Document (#20653)

Author

Vries, S. de

Title

Points of interest concerning the new IPC

Source

World patent information. 11(1989) no.3, S.115-120

Year

1989

Abstract

The International Patent Classification (IPC) is widely regarded as an important search tool, both by patent offices and by outside users. To maintain its usefulness, the classification schemes of the IPC have to be adapted in order to provide for new techniques and to keep the size of the search files managerable. Such adaptation is done by amending the classification schemes, or by introducing hybrid systems. In the 5th edition of the IPC, both approaches have been followed: in comparison with the 4th edition, the number of hybrid systems introduced has sharply increased. The use of hybrid systems is strongly recommended: it is, however, non-obligatory, at least for the near future.

Field

Patentinformation

Object

IPC

Similar documents (author)

1. Vries, D.D.: Automation of a map catalogue within the Pica-system : its evident profits and unsolved implications (1992) 5.76

   5.7603507 = sum of:
     5.7603507 = weight(author_txt:vries in 96) [ClassicSimilarity], result of:
       5.7603507 = fieldWeight in 96, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.216561 = idf(docFreq=11, maxDocs=44421)
         0.625 = fieldNorm(doc=96)
   

2. Vries Robbé, P.F. de: Knowledge representation in relation to ISO principles and methods of terminology (1987) 4.61

   4.6082807 = sum of:
     4.6082807 = weight(author_txt:vries in 660) [ClassicSimilarity], result of:
       4.6082807 = fieldWeight in 660, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.216561 = idf(docFreq=11, maxDocs=44421)
         0.5 = fieldNorm(doc=660)
   

3. Vries, H. de: ¬The classification of standards (1998) 4.61

   4.6082807 = sum of:
     4.6082807 = weight(author_txt:vries in 4073) [ClassicSimilarity], result of:
       4.6082807 = fieldWeight in 4073, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.216561 = idf(docFreq=11, maxDocs=44421)
         0.5 = fieldNorm(doc=4073)
   

4. Vries, H.J. de: Terminology : what's in a name (1997) 4.61

   4.6082807 = sum of:
     4.6082807 = weight(author_txt:vries in 5547) [ClassicSimilarity], result of:
       4.6082807 = fieldWeight in 5547, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.216561 = idf(docFreq=11, maxDocs=44421)
         0.5 = fieldNorm(doc=5547)
   

5. Vries, A.P. de: Content independence in multimedia databases (2001) 4.61

   4.6082807 = sum of:
     4.6082807 = weight(author_txt:vries in 534) [ClassicSimilarity], result of:
       4.6082807 = fieldWeight in 534, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.216561 = idf(docFreq=11, maxDocs=44421)
         0.5 = fieldNorm(doc=534)
   

Similar documents (content)

1. Schweikhardt, F.: Some thoughts on hybrid systems especially for patent documentation (1989) 0.32

   0.32090813 = sum of:
     0.32090813 = product of:
       1.6045406 = sum of:
         0.35259286 = weight(abstract_txt:offices in 1935) [ClassicSimilarity], result of:
           0.35259286 = score(doc=1935,freq=1.0), product of:
             0.2316466 = queryWeight, product of:
               1.3774818 = boost
               8.117949 = idf(docFreq=35, maxDocs=44421)
               0.020715421 = queryNorm
             1.5221153 = fieldWeight in 1935, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.117949 = idf(docFreq=35, maxDocs=44421)
               0.1875 = fieldNorm(doc=1935)
         0.07848161 = weight(abstract_txt:systems in 1935) [ClassicSimilarity], result of:
           0.07848161 = score(doc=1935,freq=1.0), product of:
             0.1227051 = queryWeight, product of:
               1.7364602 = boost
               3.411175 = idf(docFreq=3984, maxDocs=44421)
               0.020715421 = queryNorm
             0.6395953 = fieldWeight in 1935, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.411175 = idf(docFreq=3984, maxDocs=44421)
               0.1875 = fieldNorm(doc=1935)
         0.12579967 = weight(abstract_txt:classification in 1935) [ClassicSimilarity], result of:
           0.12579967 = score(doc=1935,freq=1.0), product of:
             0.16806231 = queryWeight, product of:
               2.0322106 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.020715421 = queryNorm
             0.7485299 = fieldWeight in 1935, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.1875 = fieldNorm(doc=1935)
         0.43884534 = weight(abstract_txt:patent in 1935) [ClassicSimilarity], result of:
           0.43884534 = score(doc=1935,freq=1.0), product of:
             0.33769757 = queryWeight, product of:
               2.352079 = boost
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.020715421 = queryNorm
             1.2995218 = fieldWeight in 1935, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.1875 = fieldNorm(doc=1935)
         0.60882103 = weight(abstract_txt:hybrid in 1935) [ClassicSimilarity], result of:
           0.60882103 = score(doc=1935,freq=1.0), product of:
             0.48085093 = queryWeight, product of:
               3.4374688 = boost
               6.7527075 = idf(docFreq=140, maxDocs=44421)
               0.020715421 = queryNorm
             1.2661326 = fieldWeight in 1935, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.7527075 = idf(docFreq=140, maxDocs=44421)
               0.1875 = fieldNorm(doc=1935)
       0.2 = coord(5/25)
   

