Lifting the Lid on Linked Data
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Presentation at ELAG 2011, European Library Automation Group Conference, Prague, Czech Republic. 25th May 2011 http://elag2011.techlib.cz/en/815-lifting-the-lid-on-linked-data/
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Lifting the Lid on Linked Data
- 1. Linked Data and the LOCAH project Jane Stevenson & Adrian Stevenson
- 2. Linked Data on the Hub & Copac Linked Open Copac and Archives Hub: Locah JISC funded project August 2010 – July 2011 Mimas UKOLN Eduserv
- 3. The goal of Linked Data is to enable people to share structured data on the Web as easily as they can share documents today. It is a space where people and organizations can post and consume data about anything. Bizer/Cyganiak/Heath Linked Data Tuturial, linkeddata.org
- 8. ProvidesAccessTo Subject: Bibliographic Resource Predicate: AccessProvidedBy Object: Library Subject > Predicate > Object AccessProvidedBy Triple statement Bibliographic Resource Library
- 9. describedBy heldAt encodedAs has An RDF Graph Bibliographic Resource Library Bibliographic Record MODS document Title
- 11. The Linking benefits of Linked Data BBC:Cranford VIAF:Gaskell DBPedia: Gaskell Hub:Gaskell Copac:Cranford Geonames:Manchester DBPedia: Dickens Hub:Dickens
- 15. Copac Model (as at November 2010)
- 17. Cardinality Property URI/literal 1 1 dct:title literal 0 1 dct:extent literal 0 m bibo:isbn literal 0 m bibo:issn literal 0 m bibo:note literal 0 m dct:alternative literal 0 m copac:uniformtitle literal Node name MODS field Ontology BibliographicResource <modscollection> bibo
- 18. Node name MODS field Ontology BibliographicResource <modscollection> bibo cardinality property URI/literal ontology 0 1 copac:creator Creator URI dc 0 m copac:contributor Contributor URI coapc 0 1 event:producedIn Production Date URI event 0 1 dct:issued Production Date URI dc 0 m pode:publicationPlace Place URI pode 0 m isbd:P1016 Place URI isbd 0 m dct:publisher Publisher URI dc 0 1 dct:isPartOf Series URI dc 1 m copac:HeldBy Institution URI with Institution as subject 1 1 bibo:type Type URI bibo 0 m dct:subject Subject URI dc 0 m skos:subject subject URI skos 0 m dct:language Language URI dc 1 1 hub:encodedAs mods URI hub
- 19. cardinality property URI/literal URI 1 1 rdf:type URIs http://purl.org/dc/terms/Agenthttp://xmlns.com/foaf/0.1/Agent 1 1 rdfs:label literal {namePart} 1 1 skos:prefLabel literal {namePart} 1 1 isCreatorOf Bibliographic Resource URI root/id/bibliographicresource/{recordIdentifer} Node name MODS field URI namespace uri pattern Creator <name> <namePart></namePart>where <roleTerm>creator</roleTerm> copac root/id/agent/{BibID}{namePart}
- 20. Aggregated Data
- 25. RDF Process
- 33. Copac RDF DC foaf skos Copac bibo dcterms:title dcterms:identifier Shared use of vocabularies Hub RDF DC foaf skos Hub
- 55. Thank You
- 56. Sections of this presentation adapted from materials created by other members of the LOCAH Project This presentation available under creative commons Non Commercial-Share Alike: http://creativecommons.org/licenses/by-nc/2.0/uk/ Attribution and CC licence
Hinweis der Redaktion
- Has been described as a ‘data commons’, or more usually a Web of Data.
- Persitent URIs for names of things – http URIs are names, not addresses Provide information – properties and classes for a URI More links
- In a data graph, there is no concept of roots (or a hierarchy). A graph consists of resources related to other resources, with no single resource having any particular intrinsic importance over another.
- We have four ‘things’ here: unit of description; repostiory; finding aid; EAD document. We have given Unit of description a number of properties. Other things can also have properties (this is simplified) These properties are indicated in the green boxes. They are also called predicates.
- In hypertext web sites it is considered generally rather bad etiquette not to link to related external material. The value of your own information is very much a function of what it links to, as well as the inherent value of the information within the web page. So it is also in the Semantic Web. Remember, this is about machines linking – machines need identifiers; humans generally know when something is a place or when it is a person. BBC + DBPedia + GeoNames + Archives Hub + Copac + VIAF = the Web as an exploratory space
- Encoded Archival Description is an XML standard for encoding archival finding aids The Object Description Schema (MODS) is an XML -based bibliographic description schema MODS - Metadata Object Description Schema (MODS) is a schema for a bibliographic element set that may be used for a variety of purposes, and particularly for library applications. EAD - Things” include concepts and abstractions as well as material objects We want location – archives physical things so location important Also wanted event data, partly steered by the visualisation prototype Also ‘extent’ data – number of boxes
- 303 and Content Neg from ‘Cool URIs for the Semantic Web’
- Open Data Commons Public Domain Dedication Creative Commons CC0 license
- Once you say that they are the same, the implication is that they share the same classes and properties.