• Distributed information ecosystem

Linking Data

Focus on identification over description

• Create navigable, browsable information

landscapes

• Relationships between resources weave

context & enrich user experiences

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Next Steps & Works in Progress

• Provenance

• Licensing

• Best Practices, Modeling & Infrastructure

• DCMI & W3C Work! (Add links on new slide)

DC Abstract Model / Application Profiles /

Description Sets

Vocabulary Management

Schema.org mappings

Provenance Ontology

• Interface Design

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New Interfaces

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Not Just for Libraries, Archives, Museums!

• Providing models & resources for

scholars and researchers

• Digital Humanities (LAWDI)

• Adding authoritative, stable URIs to the

grid that others can link to

• Pouring our history of info mgt into tools

like Freebase

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Thanks!

corey.harper@nyu.edu

212.998.2479

@chrpr