TileBars: Visualization of Term Distribution Information in Full Text Information Access

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TileBars Visualization of Term Distribution
Information in Full Text Information Access

• Presenter Reenal Mahajan
• Discusser Xueqi

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Tilebars

• What are Tilebars?
• Why do we need them?
• Titles abstracts vs. Full length texts
• Context and structure
• Response to a query
• Mantra used?
• Show relative length of each retrieved document
• Show the frequency of the topic words
• Show the distribution of the topic words

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Standard information retrieval

• Two common approaches- Similarity search and
  Boolean queries.

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Problems with standard information retrieval

• Reasons behind relevance rankings is unclear
• Length of the document cannot be read easily
• Term distribution not known
• No way to express preferences

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Importance of document structure

• Different document structures
• Many subtopic discussions
• Sequence of subtopics set against a backdrop of
  one or more main topics
• User should be able to query about a coherent
  subpart or subtopic
• TextTiling

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TileBar
TextTiling
Term sets
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Results for the query Medical Diagnosis
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Specifying constraints.
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Implementation notes

• Current implementation makes use of 132000
  documents of the Ziff portion
• The interface uses the Tcl/TK X11-based toolkit
• The search engine uses TDB implemented in Common
  Lisp

Demo
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Pros and Cons

• Displays the term distribution information along
  with relevance information.
• Passage based retrieval
• The patterns can be quickly scanned and
  deciphered aiding fast judgment
• Sometimes the TileBars can be misleading because
  the user did not specify all the words in the
  query that might be used to discuss a topic.

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Related work
The cube of contents
Infocrystal
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Conclusions and Future Work

• User studies should be done to determine how
  users interpret the meaning of the term
  distributions and how they may be used in
  relevance feedback
• Determine in what situations the users'
  expectations are not met
• Determine what additional information will help
  prevent misconceptions