Document (#1197)

Author
Weintraub, D.K.
Title
¬An extended review of PRECIS
Source
Library resources and technical services. 23(1979), S.101-115
Year
1979
Abstract
The PRECIS system of subject headings was designed for use with a computer-produced subject index. Accordingly, the routines of subject heading work are clearly differentiated into clerical procedures and those that require judgement. The clerical procedures can be accomplished largely through the use of computer programs. The subject headings represent a unique combination of several different characteristics. As a result the system permits several coextensive forms of a subject name for each work. The allowable forms of subject name are restricted somewhat by the constraints of the system but the final choice amongst the various alternatives is made by the subject analyst. Often, this choice reflects his or her usage rather than any attempt to realize an explicit code for subject names. There is some evidence that this judgement varies in individual cases. Moreover, there is no empirical evidence that the alternatives permitted do reflect user convenience - although, in fact, this may be true
Theme
Preserved Context Index System (PRECIS)
Object
PRECIS

Similar documents (content)

  1. Austin, D.: PRECIS (2009) 0.24
    0.24114487 = sum of:
      0.24114487 = product of:
        2.0095406 = sum of:
          0.026409816 = weight(abstract_txt:there in 1985) [ClassicSimilarity], result of:
            0.026409816 = score(doc=1985,freq=1.0), product of:
              0.08256926 = queryWeight, product of:
                1.0804018 = boost
                4.094086 = idf(docFreq=2012, maxDocs=44421)
                0.018667068 = queryNorm
              0.31985047 = fieldWeight in 1985, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.094086 = idf(docFreq=2012, maxDocs=44421)
                0.078125 = fieldNorm(doc=1985)
          0.031322964 = weight(abstract_txt:system in 1985) [ClassicSimilarity], result of:
            0.031322964 = score(doc=1985,freq=2.0), product of:
              0.08405633 = queryWeight, product of:
                1.335079 = boost
                3.372775 = idf(docFreq=4140, maxDocs=44421)
                0.018667068 = queryNorm
              0.37264252 = fieldWeight in 1985, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.372775 = idf(docFreq=4140, maxDocs=44421)
                0.078125 = fieldNorm(doc=1985)
          1.9518079 = weight(title_txt:precis in 1985) [ClassicSimilarity], result of:
            1.9518079 = score(doc=1985,freq=1.0), product of:
              0.2657416 = queryWeight, product of:
                1.9382324 = boost
                7.344759 = idf(docFreq=77, maxDocs=44421)
                0.018667068 = queryNorm
              7.344759 = fieldWeight in 1985, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.344759 = idf(docFreq=77, maxDocs=44421)
                1.0 = fieldNorm(doc=1985)
        0.12 = coord(3/25)
    
  2. Austin, D.; Digger, J.A.: PRECIS: The Preserved Context Index System (1985) 0.21
    0.21476652 = sum of:
      0.21476652 = product of:
        0.8948605 = sum of:
          0.020941583 = weight(abstract_txt:work in 4652) [ClassicSimilarity], result of:
            0.020941583 = score(doc=4652,freq=4.0), product of:
              0.07073719 = queryWeight, product of:
                3.7894108 = idf(docFreq=2729, maxDocs=44421)
                0.018667068 = queryNorm
              0.29604772 = fieldWeight in 4652, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.7894108 = idf(docFreq=2729, maxDocs=44421)
                0.0390625 = fieldNorm(doc=4652)
          0.034628995 = weight(abstract_txt:computer in 4652) [ClassicSimilarity], result of:
            0.034628995 = score(doc=4652,freq=5.0), product of:
              0.0918258 = queryWeight, product of:
                1.1393534 = boost
                4.317478 = idf(docFreq=1609, maxDocs=44421)
                0.018667068 = queryNorm
              0.3771162 = fieldWeight in 4652, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.317478 = idf(docFreq=1609, maxDocs=44421)
                0.0390625 = fieldNorm(doc=4652)
          0.035020135 = weight(abstract_txt:system in 4652) [ClassicSimilarity], result of:
            0.035020135 = score(doc=4652,freq=10.0), product of:
              0.08405633 = queryWeight, product of:
                1.335079 = boost
                3.372775 = idf(docFreq=4140, maxDocs=44421)
                0.018667068 = queryNorm
              0.416627 = fieldWeight in 4652, product of:
                3.1622777 = tf(freq=10.0), with freq of:
                  10.0 = termFreq=10.0
                3.372775 = idf(docFreq=4140, maxDocs=44421)
                0.0390625 = fieldNorm(doc=4652)
          0.026333442 = weight(abstract_txt:headings in 4652) [ClassicSimilarity], result of:
            0.026333442 = score(doc=4652,freq=1.0), product of:
              0.13081771 = queryWeight, product of:
                1.3599075 = boost
                5.1532483 = idf(docFreq=697, maxDocs=44421)
                0.018667068 = queryNorm
              0.20129876 = fieldWeight in 4652, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.1532483 = idf(docFreq=697, maxDocs=44421)
                0.0390625 = fieldNorm(doc=4652)
          0.731928 = weight(title_txt:precis in 4652) [ClassicSimilarity], result of:
            0.731928 = score(doc=4652,freq=1.0), product of:
              0.2657416 = queryWeight, product of:
                1.9382324 = boost
                7.344759 = idf(docFreq=77, maxDocs=44421)
                0.018667068 = queryNorm
              2.7542846 = fieldWeight in 4652, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.344759 = idf(docFreq=77, maxDocs=44421)
                0.375 = fieldNorm(doc=4652)
          0.04600832 = weight(abstract_txt:subject in 4652) [ClassicSimilarity], result of:
            0.04600832 = score(doc=4652,freq=1.0), product of:
              0.30123517 = queryWeight, product of:
                4.1272326 = boost
                3.9099448 = idf(docFreq=2419, maxDocs=44421)
                0.018667068 = queryNorm
              0.15273222 = fieldWeight in 4652, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9099448 = idf(docFreq=2419, maxDocs=44421)
                0.0390625 = fieldNorm(doc=4652)
        0.24 = coord(6/25)
    
