Document (#35878)

Author
Hock, R.
Title
Search engines
Source
Encyclopedia of library and information sciences. 3rd ed. Ed.: M.J. Bates
Imprint
London : Taylor & Francis
Year
2009
Pages
S.xx-xx
Abstract
This entry provides an overview of Web search engines, looking at the definition, components, leading engines, searching capabilities, and types of engines. It examines the components that make up a search engine and briefly discusses the process involved in identifying content for the engines' databases and the indexing of that content. Typical search options are reviewed and the major Web search engines are identified and described. Also identified and described are various specialty search engines, such as those for special content such as video and images, and engines that take significantly different approaches to the search problem, such as visualization engines and metasearch engines.
Footnote
Vgl.: http://www.tandfonline.com/doi/book/10.1081/E-ELIS3.
Theme
Suchmaschinen

Similar documents (author)

  1. Hock, R.: ¬A new era of search engines : not just Web pages anymore (2002) 5.92
    5.9160414 = sum of:
      5.9160414 = weight(author_txt:hock in 7688) [ClassicSimilarity], result of:
        5.9160414 = fieldWeight in 7688, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.465666 = idf(docFreq=8, maxDocs=42740)
          0.625 = fieldNorm(doc=7688)
    
  2. Hock, R.E.: Sizing up HotBot : evaluating one Web search engine's capabilities (1997) 5.92
    5.9160414 = sum of:
      5.9160414 = weight(author_txt:hock in 2897) [ClassicSimilarity], result of:
        5.9160414 = fieldWeight in 2897, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.465666 = idf(docFreq=8, maxDocs=42740)
          0.625 = fieldNorm(doc=2897)
    
  3. Hock, R.E.: How to do field searching in Web search engines : a field trip (1998) 5.92
    5.9160414 = sum of:
      5.9160414 = weight(author_txt:hock in 4602) [ClassicSimilarity], result of:
        5.9160414 = fieldWeight in 4602, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.465666 = idf(docFreq=8, maxDocs=42740)
          0.625 = fieldNorm(doc=4602)
    
  4. Hock, R.: Web search engines : more features and commands (2000) 5.92
    5.9160414 = sum of:
      5.9160414 = weight(author_txt:hock in 5793) [ClassicSimilarity], result of:
        5.9160414 = fieldWeight in 5793, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.465666 = idf(docFreq=8, maxDocs=42740)
          0.625 = fieldNorm(doc=5793)
    
  5. Hock, R.: ¬The extreme searcher's guide to Web search engines : a handbook for the serious searcher (2001) 5.92
    5.9160414 = sum of:
      5.9160414 = weight(author_txt:hock in 53) [ClassicSimilarity], result of:
        5.9160414 = fieldWeight in 53, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.465666 = idf(docFreq=8, maxDocs=42740)
          0.625 = fieldNorm(doc=53)
    

Similar documents (content)

