LIR – "Lehr- und Lernsystem Information Retrieval"

Literatur zur Informationserschließung (42.740 records)
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Options:
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Search tips:
  • Query will be performed as "ranked query"
  • Try regular expressions
  • +/-term = term must / must not occur
  • term^number = term's weight gets multiplied by number (=> boost factor)
  • Custom ranking:
    tf = Term frequency
    df = Document frequency
    N = Number of documents in the collection
  • Threshold:
    number(%) = Display only documents with at least a weight of number (percent of the maximum weight)
    @number(%) = Display top number (percent) documents
Sample query: +indexierung ranking.*^1.5 automatisch^-1.5 -thesaurus