Huwebes, Disyembre 19, 2013

Why is Information Retrieval difficult

1. Vocabularies mismatching
Synonymy: e.g. car v.s. automobile
Polysemy: table 
2. Queries are ambiguous, they are partial specification of user's need
3. Content representation may be inadequate and incomplete
4. The user is the ultimate judge, but we don't know how the judges.....
    - the notion of relevance is imprecise, context-and user-dependent.
 

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