2. Nishikawa, M.: Usefulness of hybrid systems in computerised searches (1990) 0.24

   0.24031381 = sum of:
     0.24031381 = product of:
       1.2015691 = sum of:
         0.04289357 = weight(abstract_txt:search in 4131) [ClassicSimilarity], result of:
           0.04289357 = score(doc=4131,freq=1.0), product of:
             0.093895026 = queryWeight, product of:
               1.2402499 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.020715421 = queryNorm
             0.45682475 = fieldWeight in 4131, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.125 = fieldNorm(doc=4131)
         0.052321073 = weight(abstract_txt:systems in 4131) [ClassicSimilarity], result of:
           0.052321073 = score(doc=4131,freq=1.0), product of:
             0.1227051 = queryWeight, product of:
               1.7364602 = boost
               3.411175 = idf(docFreq=3984, maxDocs=44421)
               0.020715421 = queryNorm
             0.42639688 = fieldWeight in 4131, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.411175 = idf(docFreq=3984, maxDocs=44421)
               0.125 = fieldNorm(doc=4131)
         0.118605055 = weight(abstract_txt:classification in 4131) [ClassicSimilarity], result of:
           0.118605055 = score(doc=4131,freq=2.0), product of:
             0.16806231 = queryWeight, product of:
               2.0322106 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.020715421 = queryNorm
             0.7057207 = fieldWeight in 4131, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.125 = fieldNorm(doc=4131)
         0.41374737 = weight(abstract_txt:patent in 4131) [ClassicSimilarity], result of:
           0.41374737 = score(doc=4131,freq=2.0), product of:
             0.33769757 = queryWeight, product of:
               2.352079 = boost
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.020715421 = queryNorm
             1.2252009 = fieldWeight in 4131, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.125 = fieldNorm(doc=4131)
         0.574002 = weight(abstract_txt:hybrid in 4131) [ClassicSimilarity], result of:
           0.574002 = score(doc=4131,freq=2.0), product of:
             0.48085093 = queryWeight, product of:
               3.4374688 = boost
               6.7527075 = idf(docFreq=140, maxDocs=44421)
               0.020715421 = queryNorm
             1.1937213 = fieldWeight in 4131, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.7527075 = idf(docFreq=140, maxDocs=44421)
               0.125 = fieldNorm(doc=4131)
       0.2 = coord(5/25)
   

3. Hansson, B.; Makarov, M.: ¬The sixth edition of the IPC (1995) 0.20

   0.19994429 = sum of:
     0.19994429 = product of:
       0.8331012 = sum of:
         0.069376685 = weight(abstract_txt:concerning in 1685) [ClassicSimilarity], result of:
           0.069376685 = score(doc=1685,freq=1.0), product of:
             0.12439586 = queryWeight, product of:
               1.0094292 = boost
               5.948895 = idf(docFreq=314, maxDocs=44421)
               0.020715421 = queryNorm
             0.5577089 = fieldWeight in 1685, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.948895 = idf(docFreq=314, maxDocs=44421)
               0.09375 = fieldNorm(doc=1685)
         0.039240804 = weight(abstract_txt:systems in 1685) [ClassicSimilarity], result of:
           0.039240804 = score(doc=1685,freq=1.0), product of:
             0.1227051 = queryWeight, product of:
               1.7364602 = boost
               3.411175 = idf(docFreq=3984, maxDocs=44421)
               0.020715421 = queryNorm
             0.31979766 = fieldWeight in 1685, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.411175 = idf(docFreq=3984, maxDocs=44421)
               0.09375 = fieldNorm(doc=1685)
         0.11169677 = weight(abstract_txt:schemes in 1685) [ClassicSimilarity], result of:
           0.11169677 = score(doc=1685,freq=1.0), product of:
             0.21529503 = queryWeight, product of:
               1.8780403 = boost
               5.5339513 = idf(docFreq=476, maxDocs=44421)
               0.020715421 = queryNorm
             0.51880795 = fieldWeight in 1685, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5339513 = idf(docFreq=476, maxDocs=44421)
               0.09375 = fieldNorm(doc=1685)
         0.08895379 = weight(abstract_txt:classification in 1685) [ClassicSimilarity], result of:
           0.08895379 = score(doc=1685,freq=2.0), product of:
             0.16806231 = queryWeight, product of:
               2.0322106 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.020715421 = queryNorm
             0.52929056 = fieldWeight in 1685, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.09375 = fieldNorm(doc=1685)
         0.21942267 = weight(abstract_txt:patent in 1685) [ClassicSimilarity], result of:
           0.21942267 = score(doc=1685,freq=1.0), product of:
             0.33769757 = queryWeight, product of:
               2.352079 = boost
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.020715421 = queryNorm
             0.6497609 = fieldWeight in 1685, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.09375 = fieldNorm(doc=1685)
         0.30441052 = weight(abstract_txt:hybrid in 1685) [ClassicSimilarity], result of:
           0.30441052 = score(doc=1685,freq=1.0), product of:
             0.48085093 = queryWeight, product of:
               3.4374688 = boost
               6.7527075 = idf(docFreq=140, maxDocs=44421)
               0.020715421 = queryNorm
             0.6330663 = fieldWeight in 1685, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.7527075 = idf(docFreq=140, maxDocs=44421)
               0.09375 = fieldNorm(doc=1685)
       0.24 = coord(6/25)
   

