Document (#5095)

Author
Agosti, M.
Colotti, R.
Gradenigo, G.
Title
Issues of data modelling in information retrieval
Source
Electronic publishing. 4(1991) no.4, S.219-237
Year
1991
Abstract
Addresses the problem of data modelling in information retrieval introducing various aspects and issues that are necessarily taken into account when designing and developing an information retrieval system. Pays particular attention to the representation of different types of data managed by an information retrieval application: structured and unstructured data. A recently introduced information retrieval, data modelling approach supports the notion of a schema permitting representation of the information retrieval data on 2 different levels: intensional and extensional. presents the characteristics of this data modelling approach here together with examples of its use in a working prototype

Similar documents (author)

  1. Agosti, M.: Hypertext and information retrieval (1993) 5.80
    5.798094 = sum of:
      5.798094 = weight(author_txt:agosti in 4708) [ClassicSimilarity], result of:
        5.798094 = fieldWeight in 4708, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.27695 = idf(docFreq=10, maxDocs=43254)
          0.625 = fieldNorm(doc=4708)
    
  2. Agosti, M.; Allan, J.: Introduction to the special issue on methods and tools for the automatic construction of hypertext (1997) 4.64
    4.638475 = sum of:
      4.638475 = weight(author_txt:agosti in 2150) [ClassicSimilarity], result of:
        4.638475 = fieldWeight in 2150, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.27695 = idf(docFreq=10, maxDocs=43254)
          0.5 = fieldNorm(doc=2150)
    
  3. Agosti, M.; Smeaton, A.F.: Information retrieval and hypertext (1996) 4.64
    4.638475 = sum of:
      4.638475 = weight(author_txt:agosti in 2498) [ClassicSimilarity], result of:
        4.638475 = fieldWeight in 2498, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.27695 = idf(docFreq=10, maxDocs=43254)
          0.5 = fieldNorm(doc=2498)
    
  4. Agosti, M.; Melucci, M.: Information retrieval techniques for the automatic construction of hypertext (2000) 4.64
    4.638475 = sum of:
      4.638475 = weight(author_txt:agosti in 6672) [ClassicSimilarity], result of:
        4.638475 = fieldWeight in 6672, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.27695 = idf(docFreq=10, maxDocs=43254)
          0.5 = fieldNorm(doc=6672)
    
  5. Agosti, M.; Pretto, L.: ¬A theoretical study of a generalized version of kleinberg's HITS algorithm (2005) 4.64
    4.638475 = sum of:
      4.638475 = weight(author_txt:agosti in 2005) [ClassicSimilarity], result of:
        4.638475 = fieldWeight in 2005, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.27695 = idf(docFreq=10, maxDocs=43254)
          0.5 = fieldNorm(doc=2005)
    

Similar documents (content)

