S EARCH AND S EMANTIC S EARCH Indian Institute of Technology Kanpur - - PowerPoint PPT Presentation

s earch and s emantic s earch
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S EARCH AND S EMANTIC S EARCH Indian Institute of Technology Kanpur - - PowerPoint PPT Presentation

S EARCH AND S EMANTIC S EARCH Indian Institute of Technology Kanpur Commonwealth of Learning Vancouver MOOC on M4D 2013 T.V. Prabhakar IIT Kanpur MOOC on M4D 2013 Search Engines Do not search the web in real time Searche an index of


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MOOC on M4D 2013

SEARCH AND SEMANTIC SEARCH

Indian Institute of Technology Kanpur Commonwealth of Learning Vancouver

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MOOC on M4D 2013

T.V. Prabhakar IIT Kanpur

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Search Engines

  • Do not search the web in real time
  • Searche an index of the web
  • Created by crawling with spiders
  • Searches the documents for the occurrence
  • f the “search string” - substring search
  • After retrieving the documents does ranking
  • Ranking is critical and complex

– Google uses 200+ factors for ranking

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Google Webmasters Tools

  • How search works

https://youtu.be/BNHR6IQJGZs

  • More detailed

https://youtu.be/KyCYyoGusqs

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But

Holstein Jersey

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How do we do this?

  • The system needs to know that Holstein is a

breed of cow and Jersey is another breed

Cow Breeds

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Pigeonpea domain model

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We call these

  • Knowledge Models
  • Useful in

– Semantic Search – Related Documents – Inference – Teaching – ..

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MOOC on M4D 2013

THANK YOU