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Presentation of the paper "Exploiting user gratification for collaborative semantic annotation" at SWUI08
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Davide Eynard Marco Colombetti
[email protected] [email protected]
Exploiting User Gratification for Collaborative Semantic Annotation
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Davide Eynard – Marco ColombettiDEI
Intro Annotation systems Our approach
• the basic idea• design and implementation• tests and evaluations
Conclusions and future work
Talk Outline
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Davide Eynard – Marco ColombettiDEI
Intro
Challenge: adding semantics to the “Legacy Web”
We adopt a collaborative approach:
Users, thanks to participation, create huge quantities of data. Our aim is to exploit spontaneous collaboration to increase the amount of formal knowledge.
Semantic Web technologies provide formalisms and tools for knowledge representation and management.Our aim is to use them to create more powerful andrewarding collaborative systems.
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Davide Eynard – Marco ColombettiDEI
Annotation systems
Currently they seem the way to go, allowing for a real “Read-Write Web” “Client-Server-Server” model
Main problems: they currently lack a wide participation! gratification is both a high reward and a low price
• make system easy and intuitive to use• give something back after each contribution
gratification is not only the one you have just received, but also the one you expect
• system cannot begin as empty: how to bootstrap?
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Davide Eynard – Marco ColombettiDEI
Our approach
The bootstrap problem:
“People will not come to a bare site and just start editing blank pages. You have to nurture that community slowly by building a base of readers, and then gradually turning those readers into contributors. The ONLY way to build that reader base is with good content, and because the readers come before contributors, you have to do the contributions yourself.” (David Cohn)
Ontologies are good, but not the best solution see: KIM
Alternative idea: provide no contents, but a way to get them easily each concept triggers a collection of specific search engines see: Gnosis
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Davide Eynard – Marco ColombettiDEI
System design
Motivate users gratification (expected, instant, long term) ease of use
• extension of an existing tool (the browser)• already existing affordances• concept suggestion• few clicks to complete
Make their contributions useful to everyone share annotations with other users
• social network/trust system what kind of related information?
• give a chance to customize results• even these customizations become part of the final value!
make data available as RDF
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Davide Eynard – Marco ColombettiDEI
System architecture
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Davide Eynard – Marco ColombettiDEI
Example
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Davide Eynard – Marco ColombettiDEI
Some results
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Davide Eynard – Marco ColombettiDEI
Evaluation
Users still no community adopting the annotation prototype a small, but expert one around the search tool
Data SPARQL endpoint available advantage: string disambiguation
How much new info? SA vs. Gnosis more sensible to typos no industry terms
(only named entities) larger taxonomy
(book titles, actors, football teams!)
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Davide Eynard – Marco ColombettiDEI
Conclusions
Limits of our approach still a prototype still vulnerable to gaming
Novel contributions additional information is harvested from the Internet
• one possible solution for the bootstrap problem? users can fully customize results (they “choose their rewards”)
Future work/possible extensions release the tool and complete evaluation automatically show related info (such as ISBNs for books) allow more customizations on search templates
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Davide Eynard – Marco ColombettiDEI
Conclusions
Add your questions here ;-)