  1. Mehrotra, R.: Content-based image modeling and retrieval (1997) 0.24
    0.23781142 = sum of:
      0.23781142 = product of:
        0.8493265 = sum of:
          0.11033442 = weight(abstract_txt:unstructured in 1762) [ClassicSimilarity], result of:
            0.11033442 = score(doc=1762,freq=1.0), product of:
              0.16428015 = queryWeight, product of:
                1.2968267 = boost
                7.1639853 = idf(docFreq=90, maxDocs=43254)
                0.017682696 = queryNorm
              0.6716236 = fieldWeight in 1762, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.1639853 = idf(docFreq=90, maxDocs=43254)
                0.09375 = fieldNorm(doc=1762)
          0.031798203 = weight(abstract_txt:approach in 1762) [ClassicSimilarity], result of:
            0.031798203 = score(doc=1762,freq=1.0), product of:
              0.09030729 = queryWeight, product of:
                1.359771 = boost
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.017682696 = queryNorm
              0.35211116 = fieldWeight in 1762, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.09375 = fieldNorm(doc=1762)
          0.047977094 = weight(abstract_txt:issues in 1762) [ClassicSimilarity], result of:
            0.047977094 = score(doc=1762,freq=1.0), product of:
              0.11879834 = queryWeight, product of:
                1.5595869 = boost
                4.307768 = idf(docFreq=1582, maxDocs=43254)
                0.017682696 = queryNorm
              0.40385324 = fieldWeight in 1762, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.307768 = idf(docFreq=1582, maxDocs=43254)
                0.09375 = fieldNorm(doc=1762)
          0.044578478 = weight(abstract_txt:information in 1762) [ClassicSimilarity], result of:
            0.044578478 = score(doc=1762,freq=3.0), product of:
              0.11311961 = queryWeight, product of:
                2.6359305 = boost
                2.42692 = idf(docFreq=10382, maxDocs=43254)
                0.017682696 = queryNorm
              0.39408267 = fieldWeight in 1762, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.42692 = idf(docFreq=10382, maxDocs=43254)
                0.09375 = fieldNorm(doc=1762)
          0.10638101 = weight(abstract_txt:retrieval in 1762) [ClassicSimilarity], result of:
            0.10638101 = score(doc=1762,freq=2.0), product of:
              0.23123889 = queryWeight, product of:
                3.7687337 = boost
                3.4699 = idf(docFreq=3658, maxDocs=43254)
                0.017682696 = queryNorm
              0.46004808 = fieldWeight in 1762, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.4699 = idf(docFreq=3658, maxDocs=43254)
                0.09375 = fieldNorm(doc=1762)
          0.15922754 = weight(abstract_txt:data in 1762) [ClassicSimilarity], result of:
            0.15922754 = score(doc=1762,freq=4.0), product of:
              0.2528148 = queryWeight, product of:
                4.256373 = boost
                3.3590338 = idf(docFreq=4087, maxDocs=43254)
                0.017682696 = queryNorm
              0.62981886 = fieldWeight in 1762, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.3590338 = idf(docFreq=4087, maxDocs=43254)
                0.09375 = fieldNorm(doc=1762)
          0.3490298 = weight(abstract_txt:modelling in 1762) [ClassicSimilarity], result of:
            0.3490298 = score(doc=1762,freq=1.0), product of:
              0.5619609 = queryWeight, product of:
                4.79703 = boost
                6.624989 = idf(docFreq=155, maxDocs=43254)
                0.017682696 = queryNorm
              0.62109274 = fieldWeight in 1762, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.624989 = idf(docFreq=155, maxDocs=43254)
                0.09375 = fieldNorm(doc=1762)
        0.28 = coord(7/25)
    