4. White, M.J.: Patents and patent searching (2009) 0.18

   0.1755615 = sum of:
     0.1755615 = product of:
       0.8778075 = sum of:
         0.031154066 = weight(abstract_txt:have in 846) [ClassicSimilarity], result of:
           0.031154066 = score(doc=846,freq=3.0), product of:
             0.071961 = queryWeight, product of:
               1.0857667 = boost
               3.199388 = idf(docFreq=4924, maxDocs=44421)
               0.020715421 = queryNorm
             0.43292987 = fieldWeight in 846, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.199388 = idf(docFreq=4924, maxDocs=44421)
               0.078125 = fieldNorm(doc=846)
         0.03791292 = weight(abstract_txt:search in 846) [ClassicSimilarity], result of:
           0.03791292 = score(doc=846,freq=2.0), product of:
             0.093895026 = queryWeight, product of:
               1.2402499 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.020715421 = queryNorm
             0.40377986 = fieldWeight in 846, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.078125 = fieldNorm(doc=846)
         0.20776732 = weight(abstract_txt:offices in 846) [ClassicSimilarity], result of:
           0.20776732 = score(doc=846,freq=2.0), product of:
             0.2316466 = queryWeight, product of:
               1.3774818 = boost
               8.117949 = idf(docFreq=35, maxDocs=44421)
               0.020715421 = queryNorm
             0.8969151 = fieldWeight in 846, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.117949 = idf(docFreq=35, maxDocs=44421)
               0.078125 = fieldNorm(doc=846)
         0.052416526 = weight(abstract_txt:classification in 846) [ClassicSimilarity], result of:
           0.052416526 = score(doc=846,freq=1.0), product of:
             0.16806231 = queryWeight, product of:
               2.0322106 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.020715421 = queryNorm
             0.31188744 = fieldWeight in 846, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.078125 = fieldNorm(doc=846)
         0.5485567 = weight(abstract_txt:patent in 846) [ClassicSimilarity], result of:
           0.5485567 = score(doc=846,freq=9.0), product of:
             0.33769757 = queryWeight, product of:
               2.352079 = boost
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.020715421 = queryNorm
             1.6244023 = fieldWeight in 846, product of:
               3.0 = tf(freq=9.0), with freq of:
                 9.0 = termFreq=9.0
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.078125 = fieldNorm(doc=846)
       0.2 = coord(5/25)
   

5. Liu, D.-R.; Shih, M.-J.: Hybrid-patent classification based on patent-network analysis (2011) 0.17

   0.17203175 = sum of:
     0.17203175 = product of:
       1.0751984 = sum of:
         0.065414205 = weight(abstract_txt:maintain in 189) [ClassicSimilarity], result of:
           0.065414205 = score(doc=189,freq=1.0), product of:
             0.15673734 = queryWeight, product of:
               1.1330763 = boost
               6.677587 = idf(docFreq=151, maxDocs=44421)
               0.020715421 = queryNorm
             0.4173492 = fieldWeight in 189, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.677587 = idf(docFreq=151, maxDocs=44421)
               0.0625 = fieldNorm(doc=189)
         0.110944875 = weight(abstract_txt:classification in 189) [ClassicSimilarity], result of:
           0.110944875 = score(doc=189,freq=7.0), product of:
             0.16806231 = queryWeight, product of:
               2.0322106 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.020715421 = queryNorm
             0.6601413 = fieldWeight in 189, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.0625 = fieldNorm(doc=189)
         0.54733634 = weight(abstract_txt:patent in 189) [ClassicSimilarity], result of:
           0.54733634 = score(doc=189,freq=14.0), product of:
             0.33769757 = queryWeight, product of:
               2.352079 = boost
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.020715421 = queryNorm
             1.6207885 = fieldWeight in 189, product of:
               3.7416575 = tf(freq=14.0), with freq of:
                 14.0 = termFreq=14.0
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.0625 = fieldNorm(doc=189)
         0.351503 = weight(abstract_txt:hybrid in 189) [ClassicSimilarity], result of:
           0.351503 = score(doc=189,freq=3.0), product of:
             0.48085093 = queryWeight, product of:
               3.4374688 = boost
               6.7527075 = idf(docFreq=140, maxDocs=44421)
               0.020715421 = queryNorm
             0.73100203 = fieldWeight in 189, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.7527075 = idf(docFreq=140, maxDocs=44421)
               0.0625 = fieldNorm(doc=189)
       0.16 = coord(4/25)