The document describes a demonstration of dbrec, a self-explanatory music recommendation system that uses Linked Data and the Linked Data Semantic Distance (LDSD) to provide recommendations for over 39,000 musical artists and bands from DBpedia. It computes recommendations by calculating the LDSD between artists modeled in an LDSD ontology and displays results through a SPARQL query-based user interface using RDFa.

1. Hey! Ho! Let’s go!
Explanatory music
recommendations with dbrec
Alexandre Passant, Stefan Decker - DERI, NUI Galway
Demo Session @ ESWC2010
1st June 2010 @ Heraklion, Crete
Tuesday 1 June 2010

2. If you like X ...
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3. Semantic Distance
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4. Does it help ?
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5. Linked Data
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6. Linked Data
e:l1
e:r1 e:l1 e:r2
e:l2
e:l2 e:l3 e:l3
e:r3 e:r4
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7. G = (R, L, I)
e:l1
e:r1 e:l1 e:r2
• R = {r , r , ..., r }
1 2 n
e:l2
• L = {l , l , ..., l }
1 2 n e:l2 e:l3 e:l3
• I = {i , i , ..., i }
1 2 n
e:r3 e:r4
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8. Linked Data Semantic
Distance (LDSD)
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9. e:l1 e:l1
e:r1 e:l1 e:r2 e:r1 e:l1 e:r2
e:l2 e:l2
e:l2 e:l3 e:l3 e:l2 e:l3 e:l3
e:r3 e:r4 e:r3 e:r4
e:l1 e:l1
e:r1 e:l1 e:r2 e:r1 e:l1 e:r2
e:l2 e:l2
e:l2 e:l3 e:l3 e:l2 e:l3 e:l3
e:r3 e:r4 e:r3 e:r4
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10. Weighting the links
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11. e:l1
e:r1 e:l1 e:r2
e:l2
e:l2 e:l3 e:l3
e:r3 e:r4
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12. LDSD(ra, rb)
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13. http://dbrec.net
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14. dbrec
• A self-explanatory recommendation system
and mash-up for all artists and bands from
DBpedia (39.000+ resources,
dbp:MusicalArtist + dbp:Band),
modelling the results using the LDSD
ontology and RDFa to enable data reuse
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15. Tuesday 1 June 2010

16. Ontology
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17. Architecture
(2) Dataset reducing
(1) Dataset (3) LDSD (4) User
identification computation interface
RDF Data RDF Data
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18. SW technologies
• Source data is RDF data from DBpedia
• LDSD is computed with SPARQL
• Results are modelled using the LDSD
ontology
• User interface is built with SPARQL and
embeds RDFa
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19. Demo
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20. Tuesday 1 June 2010

21. Contact:
alexandre.passant@deri.org - http://apassant.net - @terraces
Acknowledgements:
Science Foundation Ireland - SFI/08/CE/I1380 (Lion 2)
References:
AIII Spring Symposium 2010 - LinkedAI Symposium
ESWC2010 - Demo Session
Tuesday 1 June 2010

22. Pictures credits
• http://flickr.com/photos/iskanderstruck/248786430/ by iskanderbenamor
• http://www.flickr.com/photos/loungerie/2196866243/ by loungerie
• http://richard.cyganiak.de/2007/10/lod/ by Richard Cyganiak + Anja Jentzsch
• http://flickr.com/photos/kieranmcglone/2369518260/ by kieranmcglone
• http://www.flickr.com/photos/fensterbme/136098539/ by fensterbme
• http://www.flickr.com/photos/homer4k/461407380/ by homer4k
• http://www.flickr.com/photos/yumlog2/20896759/ by yuki*
• http://flickr.com/photos/8049973@N03/2656140464/ by wolf.tone
Tuesday 1 June 2010