  2. Hurtado, M.V.; Garcia, L.; Parets, J.: Semantic views over heterogeneous and distributed data repositories : integration of information system based on ontologies; (2003) 0.21
    0.21246572 = sum of:
      0.21246572 = product of:
        0.59018254 = sum of:
          0.029510869 = weight(abstract_txt:here in 4739) [ClassicSimilarity], result of:
            0.029510869 = score(doc=4739,freq=1.0), product of:
              0.0976835 = queryWeight, product of:
                5.5242424 = idf(docFreq=468, maxDocs=43254)
                0.017682696 = queryNorm
              0.302107 = fieldWeight in 4739, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5242424 = idf(docFreq=468, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4739)
          0.06690471 = weight(abstract_txt:schema in 4739) [ClassicSimilarity], result of:
            0.06690471 = score(doc=4739,freq=2.0), product of:
              0.1338015 = queryWeight, product of:
                1.1703612 = boost
                6.4653587 = idf(docFreq=182, maxDocs=43254)
                0.017682696 = queryNorm
              0.50002956 = fieldWeight in 4739, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.4653587 = idf(docFreq=182, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4739)
          0.030275417 = weight(abstract_txt:different in 4739) [ClassicSimilarity], result of:
            0.030275417 = score(doc=4739,freq=3.0), product of:
              0.08680196 = queryWeight, product of:
                1.3331198 = boost
                3.6822383 = idf(docFreq=2958, maxDocs=43254)
                0.017682696 = queryNorm
              0.34878725 = fieldWeight in 4739, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.6822383 = idf(docFreq=2958, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4739)
          0.018548952 = weight(abstract_txt:approach in 4739) [ClassicSimilarity], result of:
            0.018548952 = score(doc=4739,freq=1.0), product of:
              0.09030729 = queryWeight, product of:
                1.359771 = boost
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.017682696 = queryNorm
              0.20539819 = fieldWeight in 4739, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4739)
          0.060044713 = weight(abstract_txt:representation in 4739) [ClassicSimilarity], result of:
            0.060044713 = score(doc=4739,freq=2.0), product of:
              0.15684947 = queryWeight, product of:
                1.7920327 = boost
                4.9498115 = idf(docFreq=832, maxDocs=43254)
                0.017682696 = queryNorm
              0.38281745 = fieldWeight in 4739, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.9498115 = idf(docFreq=832, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4739)
          0.033571165 = weight(abstract_txt:information in 4739) [ClassicSimilarity], result of:
            0.033571165 = score(doc=4739,freq=5.0), product of:
              0.11311961 = queryWeight, product of:
                2.6359305 = boost
                2.42692 = idf(docFreq=10382, maxDocs=43254)
                0.017682696 = queryNorm
              0.29677582 = fieldWeight in 4739, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                2.42692 = idf(docFreq=10382, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4739)
          0.043879926 = weight(abstract_txt:retrieval in 4739) [ClassicSimilarity], result of:
            0.043879926 = score(doc=4739,freq=1.0), product of:
              0.23123889 = queryWeight, product of:
                3.7687337 = boost
                3.4699 = idf(docFreq=3658, maxDocs=43254)
                0.017682696 = queryNorm
              0.18976015 = fieldWeight in 4739, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4699 = idf(docFreq=3658, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4739)
          0.10384604 = weight(abstract_txt:data in 4739) [ClassicSimilarity], result of:
            0.10384604 = score(doc=4739,freq=5.0), product of:
              0.2528148 = queryWeight, product of:
                4.256373 = boost
                3.3590338 = idf(docFreq=4087, maxDocs=43254)
                0.017682696 = queryNorm
              0.41075936 = fieldWeight in 4739, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                3.3590338 = idf(docFreq=4087, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4739)
          0.20360072 = weight(abstract_txt:modelling in 4739) [ClassicSimilarity], result of:
            0.20360072 = score(doc=4739,freq=1.0), product of:
              0.5619609 = queryWeight, product of:
                4.79703 = boost
                6.624989 = idf(docFreq=155, maxDocs=43254)
                0.017682696 = queryNorm
              0.3623041 = fieldWeight in 4739, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.624989 = idf(docFreq=155, maxDocs=43254)
                0.0546875 = fieldNorm(doc=4739)
        0.36 = coord(9/25)
    
