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April 18, 2023Sergey Chernov
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Extracting Semantic Relationships between Wikipedia Categories
By Sergey Chernov, Tereza Iofciu, Wolfgang Nejdl, Xuan Zhou, Michal Kopycki, Przemyslaw Rys
April 18, 2023Sergey Chernov
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Preliminaries
WIKIPEDIA: largest knowledge sharing system
Many pages assigned to CATEGORIES
All links are NAVIGATIONAL
Can we extract SEMANTIC links?
MOTIVATION
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Wikipedia Categories ExampleMOTIVATION
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Possible benefits
Semi-structured queries“find Countries which had Democratic Non-Violent Revolutions”
rephrased as
“find page from category Countries which is connected to some page in Non-Violent Revolutions”
Hints for authors
“you edit page from category Countries, do you want to add a link to page in category Capital?”
Raw data for manual semantic markup
MOTIVATION
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Countries
HeuristicsExperiments
Denmark
Austria
CapitalsBerlin
Stockholm
Vienna
Germany
France Paris
Number of links
NL = 3
Connectivity Ratio
CR = 3/4 = 0.75
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Dataset
INEX 2006 collection
Sample category rankings
Experiments
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Manual assessment methodology
Semantic Connection Strength (SCS) Measure: 2 = strong semantic relationship, 1 = average semantic relationship, 0 = weak or no semantic relationship.
Instruction for Assessors
“category A is strongly related to category B (value 2) if you believe that every page in A should conceptually have at least one semantic link to B;”
“A and B are averagely related (value 1), if you believe 50% of pages in A should have semantic links to B;”
“otherwise, A and B are weakly related (value 0).”
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Experiments with Number of Links
Average semantic connections strength for 100 sample categories, extracted using Number of Links.
Experiments
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Experiments with Connectivity Ratio
Average semantic connections strength for 100 sample categories, extracted using Connectivity Ratio.
Experiments
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General Results and Conclusions
Result is skewed toward Countries category
Connectivity Ratio is a better measure than Number of Links
We have observed that inlinks have better performance than outlinks.
Summary
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Future Steps
More manual exploration, look for additional heuristics
Consider more categories
SCS composed of
Is this a “part of” relation? W1 Is this a “is a” relation? W2 Is this a “synonym” relation? W3 Is this a “antonym” relation? W4 It is related in a different way? Which one? W5
Summary
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Thank You!