Query building


topic and evaluation example    

difficult topic     documents found relevant manually


original query     with synonyms for copyright     retrieval log

Expanded queries    

with one relevant document     retrieval log (one)

with half of relevant documents     retrieval log (half)

2 keywords only     retrieval log (keywords)

Relevant texts   

one relevant text      half of relevant texts


Text categorization

sexreklam     valutakris     valutareserv