  3. Stojanovic, N.: Ontology-based Information Retrieval : methods and tools for cooperative query answering (2005) 0.19
    0.18614902 = sum of:
      0.18614902 = product of:
        0.5817157 = sum of:
          0.0331216 = weight(abstract_txt:notion in 2166) [ClassicSimilarity], result of:
            0.0331216 = score(doc=2166,freq=1.0), product of:
              0.11691546 = queryWeight, product of:
                1.0940202 = boost
                6.043633 = idf(docFreq=278, maxDocs=43254)
                0.017682696 = queryNorm
              0.2832953 = fieldWeight in 2166, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.043633 = idf(docFreq=278, maxDocs=43254)
                0.046875 = fieldNorm(doc=2166)
          0.054421294 = weight(abstract_txt:managed in 2166) [ClassicSimilarity], result of:
            0.054421294 = score(doc=2166,freq=1.0), product of:
              0.16279596 = queryWeight, product of:
                1.2909553 = boost
                7.1315503 = idf(docFreq=93, maxDocs=43254)
                0.017682696 = queryNorm
              0.33429143 = fieldWeight in 2166, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.1315503 = idf(docFreq=93, maxDocs=43254)
                0.046875 = fieldNorm(doc=2166)
          0.014982445 = weight(abstract_txt:different in 2166) [ClassicSimilarity], result of:
            0.014982445 = score(doc=2166,freq=1.0), product of:
              0.08680196 = queryWeight, product of:
                1.3331198 = boost
                3.6822383 = idf(docFreq=2958, maxDocs=43254)
                0.017682696 = queryNorm
              0.17260492 = fieldWeight in 2166, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.6822383 = idf(docFreq=2958, maxDocs=43254)
                0.046875 = fieldNorm(doc=2166)
          0.023988547 = weight(abstract_txt:issues in 2166) [ClassicSimilarity], result of:
            0.023988547 = score(doc=2166,freq=1.0), product of:
              0.11879834 = queryWeight, product of:
                1.5595869 = boost
                4.307768 = idf(docFreq=1582, maxDocs=43254)
                0.017682696 = queryNorm
              0.20192662 = fieldWeight in 2166, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.307768 = idf(docFreq=1582, maxDocs=43254)
                0.046875 = fieldNorm(doc=2166)
          0.036392592 = weight(abstract_txt:representation in 2166) [ClassicSimilarity], result of:
            0.036392592 = score(doc=2166,freq=1.0), product of:
              0.15684947 = queryWeight, product of:
                1.7920327 = boost
                4.9498115 = idf(docFreq=832, maxDocs=43254)
                0.017682696 = queryNorm
              0.2320224 = fieldWeight in 2166, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9498115 = idf(docFreq=832, maxDocs=43254)
                0.046875 = fieldNorm(doc=2166)
          0.036398176 = weight(abstract_txt:information in 2166) [ClassicSimilarity], result of:
            0.036398176 = score(doc=2166,freq=8.0), product of:
              0.11311961 = queryWeight, product of:
                2.6359305 = boost
                2.42692 = idf(docFreq=10382, maxDocs=43254)
                0.017682696 = queryNorm
              0.32176715 = fieldWeight in 2166, product of:
                2.828427 = tf(freq=8.0), with freq of:
                  8.0 = termFreq=8.0
                2.42692 = idf(docFreq=10382, maxDocs=43254)
                0.046875 = fieldNorm(doc=2166)
          0.1356097 = weight(abstract_txt:retrieval in 2166) [ClassicSimilarity], result of:
            0.1356097 = score(doc=2166,freq=13.0), product of:
              0.23123889 = queryWeight, product of:
                3.7687337 = boost
                3.4699 = idf(docFreq=3658, maxDocs=43254)
                0.017682696 = queryNorm
              0.5864485 = fieldWeight in 2166, product of:
                3.6055512 = tf(freq=13.0), with freq of:
                  13.0 = termFreq=13.0
                3.4699 = idf(docFreq=3658, maxDocs=43254)
                0.046875 = fieldNorm(doc=2166)
          0.24680135 = weight(abstract_txt:modelling in 2166) [ClassicSimilarity], result of:
            0.24680135 = score(doc=2166,freq=2.0), product of:
              0.5619609 = queryWeight, product of:
                4.79703 = boost
                6.624989 = idf(docFreq=155, maxDocs=43254)
                0.017682696 = queryNorm
              0.43917888 = fieldWeight in 2166, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.624989 = idf(docFreq=155, maxDocs=43254)
                0.046875 = fieldNorm(doc=2166)
        0.32 = coord(8/25)
    