  1. Spink, A.; Jansen, B.J.; Blakely, C.; Koshman, S.: ¬A study of results overlap and uniqueness among major Web search engines (2006) 0.31
    0.3053493 = sum of:
      0.3053493 = product of:
        1.2722888 = sum of:
          0.03608452 = weight(abstract_txt:engine in 2994) [ClassicSimilarity], result of:
            0.03608452 = score(doc=2994,freq=2.0), product of:
              0.08457644 = queryWeight, product of:
                1.0091678 = boost
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.015192091 = queryNorm
              0.42664978 = fieldWeight in 2994, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.0546875 = fieldNorm(doc=2994)
          0.03221619 = weight(abstract_txt:capabilities in 2994) [ClassicSimilarity], result of:
            0.03221619 = score(doc=2994,freq=1.0), product of:
              0.098801054 = queryWeight, product of:
                1.0907356 = boost
                5.962447 = idf(docFreq=298, maxDocs=42740)
                0.015192091 = queryNorm
              0.32607132 = fieldWeight in 2994, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.962447 = idf(docFreq=298, maxDocs=42740)
                0.0546875 = fieldNorm(doc=2994)
          0.0062611275 = weight(abstract_txt:that in 2994) [ClassicSimilarity], result of:
            0.0062611275 = score(doc=2994,freq=1.0), product of:
              0.047810238 = queryWeight, product of:
                1.3141948 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.015192091 = queryNorm
              0.13095789 = fieldWeight in 2994, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.0546875 = fieldNorm(doc=2994)
          0.1375912 = weight(abstract_txt:metasearch in 2994) [ClassicSimilarity], result of:
            0.1375912 = score(doc=2994,freq=2.0), product of:
              0.20642512 = queryWeight, product of:
                1.5765942 = boost
                8.618368 = idf(docFreq=20, maxDocs=42740)
                0.015192091 = queryNorm
              0.6665429 = fieldWeight in 2994, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.618368 = idf(docFreq=20, maxDocs=42740)
                0.0546875 = fieldNorm(doc=2994)
          0.2135746 = weight(abstract_txt:search in 2994) [ClassicSimilarity], result of:
            0.2135746 = score(doc=2994,freq=17.0), product of:
              0.25939497 = queryWeight, product of:
                4.6759353 = boost
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.015192091 = queryNorm
              0.82335675 = fieldWeight in 2994, product of:
                4.1231055 = tf(freq=17.0), with freq of:
                  17.0 = termFreq=17.0
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.0546875 = fieldNorm(doc=2994)
          0.8465612 = weight(abstract_txt:engines in 2994) [ClassicSimilarity], result of:
            0.8465612 = score(doc=2994,freq=14.0), product of:
              0.78062356 = queryWeight, product of:
                9.695261 = boost
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.015192091 = queryNorm
              1.0844679 = fieldWeight in 2994, product of:
                3.7416575 = tf(freq=14.0), with freq of:
                  14.0 = termFreq=14.0
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.0546875 = fieldNorm(doc=2994)
        0.24 = coord(6/25)
    
  2. Falk, H.: World Wide Web search and retrieval (1997) 0.27
    0.27130172 = sum of:
      0.27130172 = product of:
        1.1304238 = sum of:
          0.08544897 = weight(abstract_txt:briefly in 6884) [ClassicSimilarity], result of:
            0.08544897 = score(doc=6884,freq=1.0), product of:
              0.09402183 = queryWeight, product of:
                1.0640279 = boost
                5.8164515 = idf(docFreq=345, maxDocs=42740)
                0.015192091 = queryNorm
              0.90882057 = fieldWeight in 6884, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.8164515 = idf(docFreq=345, maxDocs=42740)
                0.15625 = fieldNorm(doc=6884)
          0.10058677 = weight(abstract_txt:reviewed in 6884) [ClassicSimilarity], result of:
            0.10058677 = score(doc=6884,freq=1.0), product of:
              0.10482174 = queryWeight, product of:
                1.1234775 = boost
                6.1414294 = idf(docFreq=249, maxDocs=42740)
                0.015192091 = queryNorm
              0.95959836 = fieldWeight in 6884, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.1414294 = idf(docFreq=249, maxDocs=42740)
                0.15625 = fieldNorm(doc=6884)
          0.0535476 = weight(abstract_txt:such in 6884) [ClassicSimilarity], result of:
            0.0535476 = score(doc=6884,freq=1.0), product of:
              0.09930198 = queryWeight, product of:
                1.8939925 = boost
                3.451136 = idf(docFreq=3683, maxDocs=42740)
                0.015192091 = queryNorm
              0.53924 = fieldWeight in 6884, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.451136 = idf(docFreq=3683, maxDocs=42740)
                0.15625 = fieldNorm(doc=6884)
          0.0964049 = weight(abstract_txt:content in 6884) [ClassicSimilarity], result of:
            0.0964049 = score(doc=6884,freq=1.0), product of:
              0.14695938 = queryWeight, product of:
                2.3040822 = boost
                4.1983805 = idf(docFreq=1744, maxDocs=42740)
                0.015192091 = queryNorm
              0.6559969 = fieldWeight in 6884, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.1983805 = idf(docFreq=1744, maxDocs=42740)
                0.15625 = fieldNorm(doc=6884)
          0.14799842 = weight(abstract_txt:search in 6884) [ClassicSimilarity], result of:
            0.14799842 = score(doc=6884,freq=1.0), product of:
              0.25939497 = queryWeight, product of:
                4.6759353 = boost
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.015192091 = queryNorm
              0.5705524 = fieldWeight in 6884, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.15625 = fieldNorm(doc=6884)
          0.6464371 = weight(abstract_txt:engines in 6884) [ClassicSimilarity], result of:
            0.6464371 = score(doc=6884,freq=1.0), product of:
              0.78062356 = queryWeight, product of:
                9.695261 = boost
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.015192091 = queryNorm
              0.8281035 = fieldWeight in 6884, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.15625 = fieldNorm(doc=6884)
        0.24 = coord(6/25)
    
