Document (#38722)

Author

Mengel, T.
Svensson, L.

Title

Dewey basics for mapping - Bringing Dewey mappings onto the Semantic Web

Year

2015

Abstract

What it is about to map Dewey - Things to talk about (early!) in the mapping project - Things to consider when you want to share your mappings with someone else

Content

Präsentation anlässlich der EDUG 2015, Mapping Workshop, 15 Apr 2015.

Theme

Semantische Interoperabilität

Object

DDC

Similar documents (author)

1. Mengel, A.: Thesaurusrelationen, Konsistenz, Inferenz und Interdependenz (1991) 2.25

   2.2483985 = sum of:
     2.2483985 = product of:
       4.496797 = sum of:
         4.496797 = weight(author_txt:mengel in 4710) [ClassicSimilarity], result of:
           4.496797 = score(doc=4710,freq=1.0), product of:
             0.74810666 = queryWeight, product of:
               1.0617826 = boost
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.07326021 = queryNorm
             6.010904 = fieldWeight in 4710, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.625 = fieldNorm(doc=4710)
       0.5 = coord(1/2)
   

2. Mengel, T.: Wie viel Terminologiearbeit steckt in der Übersetzung der Dewey-Dezimalklassifikation? (2019) 2.25

   2.2483985 = sum of:
     2.2483985 = product of:
       4.496797 = sum of:
         4.496797 = weight(author_txt:mengel in 5603) [ClassicSimilarity], result of:
           4.496797 = score(doc=5603,freq=1.0), product of:
             0.74810666 = queryWeight, product of:
               1.0617826 = boost
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.07326021 = queryNorm
             6.010904 = fieldWeight in 5603, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.625 = fieldNorm(doc=5603)
       0.5 = coord(1/2)
   

3. Svensson, L.G.: DDC för amatörer : Hur slutanvändare kan finna DDC-klassificerat material utan kunskap om DDC (2009) 1.88

   1.8783066 = sum of:
     1.8783066 = product of:
       3.7566133 = sum of:
         3.7566133 = weight(author_txt:svensson in 6842) [ClassicSimilarity], result of:
           3.7566133 = score(doc=6842,freq=1.0), product of:
             0.6635785 = queryWeight, product of:
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.07326021 = queryNorm
             5.661144 = fieldWeight in 6842, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.625 = fieldNorm(doc=6842)
       0.5 = coord(1/2)
   

4. Svensson, L.G.: Sacherschließung als Basis für intelligente Navigation ausgehend von der DDC : Konzepte - Realisierung - Visionen (2004) 1.88

   1.8783066 = sum of:
     1.8783066 = product of:
       3.7566133 = sum of:
         3.7566133 = weight(author_txt:svensson in 2876) [ClassicSimilarity], result of:
           3.7566133 = score(doc=2876,freq=1.0), product of:
             0.6635785 = queryWeight, product of:
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.07326021 = queryNorm
             5.661144 = fieldWeight in 2876, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.625 = fieldNorm(doc=2876)
       0.5 = coord(1/2)
   

5. Svensson, L.G.: Integrating browsing over DDC notations in library portals (2007) 1.88

   1.8783066 = sum of:
     1.8783066 = product of:
       3.7566133 = sum of:
         3.7566133 = weight(author_txt:svensson in 111) [ClassicSimilarity], result of:
           3.7566133 = score(doc=111,freq=1.0), product of:
             0.6635785 = queryWeight, product of:
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.07326021 = queryNorm
             5.661144 = fieldWeight in 111, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.625 = fieldNorm(doc=111)
       0.5 = coord(1/2)
   

Similar documents (content)