  4. Johannesson, P.: Schema standardization as an aid in view integration (1994) 0.18
    0.17781858 = sum of:
      0.17781858 = product of:
        0.88909286 = sum of:
          0.07728373 = weight(abstract_txt:notion in 1755) [ClassicSimilarity], result of:
            0.07728373 = score(doc=1755,freq=1.0), product of:
              0.11691546 = queryWeight, product of:
                1.0940202 = boost
                6.043633 = idf(docFreq=278, maxDocs=43254)
                0.017682696 = queryNorm
              0.66102237 = fieldWeight in 1755, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.043633 = idf(docFreq=278, maxDocs=43254)
                0.109375 = fieldNorm(doc=1755)
          0.16388239 = weight(abstract_txt:schema in 1755) [ClassicSimilarity], result of:
            0.16388239 = score(doc=1755,freq=3.0), product of:
              0.1338015 = queryWeight, product of:
                1.1703612 = boost
                6.4653587 = idf(docFreq=182, maxDocs=43254)
                0.017682696 = queryNorm
              1.2248173 = fieldWeight in 1755, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.4653587 = idf(docFreq=182, maxDocs=43254)
                0.109375 = fieldNorm(doc=1755)
          0.03495904 = weight(abstract_txt:different in 1755) [ClassicSimilarity], result of:
            0.03495904 = score(doc=1755,freq=1.0), product of:
              0.08680196 = queryWeight, product of:
                1.3331198 = boost
                3.6822383 = idf(docFreq=2958, maxDocs=43254)
                0.017682696 = queryNorm
              0.40274483 = fieldWeight in 1755, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.6822383 = idf(docFreq=2958, maxDocs=43254)
                0.109375 = fieldNorm(doc=1755)
          0.037097905 = weight(abstract_txt:approach in 1755) [ClassicSimilarity], result of:
            0.037097905 = score(doc=1755,freq=1.0), product of:
              0.09030729 = queryWeight, product of:
                1.359771 = boost
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.017682696 = queryNorm
              0.41079637 = fieldWeight in 1755, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.109375 = fieldNorm(doc=1755)
          0.5758698 = weight(abstract_txt:modelling in 1755) [ClassicSimilarity], result of:
            0.5758698 = score(doc=1755,freq=2.0), product of:
              0.5619609 = queryWeight, product of:
                4.79703 = boost
                6.624989 = idf(docFreq=155, maxDocs=43254)
                0.017682696 = queryNorm
              1.0247507 = fieldWeight in 1755, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.624989 = idf(docFreq=155, maxDocs=43254)
                0.109375 = fieldNorm(doc=1755)
        0.2 = coord(5/25)
    
  5. Maurer, H.: Object-oriented modelling of hyperstructure : overcoming the static link deficiency (1994) 0.17
    0.17472143 = sum of:
      0.17472143 = product of:
        0.87360716 = sum of:
          0.055202663 = weight(abstract_txt:notion in 1833) [ClassicSimilarity], result of:
            0.055202663 = score(doc=1833,freq=1.0), product of:
              0.11691546 = queryWeight, product of:
                1.0940202 = boost
                6.043633 = idf(docFreq=278, maxDocs=43254)
                0.017682696 = queryNorm
              0.47215882 = fieldWeight in 1833, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.043633 = idf(docFreq=278, maxDocs=43254)
                0.078125 = fieldNorm(doc=1833)
          0.06183811 = weight(abstract_txt:supports in 1833) [ClassicSimilarity], result of:
            0.06183811 = score(doc=1833,freq=1.0), product of:
              0.12610608 = queryWeight, product of:
                1.1362069 = boost
                6.2766824 = idf(docFreq=220, maxDocs=43254)
                0.017682696 = queryNorm
              0.4903658 = fieldWeight in 1833, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.2766824 = idf(docFreq=220, maxDocs=43254)
                0.078125 = fieldNorm(doc=1833)
          0.026498504 = weight(abstract_txt:approach in 1833) [ClassicSimilarity], result of:
            0.026498504 = score(doc=1833,freq=1.0), product of:
              0.09030729 = queryWeight, product of:
                1.359771 = boost
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.017682696 = queryNorm
              0.29342598 = fieldWeight in 1833, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.078125 = fieldNorm(doc=1833)
          0.14835149 = weight(abstract_txt:data in 1833) [ClassicSimilarity], result of:
            0.14835149 = score(doc=1833,freq=5.0), product of:
              0.2528148 = queryWeight, product of:
                4.256373 = boost
                3.3590338 = idf(docFreq=4087, maxDocs=43254)
                0.017682696 = queryNorm
              0.5867991 = fieldWeight in 1833, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                3.3590338 = idf(docFreq=4087, maxDocs=43254)
                0.078125 = fieldNorm(doc=1833)
          0.58171636 = weight(abstract_txt:modelling in 1833) [ClassicSimilarity], result of:
            0.58171636 = score(doc=1833,freq=4.0), product of:
              0.5619609 = queryWeight, product of:
                4.79703 = boost
                6.624989 = idf(docFreq=155, maxDocs=43254)
                0.017682696 = queryNorm
              1.0351546 = fieldWeight in 1833, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                6.624989 = idf(docFreq=155, maxDocs=43254)
                0.078125 = fieldNorm(doc=1833)
        0.2 = coord(5/25)