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Search Systems

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Hierarchical search zones [Yahoo SciFi & Movies] Indexing recent content. Chronological in NYT ... Do your users want high recall or high precision? Are their ... – PowerPoint PPT presentation

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Title: Search Systems


1
9/29/2003
  • Search Systems
  • An Alternative to Navigation
  • RM Chapter 8

2
Business
  • Inside Web Development October 2003
  • Questions about the assignment

3
My Favorite Web SitesTheodore L. Parrish
  • www.CBSMarketWatch.com
  • www.CNNMoney.com
  • www.LMTT.com
  • www.dismal.com
  • www.bankrate.com
  • www.bls.gov
  • Finance.yahoo.com does not link
  • www.henssler.com

4
  • Audience specific searching
  • Library of Michigan
  • Indexing by Subject
  • Hierarchical search zones Yahoo SciFi
    Movies
  • Indexing recent content
  • Chronological in NYT
  • assumes you know or are willing to cast a wide
    net

5
Selecting Content Components to Search
  • The home page of Salon.com doesnt do much for
    me
  • Any of you use it?

6
Search Algorithms
  • Pattern Matching
  • recall and precision
  • recall relevant recd./ docs
  • precision relevant recd./ relevant docs
  • Do your users want high recall or high precision?
    Are their wants static or dynamic?

7
Document Similarity
  • It is I assume what google does when you click
    on Similar pages\
  • cited by
  • active bibliography citing
  • users also viewed
  • text similarity
  • co-citation

8
Query Builders
  • spell checkers
  • phonetic tools
  • stemming tools
  • natural language tools
  • controlled vocabulary and thesauri

9
Presenting Results
  • What to display
  • url title opening lines lines containing term
    relevance measure date size
  • How many
  • per page overall
  • Order of display
  • perhaps with sort options alpha, date,
    relevance, popularity, ratings, payola

10
  • Grouping
  • if at all
  • Exporting
  • print, email, selecting subsets, saving a search

11
NextSearch Interface
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