  3. Howe, A.E.; Dreilinger, D.: SavvySearch: a metasearch engine that learns with search engines to query (1997) 0.27
    0.2701419 = sum of:
      0.2701419 = product of:
        1.6883869 = sum of:
          0.051031217 = weight(abstract_txt:engine in 2191) [ClassicSimilarity], result of:
            0.051031217 = score(doc=2191,freq=1.0), product of:
              0.08457644 = queryWeight, product of:
                1.0091678 = boost
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.015192091 = queryNorm
              0.6033739 = fieldWeight in 2191, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.109375 = fieldNorm(doc=2191)
          0.2751824 = weight(abstract_txt:metasearch in 2191) [ClassicSimilarity], result of:
            0.2751824 = score(doc=2191,freq=2.0), product of:
              0.20642512 = queryWeight, product of:
                1.5765942 = boost
                8.618368 = idf(docFreq=20, maxDocs=42740)
                0.015192091 = queryNorm
              1.3330858 = fieldWeight in 2191, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.618368 = idf(docFreq=20, maxDocs=42740)
                0.109375 = fieldNorm(doc=2191)
          0.25376445 = weight(abstract_txt:search in 2191) [ClassicSimilarity], result of:
            0.25376445 = score(doc=2191,freq=6.0), product of:
              0.25939497 = queryWeight, product of:
                4.6759353 = boost
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.015192091 = queryNorm
              0.97829366 = fieldWeight in 2191, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.109375 = fieldNorm(doc=2191)
          1.1084088 = weight(abstract_txt:engines in 2191) [ClassicSimilarity], result of:
            1.1084088 = score(doc=2191,freq=6.0), product of:
              0.78062356 = queryWeight, product of:
                9.695261 = boost
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.015192091 = queryNorm
              1.4199018 = fieldWeight in 2191, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.109375 = fieldNorm(doc=2191)
        0.16 = coord(4/25)
    
