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Copyright 2013 New York University. This work is licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/deed.en_US Funding for the preparation and presentation of this presentation and the workshop at which it was presented was provided by the National Endowment for the Humanities. Any views, findings, conclusions, or recommendations expressed in this presentation do not necessarily reflect those of the National Endowment for the Humanities. Linked Data at ISAW: How and Why Tom Elliott Associate Director for Digital Programs and Senior Research Scholar http://www.paregorios.org

Linked Data at ISAW: How and Why

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Presentation delivered at the Linked Ancient World Data Institute, Drew University, 30 May 2013. Copyright 2013 New York University. This work is licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/deed.en_US Funding for the preparation and presentation of this presentation and the workshop at which it was presented was provided by the National Endowment for the Humanities. Any views, findings, conclusions, or recommendations expressed in this presentation do not necessarily reflect those of the National Endowment for the Humanities.

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Page 1: Linked Data at ISAW: How and Why

Copyright 2013 New York University.This work is licensed under a Creative Commons Attribution 4.0 International License.http://creativecommons.org/licenses/by/4.0/deed.en_US

Funding for the preparation and presentation of this presentation and the workshop at which it was presented was provided by the National Endowment for the Humanities. Any views, findings, conclusions, or recommendations expressed in this presentation do not necessarily reflect those of the National Endowment for the Humanities.

Linked Data at ISAW: How and Why

Tom ElliottAssociate Director for Digital Programs and Senior Research Scholar

http://www.paregorios.org

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Theodor MommsenPhoto of unknown date, but prior to Mommsen’s death in 1903. Public domain. Source: http://en.wikipedia.org/wiki/File:T-mommsen-2.jpg

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Why linked data for ISAW?

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• There is a person named “Daniel T. Potts”.– There is a person. That person is named “Daniel T. Potts”.

Describing an ISAW faculty member

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• RDF = Resource Description Frameworkhttp://www.w3.org/RDF/

“a general-purpose language for representing information in the Web”

• triple: the most basic RDF expression, consisting of a subject, predicate (verb), and object (property). Each triple represents a statement of a relationship between the things denoted by the nodes that it links. A triple can be represented as a node-arc-node link diagram.”

• A set of triples is called an RDF graph, a term derived from mathematics and computer science denoting a set of objects (or data structures) in which pairs of objects are connected by links.

Terms: “RDF Triples”

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• Turtle = Terse RDF Triple Languagehttp://www.w3.org/TR/turtle/

“a textual syntax for RDF called Turtle that allows RDF graphs to be completely written in a compact and natural text form, with abbreviations for common usage patterns and datatypes.”

The media type of Turtle is text/turtle. The content encoding of Turtle content is always UTF-8.

• subject predicate object .

Writing RDF Triples in Turtle

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There is a person. That person is named “Daniel T. Potts”.

There is a person.• subject predicate object .• subject:[X] verb:[is] predicate:[a person] .

What we need:– Subject, Predicate (verb), Object (property)– Uniform Resource Identifiers corresponding to each– Key question: mint or reuse

Describing an ISAW faculty member in Turtle

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• Modern authors (i.e., many scholars, like George):– Virtual International Authority File (VIAF)

http://viaf.org/

• Basic characteristics and activities of persons, and relationships between them and things on the web:– FOAF Vocabulary (“Friend of a Friend”)

http://xmlns.com/foaf/spec/

Finding URIs to re-use

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There is a person. That person is named “Daniel T. Potts”.

There is a person.• subject predicate object .• subject:[X] verb:[is] predicate:[a person] .

<http://viaf.org/viaf/17238976> a <http://xmlns.com/foaf/spec/#term_Person> .

Describing an ISAW faculty member in Turtle

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There is a person. That person is named “Daniel T. Potts”.

There is a person.• subject predicate object .• subject:[X] verb:[is] predicate:[a person] .

<http://viaf.org/viaf/17238976> a <http://xmlns.com/foaf/spec/#term_Person> .

--------------------@prefix viaf: <http://viaf.org/viaf/> .@prefix foaf: <http://xmlns.com/foaf/spec/#term_> .

viaf:17238976 a foaf:Person .

Describing an ISAW faculty member in Turtle

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There is a person. That person is named “Daniel T. Potts”.

@prefix viaf: <http://viaf.org/viaf/> .@prefix foaf: <http://xmlns.com/foaf/spec/#term_> .

viaf:17238976 a foaf:Person .viaf:17238976 foaf:name "Daniel T. Potts" .

--------------------viaf:17238976 a foaf:Person ;

foaf:name "Daniel T. Potts" .

Describing an ISAW faculty member in Turtle

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@prefix viaf: <http://viaf.org/viaf/> .@prefix foaf: <http://xmlns.com/foaf/spec/#term_> .@prefix dc: <http://purl.org/dc/terms/> .

viaf:17238976 a foaf:Person ;foaf:name "Daniel T. Potts" .

<http://pleiades.stoa.org/places/39303> dc:creator viaf:17238976 .

Linking an ISAW faculty member to a digital publication

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@prefix viaf: <http://viaf.org/viaf/> .@prefix foaf: <http://xmlns.com/foaf/spec/#term_> .@prefix dc: <http://purl.org/dc/terms/> .@prefix p: <http://pleiades.stoa.org/places/> .@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .

viaf:17238976 a foaf:Person ;foaf:name "Daniel T. Potts" .

<http://pleiades.stoa.org/places/39303> dc:creator viaf:17238976 ;

rdfs:label "Aksum","Auksome" ;

rdfs:comment "Present-day Aksum in Ethiopia. The center of the Aksumite Kingdom, a maritime trading power that flourished from the first to the tenth centuries AD. The city was listed as UNESCO World Heritage Site in 1980." .

Linking an ISAW faculty member to a digital publication

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@prefix foaf: <http://xmlns.com/foaf/spec/#term_> .

<http://www.paregorios.org/me> a foaf:Person ;foaf:name "Tom Elliott" ;foaf:primaryTopicOf

<http://isaw.nyu.edu/people/staff/tom-elliott> ,<http://www.linkedin.com/in/paregorios> , <http://nyu.academia.edu/TomElliott> ,<https://plus.google.com/116427745746305527780/posts>

,<https://twitter.com/paregorios> , <http://www.paregorios.org/> .

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@prefix awib: <http://isaw.nyu.edu/awib/> .@prefix dctypes: <http://purl.org/dc/dcmitype/> .@prefix flickr: <http://www.flickr.com/> .@prefix foaf: <http://xmlns.com/foaf/spec/#term_> .

awib:image/2009060518070638 a dctypes:Image ;dcterms:creator <http://www.paregorios.org/me> ;dcterms:date "1996-06-13" ;foaf:primaryTopicOf flickr:photos/isawnyu/4910372563 .

flickr:photos/isawnyu/4910372563 a dctypes:Text ;dcterms:format "text/html".

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Openness

Photo of façade of the Museum of Early Trades and Crafts, Madison, NJPhotographed by Tom Elliott, 29 May 2013