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Exploring Linked Data
Roberto García
Lotico Semantic Web MeetupSan Francisco, August 8th 2012
Human-Computer Interaction and Data IntegrationResearch Group
Universitat de LleidaSpain
Who
• Associate Professor, Universitat de Lleida, Spain• Visiting Associate Professor, Standford University
– Stanford HCI Group
• +12 years Semantic Web research– 1999 MSc Thesis: Knowledge Management using
RDF plus reasoning (SiLRI)– 2006 PhD Thesis: A Semantic Web approach to DRM– 2006- Copyright Ontology– 2007- Lleida HCI Group, Semantic Web User
Interfaces
Tons of semantic data…
http://linkeddata.org
http://linkeddata.org
Fine for computers… but people?
M. Harper (developer)
I’m developing a bird watching application.
Can I reuse DBPedia?
Proposal
Automatic UI Generation Information Architecture Components
[Morville]
Interaction Patterns for Data Analysis
[Shneiderman]
Overview Menus, Sitemaps,…
Zoom & Filter Facets
Details Lists, Maps, Timelines…
Ontologies and dataset structure
IA Components. Menus
AutomaticGeneration
7 menus with 10 submenus
IA Components. MenusDBPedia overview…
…but what about 12.334 birds?
DEMOhttp://rhizomik.net/dbpedia/
IA Components. Facets
• Pre-computed list of facets / class or topic– Ontologies, Thesaurus + instance data– Facets for all inverse properties
(explicit or implicit)• Actor actor – Film:
– Actor has facet “is actor of Film”
– Pivoting: switch from faceted view to related faceted views (keeping filters)
• E.g.: from Birds facets to Places facets through the “geo” facet
DEMOhttp://rhizomik.net/dbpedia/
Conclusions
• Users build queries without SPARQL or dataset structure knowledge
• Example: – Who has directed more films in Oceania?SELECT DISTINCT ?r1 WHERE {
?r1 a movie:Director . ?r2 movie:director ?r1 . ?r2 a movie:Film.?r2 movie:country ?r3 . ?r3 movie:country_continent ?r3var0 FILTER(str(?r3var0)="Oceania") }
DEMOhttp://rhizomik.net/linkedmdb/
Example: OMediaDis project
• Explore dataset about works, recordings, licenses,…• Integrate visualisation plugins
– Timeline, map, license viewer,…
Thanks for your attention
Roberto Garcíahttp://rhizomik.net/~roberto
Human-Computer Interaction and Data IntegrationResearch Group
Universitat de Lleida