  3. DeHart, F.E.; Glazier, J.: Computer searching on PRECIS : an exploration of measuring comparative retrieval effectiveness (1984) 0.16
    0.15905793 = sum of:
      0.15905793 = product of:
        0.79528964 = sum of:
          0.025129901 = weight(abstract_txt:work in 827) [ClassicSimilarity], result of:
            0.025129901 = score(doc=827,freq=1.0), product of:
              0.07073719 = queryWeight, product of:
                3.7894108 = idf(docFreq=2729, maxDocs=44421)
                0.018667068 = queryNorm
              0.35525727 = fieldWeight in 827, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7894108 = idf(docFreq=2729, maxDocs=44421)
                0.09375 = fieldNorm(doc=827)
          0.06437641 = weight(abstract_txt:computer in 827) [ClassicSimilarity], result of:
            0.06437641 = score(doc=827,freq=3.0), product of:
              0.0918258 = queryWeight, product of:
                1.1393534 = boost
                4.317478 = idf(docFreq=1609, maxDocs=44421)
                0.018667068 = queryNorm
              0.701071 = fieldWeight in 827, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.317478 = idf(docFreq=1609, maxDocs=44421)
                0.09375 = fieldNorm(doc=827)
          0.026578415 = weight(abstract_txt:system in 827) [ClassicSimilarity], result of:
            0.026578415 = score(doc=827,freq=1.0), product of:
              0.08405633 = queryWeight, product of:
                1.335079 = boost
                3.372775 = idf(docFreq=4140, maxDocs=44421)
                0.018667068 = queryNorm
              0.31619766 = fieldWeight in 827, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.372775 = idf(docFreq=4140, maxDocs=44421)
                0.09375 = fieldNorm(doc=827)
          0.48795196 = weight(title_txt:precis in 827) [ClassicSimilarity], result of:
            0.48795196 = score(doc=827,freq=1.0), product of:
              0.2657416 = queryWeight, product of:
                1.9382324 = boost
                7.344759 = idf(docFreq=77, maxDocs=44421)
                0.018667068 = queryNorm
              1.8361897 = fieldWeight in 827, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.344759 = idf(docFreq=77, maxDocs=44421)
                0.25 = fieldNorm(doc=827)
          0.19125298 = weight(abstract_txt:subject in 827) [ClassicSimilarity], result of:
            0.19125298 = score(doc=827,freq=3.0), product of:
              0.30123517 = queryWeight, product of:
                4.1272326 = boost
                3.9099448 = idf(docFreq=2419, maxDocs=44421)
                0.018667068 = queryNorm
              0.6348959 = fieldWeight in 827, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.9099448 = idf(docFreq=2419, maxDocs=44421)
                0.09375 = fieldNorm(doc=827)
        0.2 = coord(5/25)
    
