Internet search engines

Conclusions of a working group

on Internet retrieval:

• Search engines:

  • differ in depth of indexing
  • make mistakes:
    • They are subject to changes in indexing policy (indexing fluctuations)
    • They forget documents completely (document fluctuations)
    • They miss documents in their result sets (element fluctuations)
      • www.cwi.nl/cwi/projects/IRT/

Why a

gateway?