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DBpedia Viewer
An Integrative Interface for DBpedia
Leveraging the DBpedia Service Eco
System
#LDOW14 #WWW2014
#GSoC2013
Lukovnikov D., Kontokostas D., Stadler C., Hellmann S., Lehmann J.
Linked Data
● Perfect for machines
● Not so good for humans
○ Fine granularity (RDF triples)
○ Need to ingest triples
○ What is behind a resource URI?
● Imagine landing on a Pubby page
Linked Data @ DBpedia
● DBpedia extracts knowledge from Wikipedia
and publishes it as RDF
● 191 languages in v3.9 (08/13), 15 language
chapters & ~4M entities in English
● Various access points
○ RDF dumps, SPARQL endpoint & Linked Data
● Pubby-Like LD interface as a Virtuoso plugin
DBpedia Services - Spotlight
DBpedia Services - Lookup
LD Tools - RelFinder
DBpedia tools - Mappings wiki
LD Tools - LODLive
LD Tools - Virtuoso fct pluin
DBpedia Viewer
● Intuitive & interactive
● Integrative (tools)
○ Triple Action Framework
● Client-based rendering
○ No-JS support (defaults to old interface)
● Reduces information overload on previous
DBpedia UI
DBpedia Viewer - Technology
● Data: Virtuoso Triplestore
○ Exposes SPARQL endpoint
● Server: VSP
○ Client bootstrapping
○ Non-Javascript visitors (old UI)
● Client: AngularJS
○ Dynamic UI
○ Direct use of SPARQL endpoint (from JS)
DBpedia Viewer - Features
1. Pretty box: short entity summary
2. Search bar: search entities (lookup)
3. Language filtering: primary & fallback
4. Triple filtering : just helpful
5. Shortcuts: just helpful too
6. Previews: preview other resource
7. Maps: shows entity on map
8. Triple Actions: actions bound to triples
DBpediaViewer-Features
Triple Actions
● Defined by UI maintainer
⇒ easy means to extend UI
○ boilerplate already implemented
● Initially for:
○ user actions → interaction
● Proved useful for:
○ system actions → customization
Triple Actions - Main Semantics
● Bind: whether action applicable
○ based on values in triple and action state
● Execute: what to do when invoked
○ go to URL
○ query external resource / service
● State:
○ global: across all action instances
○ local: at one action instance only
Triple Actions - Extras
Additional hooks and features:
● Icon display:
○ may depend on state
● Title (ID) & description
● Legend entry
DBpedia Viewer - User Actions
● Text Annotation: Spotlight on long texts
● RelFinder: relationship finder tool
● LodLive & Virtuoso fct: alternative browsers
● Wikipedia: view source page
● Mappings Wiki: view mappings wiki page
⇒ may use any of the (subject, predicate, object) from a
triple
DBpedia Viewer - System actions
● Invisible to users
● Populate UI elements based on data
○ owl:sameAs → filter → pretty box
○ geocoordinates → show in map
● Implement data-triggered functionality
○ :wikiPageRedirects ⇒ redirect page
Conclusion
● Interactive additions and layout choices may
improve comprehensibility of data
○ While keeping the Linked Data philosophy
● JS with SPARQL via AJAX
○ Page construction in client → less server-side load
● Triple Actions
○ Easy customization (system actions)
○ More interaction (user actions)
Possible future
● Generalization for all datasets (LD Viewer)
● New actions
○ Push triple to Wikidata
○ Triple validation
● User behavior analysis for
○ Entity summarization
○ Entity ranking
ASK
{ :Audience :hasQuestion ?q }
Sponsored by GSoC 2013https://github.com/dbpedia/dbpedia-vad-i18n

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DBpedia Viewer - LDOW 2014

  • 1. DBpedia Viewer An Integrative Interface for DBpedia Leveraging the DBpedia Service Eco System #LDOW14 #WWW2014 #GSoC2013 Lukovnikov D., Kontokostas D., Stadler C., Hellmann S., Lehmann J.
  • 2. Linked Data ● Perfect for machines ● Not so good for humans ○ Fine granularity (RDF triples) ○ Need to ingest triples ○ What is behind a resource URI? ● Imagine landing on a Pubby page
  • 3. Linked Data @ DBpedia ● DBpedia extracts knowledge from Wikipedia and publishes it as RDF ● 191 languages in v3.9 (08/13), 15 language chapters & ~4M entities in English ● Various access points ○ RDF dumps, SPARQL endpoint & Linked Data ● Pubby-Like LD interface as a Virtuoso plugin
  • 4.
  • 5. DBpedia Services - Spotlight
  • 7. LD Tools - RelFinder
  • 8. DBpedia tools - Mappings wiki
  • 9. LD Tools - LODLive
  • 10. LD Tools - Virtuoso fct pluin
  • 11. DBpedia Viewer ● Intuitive & interactive ● Integrative (tools) ○ Triple Action Framework ● Client-based rendering ○ No-JS support (defaults to old interface) ● Reduces information overload on previous DBpedia UI
  • 12. DBpedia Viewer - Technology ● Data: Virtuoso Triplestore ○ Exposes SPARQL endpoint ● Server: VSP ○ Client bootstrapping ○ Non-Javascript visitors (old UI) ● Client: AngularJS ○ Dynamic UI ○ Direct use of SPARQL endpoint (from JS)
  • 13. DBpedia Viewer - Features 1. Pretty box: short entity summary 2. Search bar: search entities (lookup) 3. Language filtering: primary & fallback 4. Triple filtering : just helpful 5. Shortcuts: just helpful too 6. Previews: preview other resource 7. Maps: shows entity on map 8. Triple Actions: actions bound to triples
  • 15. Triple Actions ● Defined by UI maintainer ⇒ easy means to extend UI ○ boilerplate already implemented ● Initially for: ○ user actions → interaction ● Proved useful for: ○ system actions → customization
  • 16. Triple Actions - Main Semantics ● Bind: whether action applicable ○ based on values in triple and action state ● Execute: what to do when invoked ○ go to URL ○ query external resource / service ● State: ○ global: across all action instances ○ local: at one action instance only
  • 17. Triple Actions - Extras Additional hooks and features: ● Icon display: ○ may depend on state ● Title (ID) & description ● Legend entry
  • 18. DBpedia Viewer - User Actions ● Text Annotation: Spotlight on long texts ● RelFinder: relationship finder tool ● LodLive & Virtuoso fct: alternative browsers ● Wikipedia: view source page ● Mappings Wiki: view mappings wiki page ⇒ may use any of the (subject, predicate, object) from a triple
  • 19. DBpedia Viewer - System actions ● Invisible to users ● Populate UI elements based on data ○ owl:sameAs → filter → pretty box ○ geocoordinates → show in map ● Implement data-triggered functionality ○ :wikiPageRedirects ⇒ redirect page
  • 20. Conclusion ● Interactive additions and layout choices may improve comprehensibility of data ○ While keeping the Linked Data philosophy ● JS with SPARQL via AJAX ○ Page construction in client → less server-side load ● Triple Actions ○ Easy customization (system actions) ○ More interaction (user actions)
  • 21. Possible future ● Generalization for all datasets (LD Viewer) ● New actions ○ Push triple to Wikidata ○ Triple validation ● User behavior analysis for ○ Entity summarization ○ Entity ranking
  • 22. ASK { :Audience :hasQuestion ?q } Sponsored by GSoC 2013https://github.com/dbpedia/dbpedia-vad-i18n