  4. Mahapatra, M.; Biswas, S.C.: Efficiency of PRECIS role operators (1984) 0.16
    0.15824366 = sum of:
      0.15824366 = product of:
        0.9890229 = sum of:
          0.020941583 = weight(abstract_txt:work in 1781) [ClassicSimilarity], result of:
            0.020941583 = score(doc=1781,freq=1.0), product of:
              0.07073719 = queryWeight, product of:
                3.7894108 = idf(docFreq=2729, maxDocs=44421)
                0.018667068 = queryNorm
              0.29604772 = fieldWeight in 1781, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7894108 = idf(docFreq=2729, maxDocs=44421)
                0.078125 = fieldNorm(doc=1781)
          0.022148682 = weight(abstract_txt:system in 1781) [ClassicSimilarity], result of:
            0.022148682 = score(doc=1781,freq=1.0), product of:
              0.08405633 = queryWeight, product of:
                1.335079 = boost
                3.372775 = idf(docFreq=4140, maxDocs=44421)
                0.018667068 = queryNorm
              0.26349807 = fieldWeight in 1781, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.372775 = idf(docFreq=4140, maxDocs=44421)
                0.078125 = fieldNorm(doc=1781)
          0.853916 = weight(title_txt:precis in 1781) [ClassicSimilarity], result of:
            0.853916 = score(doc=1781,freq=1.0), product of:
              0.2657416 = queryWeight, product of:
                1.9382324 = boost
                7.344759 = idf(docFreq=77, maxDocs=44421)
                0.018667068 = queryNorm
              3.2133322 = fieldWeight in 1781, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.344759 = idf(docFreq=77, maxDocs=44421)
                0.4375 = fieldNorm(doc=1781)
          0.09201664 = weight(abstract_txt:subject in 1781) [ClassicSimilarity], result of:
            0.09201664 = score(doc=1781,freq=1.0), product of:
              0.30123517 = queryWeight, product of:
                4.1272326 = boost
                3.9099448 = idf(docFreq=2419, maxDocs=44421)
                0.018667068 = queryNorm
              0.30546445 = fieldWeight in 1781, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9099448 = idf(docFreq=2419, maxDocs=44421)
                0.078125 = fieldNorm(doc=1781)
        0.16 = coord(4/25)
    
  5. Bidd, D.; Chevigny, L. de; Marshall, M.: PRECIS for subject access in a national audiovisual information system (1986) 0.15
    0.15004161 = sum of:
      0.15004161 = product of:
        0.9377601 = sum of:
          0.037587553 = weight(abstract_txt:system in 2917) [ClassicSimilarity], result of:
            0.037587553 = score(doc=2917,freq=2.0), product of:
              0.08405633 = queryWeight, product of:
                1.335079 = boost
                3.372775 = idf(docFreq=4140, maxDocs=44421)
                0.018667068 = queryNorm
              0.447171 = fieldWeight in 2917, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.372775 = idf(docFreq=4140, maxDocs=44421)
                0.09375 = fieldNorm(doc=2917)
          0.09897972 = weight(abstract_txt:choice in 2917) [ClassicSimilarity], result of:
            0.09897972 = score(doc=2917,freq=1.0), product of:
              0.17642146 = queryWeight, product of:
                1.5792534 = boost
                5.98444 = idf(docFreq=303, maxDocs=44421)
                0.018667068 = queryNorm
              0.56104124 = fieldWeight in 2917, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.98444 = idf(docFreq=303, maxDocs=44421)
                0.09375 = fieldNorm(doc=2917)
          0.60993993 = weight(title_txt:precis in 2917) [ClassicSimilarity], result of:
            0.60993993 = score(doc=2917,freq=1.0), product of:
              0.2657416 = queryWeight, product of:
                1.9382324 = boost
                7.344759 = idf(docFreq=77, maxDocs=44421)
                0.018667068 = queryNorm
              2.295237 = fieldWeight in 2917, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.344759 = idf(docFreq=77, maxDocs=44421)
                0.3125 = fieldNorm(doc=2917)
          0.19125298 = weight(abstract_txt:subject in 2917) [ClassicSimilarity], result of:
            0.19125298 = score(doc=2917,freq=3.0), product of:
              0.30123517 = queryWeight, product of:
                4.1272326 = boost
                3.9099448 = idf(docFreq=2419, maxDocs=44421)
                0.018667068 = queryNorm
              0.6348959 = fieldWeight in 2917, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.9099448 = idf(docFreq=2419, maxDocs=44421)
                0.09375 = fieldNorm(doc=2917)
        0.16 = coord(4/25)