  4. Jansen, B.J.; Spink, A.; Koshman, S.: Web searcher interaction with the Dogpile.com metasearch engine (2007) 0.25
    0.25344408 = sum of:
      0.25344408 = product of:
        1.056017 = sum of:
          0.04123945 = weight(abstract_txt:engine in 2271) [ClassicSimilarity], result of:
            0.04123945 = score(doc=2271,freq=2.0), product of:
              0.08457644 = queryWeight, product of:
                1.0091678 = boost
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.015192091 = queryNorm
              0.48759976 = fieldWeight in 2271, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.0625 = fieldNorm(doc=2271)
          0.007155575 = weight(abstract_txt:that in 2271) [ClassicSimilarity], result of:
            0.007155575 = score(doc=2271,freq=1.0), product of:
              0.047810238 = queryWeight, product of:
                1.3141948 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.015192091 = queryNorm
              0.14966616 = fieldWeight in 2271, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.0625 = fieldNorm(doc=2271)
          0.27235994 = weight(abstract_txt:metasearch in 2271) [ClassicSimilarity], result of:
            0.27235994 = score(doc=2271,freq=6.0), product of:
              0.20642512 = queryWeight, product of:
                1.5765942 = boost
                8.618368 = idf(docFreq=20, maxDocs=42740)
                0.015192091 = queryNorm
              1.3194128 = fieldWeight in 2271, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                8.618368 = idf(docFreq=20, maxDocs=42740)
                0.0625 = fieldNorm(doc=2271)
          0.05453485 = weight(abstract_txt:content in 2271) [ClassicSimilarity], result of:
            0.05453485 = score(doc=2271,freq=2.0), product of:
              0.14695938 = queryWeight, product of:
                2.3040822 = boost
                4.1983805 = idf(docFreq=1744, maxDocs=42740)
                0.015192091 = queryNorm
              0.3710879 = fieldWeight in 2271, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.1983805 = idf(docFreq=1744, maxDocs=42740)
                0.0625 = fieldNorm(doc=2271)
          0.10253632 = weight(abstract_txt:search in 2271) [ClassicSimilarity], result of:
            0.10253632 = score(doc=2271,freq=3.0), product of:
              0.25939497 = queryWeight, product of:
                4.6759353 = boost
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.015192091 = queryNorm
              0.39529032 = fieldWeight in 2271, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.0625 = fieldNorm(doc=2271)
          0.5781909 = weight(abstract_txt:engines in 2271) [ClassicSimilarity], result of:
            0.5781909 = score(doc=2271,freq=5.0), product of:
              0.78062356 = queryWeight, product of:
                9.695261 = boost
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.015192091 = queryNorm
              0.7406783 = fieldWeight in 2271, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.0625 = fieldNorm(doc=2271)
        0.24 = coord(6/25)
    
  5. Tjondronegoro, D.; Spink, A.: Web search engine multimedia functionality (2008) 0.25
    0.24586697 = sum of:
      0.24586697 = product of:
        1.2293348 = sum of:
          0.05049098 = weight(abstract_txt:video in 4039) [ClassicSimilarity], result of:
            0.05049098 = score(doc=4039,freq=1.0), product of:
              0.10509612 = queryWeight, product of:
                1.1249468 = boost
                6.1494617 = idf(docFreq=247, maxDocs=42740)
                0.015192091 = queryNorm
              0.4804267 = fieldWeight in 4039, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.1494617 = idf(docFreq=247, maxDocs=42740)
                0.078125 = fieldNorm(doc=4039)
          0.008944469 = weight(abstract_txt:that in 4039) [ClassicSimilarity], result of:
            0.008944469 = score(doc=4039,freq=1.0), product of:
              0.047810238 = queryWeight, product of:
                1.3141948 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.015192091 = queryNorm
              0.18708271 = fieldWeight in 4039, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.078125 = fieldNorm(doc=4039)
          0.037863873 = weight(abstract_txt:such in 4039) [ClassicSimilarity], result of:
            0.037863873 = score(doc=4039,freq=2.0), product of:
              0.09930198 = queryWeight, product of:
                1.8939925 = boost
                3.451136 = idf(docFreq=3683, maxDocs=42740)
                0.015192091 = queryNorm
              0.38130027 = fieldWeight in 4039, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.451136 = idf(docFreq=3683, maxDocs=42740)
                0.078125 = fieldNorm(doc=4039)
          0.2768797 = weight(abstract_txt:search in 4039) [ClassicSimilarity], result of:
            0.2768797 = score(doc=4039,freq=14.0), product of:
              0.25939497 = queryWeight, product of:
                4.6759353 = boost
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.015192091 = queryNorm
              1.0674058 = fieldWeight in 4039, product of:
                3.7416575 = tf(freq=14.0), with freq of:
                  14.0 = termFreq=14.0
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.078125 = fieldNorm(doc=4039)
          0.8551559 = weight(abstract_txt:engines in 4039) [ClassicSimilarity], result of:
            0.8551559 = score(doc=4039,freq=7.0), product of:
              0.78062356 = queryWeight, product of:
                9.695261 = boost
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.015192091 = queryNorm
              1.0954779 = fieldWeight in 4039, product of:
                2.6457512 = tf(freq=7.0), with freq of:
                  7.0 = termFreq=7.0
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.078125 = fieldNorm(doc=4039)
        0.2 = coord(5/25)