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One Tag to bind them all: Measuring Term abstractness in Social Metadata

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Inovex GmbH
Inovex GmbH

Talk at ESWC 2011, Heraklion, Crete

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One Tag to Bind Them All: Measuring Term Abstractness in Social Metadata Dominik Benz 1 , Christian Körner 2 , Andreas Hotho 3 , Markus Strohmaier 2 , Gerd Stumme 1 2 Knowledge Management Institute and Know Center, Graz University of Technology, Austria 1 Knowledge and Data Engineering Group (KDE), University of Kassel, Germany 3 Data Mining and Information Retrieval Group University of Würzburg, Germany TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A A A A A A
A cat? Felis silvestris cretensis? An animal? ,[object Object],[object Object], Can term abstractness be inferred from social metadata?
The Story Social Metadata Term Abstractness Abstractness measures based on social annotations Evaluation
Terms in Social Metadata ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Socially induced term relations ,[object Object],Alice Bob eswc.org kreta.gr semantics conference travel term graphs 2 3 1 3 5 1 1 2
[object Object],[object Object],[object Object],Semantic Tag Graphs with Cattuto et al: Semantic Grounding of Tag Relatedness in Social Bookmarking Systems (ISWC 2008) 0 50 10 1 30 5 … iswc.org eswc.org google.de cnn.com w3c.net kreta.gr … ONTOLOGY 0.1 0.3 0.01 0.5 0.17 0.2 0.04 0.3
The Story Social Metadata induces term relations (COOC and SIM) Term Abstractness Abstractness measures based on social annotations Evaluation
Definition of Term Abstractness Cat? Felis Silvestris? ,[object Object],[object Object],[object Object],creature 0.9 animal 0.8 cat 0.6 mouse 0.6 felis_s 0.4 felis_s_c 0.2 petromysc 0.2 …
The Story Social Metadata induces term relations (COOC and SIM) Formal definition of term abstractness measure Abstractness measures based on social annotations Evaluation
Folksonomy-based generality ranking ,[object Object],[object Object],ANIMAL FELIS SILVESTRIS
Folksonomy-based generality ranking (2) ,[object Object],[object Object],[object Object],[object Object],[object Object]
Folksonomy-based generality ranking (3) ,[object Object],[object Object],P1: animal cat P2: animal dog P3: animal cat P4: animal mouse P5: animal mouse P6: animal cat P7: animal bird P8: animal dog p(animal|cat) = 3/3 = 1 p(cat|animal) = 3/8 = 0.375
The Story Social Metadata induces term relations (COOC and SIM) Formal definition of term abstractness measure Frequency, Entropy, Centrality and Statstical subsumption are folksonomy-based generality rankings Evaluation
Which generality ranking is best? ,[object Object],[object Object],767,018 767,019 DMOZ 4,447,010 2,445,974 Wikitaxonomy 249,465 244,553 Yago 81,866 79,690 Wordnet # is-a relations # concepts
Social Metadata used ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Results gamma correlatoin DMOZ Wordnet Yago Wikitaxonomy
Discussion & Implications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The Story Social Metadata induces term relations (COOC and SIM) Formal definition of term abstractness measure Frequency, Entropy, Centrality and Statstical subsumption are folksonomy-based generality rankings Simple folksonomy-based measures approximate well term generality Thanks! [email_address]

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One Tag to bind them all: Measuring Term abstractness in Social Metadata

  • 1. One Tag to Bind Them All: Measuring Term Abstractness in Social Metadata Dominik Benz 1 , Christian Körner 2 , Andreas Hotho 3 , Markus Strohmaier 2 , Gerd Stumme 1 2 Knowledge Management Institute and Know Center, Graz University of Technology, Austria 1 Knowledge and Data Engineering Group (KDE), University of Kassel, Germany 3 Data Mining and Information Retrieval Group University of Würzburg, Germany TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A A A A A A
  • 2.
  • 3. The Story Social Metadata Term Abstractness Abstractness measures based on social annotations Evaluation
  • 4.
  • 5.
  • 6.
  • 7. The Story Social Metadata induces term relations (COOC and SIM) Term Abstractness Abstractness measures based on social annotations Evaluation
  • 8.
  • 9. The Story Social Metadata induces term relations (COOC and SIM) Formal definition of term abstractness measure Abstractness measures based on social annotations Evaluation
  • 10.
  • 11.
  • 12.
  • 13. The Story Social Metadata induces term relations (COOC and SIM) Formal definition of term abstractness measure Frequency, Entropy, Centrality and Statstical subsumption are folksonomy-based generality rankings Evaluation
  • 14.
  • 15.
  • 16. Results gamma correlatoin DMOZ Wordnet Yago Wikitaxonomy
  • 17.
  • 18. The Story Social Metadata induces term relations (COOC and SIM) Formal definition of term abstractness measure Frequency, Entropy, Centrality and Statstical subsumption are folksonomy-based generality rankings Simple folksonomy-based measures approximate well term generality Thanks! [email_address]