Word:

weighted search

(information science)weighted search - A search based on frequencies of the search terms in the documents being searched. Weighted search is often used by search engines. It produces a numerical score for each possible document. A document's score depends on the frequency of each search term in that document compared with the overall frequency of that term in the entire corpus of documents. A common approach is called tf.idf which stands for term frequency * inverse document frequency. Term frequency means "the more often a term occurs in a document, the more important it is in describing that document." http://ciir.cs.umass.edu/cmpsci646/ir4/tsld034.htm Inverse document frequency means the more documents a term appears in, the less important the term is.

A simple weighted search is just a list of search terms, for example: car automobile

Weighted search is often contrasted with boolean search. It is possible to have a search that syntactically is a boolean search but which also does a weighted search.

See also query expansion.

For a detailed technical discussion see Chapter 5, "Search Strategies", in the reference below.

["Information Retrieval", C. J. van Rijsbergen,].
Browse
Weighing cage
Weighing house
weighing machine
Weighlock
Weighmaster
Weight
Weight control
weight down
weight gainer
weight gaining
Weight of evidence
Weight of observation
weight unit
Weight-cycle
weight-lift
weighted
-- weighted search --
Weightily
Weightiness
weighting
Weightless
weightlessness
weightlift
weightlifter
weightlifting
Weighty
Weil
Weil's disease
Weill
Weimar
Weimar Republic
Weimaraner
Weinberg
Definitions Index: # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

About this site and copyright information - Online Dictionary Home - Privacy Policy