Exploring Linked Data
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Roberto García presented on exploring linked data. He discussed how semantic data is fine for computers but difficult for people to interact with. He proposed automatically generating user interfaces from ontologies and datasets, including overview menus, faceted browsing, and interaction patterns to allow users to build queries without knowledge of SPARQL or dataset structure. He demonstrated examples of his approach applied to DBPedia and LinkedMDB data.
![Proposal
Ontologies and dataset structure
Automatic UI Generation Information
Architecture
Components
[Morville]
Overview Menus, Sitemaps,…
Interaction
Patterns for Zoom & Filter Facets
Data Analysis
[Shneiderman]
Details Lists, Maps, Timelines…](https://image.slidesharecdn.com/rhizomer-loticomeetup-120815123202-phpapp02/85/Exploring-Linked-Data-5-320.jpg)
Exploring Linked Data
- 1. Exploring Linked Data Roberto García Lotico Semantic Web Meetup San Francisco, August 8th 2012 Human-Computer Interaction Universitat de Lleida and Data Integration Spain Research Group
- 2. 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
- 3. Tons of semantic data… http://linkeddata.org
- 4. Fine for computers… but people? M. Harper (developer) I’m developing a bird watching application. Can I reuse DBPedia? http://linkeddata.org
- 5. Proposal Ontologies and dataset structure Automatic UI Generation Information Architecture Components [Morville] Overview Menus, Sitemaps,… Interaction Patterns for Zoom & Filter Facets Data Analysis [Shneiderman] Details Lists, Maps, Timelines…
- 6. IA Components. Menus 7 menus with 10 submenus Automatic Generation
- 7. DEMO http://rhizomik.net/dbpedia/ IA Components. Menus DBPedia overview… …but what about 12.334 birds?
- 8. 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
- 16. DEMO http://rhizomik.net/linkedmdb/ 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") }
- 17. Example: OMediaDis project • Explore dataset about works, recordings, licenses,… • Integrate visualisation plugins – Timeline, map, license viewer,…
- 18. Thanks for your attention Roberto García http://rhizomik.net/~roberto roberto.garcia@udl.cat Human-Computer Interaction and Data Integration Universitat de Lleida Research Group
Editor's Notes
- #10: Faceted view for Species > Bird Looking for pigeons (Columbidae) in “Mediterranean Countries”… Filter on direct properties like Familia = Columbidae
- #11: No “Mediterranean Countries” in Geo facet…
- #12: Use the pivot operation to filter Populated Places connected through the Geo facet…
- #13: Faceted view for Populated Place, previous filters are kept
- #14: Scroll down to the Subject facet, select “Countries of the Mediterranean Sea”
- #15: The Countries in the Mediterranean Sea that have Birds in the Columbidae family, pivot back to Bird to get the list of Birds
- #16: Showing the Birds in DBPedia part of the Columbidae family and located in Populated Places related with the “Countries of the Mediterranean Sea” topic