1. Rice, R.: Putting sample indexes on your Web site (2000) 0.27

   0.27173162 = sum of:
     0.27173162 = product of:
       0.81519485 = sum of:
         0.0033338247 = weight(abstract_txt:with in 226) [ClassicSimilarity], result of:
           0.0033338247 = score(doc=226,freq=1.0), product of:
             0.024387145 = queryWeight, product of:
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.009755898 = queryNorm
             0.13670418 = fieldWeight in 226, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.0546875 = fieldNorm(doc=226)
         0.017144803 = weight(abstract_txt:what in 226) [ClassicSimilarity], result of:
           0.017144803 = score(doc=226,freq=1.0), product of:
             0.07265867 = queryWeight, product of:
               1.7260892 = boost
               4.314763 = idf(docFreq=1606, maxDocs=44218)
               0.009755898 = queryNorm
             0.23596361 = fieldWeight in 226, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.314763 = idf(docFreq=1606, maxDocs=44218)
               0.0546875 = fieldNorm(doc=226)
         0.031027947 = weight(abstract_txt:project in 226) [ClassicSimilarity], result of:
           0.031027947 = score(doc=226,freq=3.0), product of:
             0.07481593 = queryWeight, product of:
               1.7515259 = boost
               4.378348 = idf(docFreq=1507, maxDocs=44218)
               0.009755898 = queryNorm
             0.4147238 = fieldWeight in 226, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.378348 = idf(docFreq=1507, maxDocs=44218)
               0.0546875 = fieldNorm(doc=226)
         0.4917289 = weight(title_txt:your in 226) [ClassicSimilarity], result of:
           0.4917289 = score(doc=226,freq=1.0), product of:
             0.1886199 = queryWeight, product of:
               2.7810786 = boost
               6.9519553 = idf(docFreq=114, maxDocs=44218)
               0.009755898 = queryNorm
             2.6069832 = fieldWeight in 226, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.9519553 = idf(docFreq=114, maxDocs=44218)
               0.375 = fieldNorm(doc=226)
         0.036396597 = weight(abstract_txt:about in 226) [ClassicSimilarity], result of:
           0.036396597 = score(doc=226,freq=2.0), product of:
             0.12001614 = queryWeight, product of:
               3.1372876 = boost
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.009755898 = queryNorm
             0.30326417 = fieldWeight in 226, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.0546875 = fieldNorm(doc=226)
         0.110649034 = weight(abstract_txt:someone in 226) [ClassicSimilarity], result of:
           0.110649034 = score(doc=226,freq=1.0), product of:
             0.2518629 = queryWeight, product of:
               3.2136726 = boost
               8.033325 = idf(docFreq=38, maxDocs=44218)
               0.009755898 = queryNorm
             0.43932247 = fieldWeight in 226, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.033325 = idf(docFreq=38, maxDocs=44218)
               0.0546875 = fieldNorm(doc=226)
         0.1249137 = weight(abstract_txt:else in 226) [ClassicSimilarity], result of:
           0.1249137 = score(doc=226,freq=1.0), product of:
             0.27306908 = queryWeight, product of:
               3.34623 = boost
               8.364683 = idf(docFreq=27, maxDocs=44218)
               0.009755898 = queryNorm
             0.4574436 = fieldWeight in 226, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.364683 = idf(docFreq=27, maxDocs=44218)
               0.0546875 = fieldNorm(doc=226)
       0.33333334 = coord(7/21)
   

2. EDUG's recommendations for best practice in mapping involving Dewey Decimal Classification (DDC) (2015) 0.17

   0.17005901 = sum of:
     0.17005901 = product of:
       0.7142478 = sum of:
         0.008249076 = weight(abstract_txt:with in 2113) [ClassicSimilarity], result of:
           0.008249076 = score(doc=2113,freq=3.0), product of:
             0.024387145 = queryWeight, product of:
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.009755898 = queryNorm
             0.3382551 = fieldWeight in 2113, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.078125 = fieldNorm(doc=2113)
         0.025591418 = weight(abstract_txt:project in 2113) [ClassicSimilarity], result of:
           0.025591418 = score(doc=2113,freq=1.0), product of:
             0.07481593 = queryWeight, product of:
               1.7515259 = boost
               4.378348 = idf(docFreq=1507, maxDocs=44218)
               0.009755898 = queryNorm
             0.34205842 = fieldWeight in 2113, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.378348 = idf(docFreq=1507, maxDocs=44218)
               0.078125 = fieldNorm(doc=2113)
         0.26303267 = weight(abstract_txt:mapping in 2113) [ClassicSimilarity], result of:
           0.26303267 = score(doc=2113,freq=5.0), product of:
             0.26058993 = queryWeight, product of:
               4.6228876 = boost
               5.777993 = idf(docFreq=371, maxDocs=44218)
               0.009755898 = queryNorm
             1.0093739 = fieldWeight in 2113, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               5.777993 = idf(docFreq=371, maxDocs=44218)
               0.078125 = fieldNorm(doc=2113)
         0.2339335 = weight(abstract_txt:mappings in 2113) [ClassicSimilarity], result of:
           0.2339335 = score(doc=2113,freq=1.0), product of:
             0.41210014 = queryWeight, product of:
               5.813476 = boost
               7.2660704 = idf(docFreq=83, maxDocs=44218)
               0.009755898 = queryNorm
             0.56766176 = fieldWeight in 2113, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.2660704 = idf(docFreq=83, maxDocs=44218)
               0.078125 = fieldNorm(doc=2113)
         0.18344115 = weight(abstract_txt:dewey in 2113) [ClassicSimilarity], result of:
           0.18344115 = score(doc=2113,freq=1.0), product of:
             0.40114626 = queryWeight, product of:
               7.0247602 = boost
               5.853343 = idf(docFreq=344, maxDocs=44218)
               0.009755898 = queryNorm
             0.45729244 = fieldWeight in 2113, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.853343 = idf(docFreq=344, maxDocs=44218)
               0.078125 = fieldNorm(doc=2113)
       0.23809524 = coord(5/21)
   

3. Hammond, T.; Hannay, T.; Lund, B.; Scott, J.: Social bookmarking tools (I) : a general review (2005) 0.17

   0.16770184 = sum of:
     0.16770184 = product of:
       0.39130428 = sum of:
         0.005832978 = weight(abstract_txt:with in 1188) [ClassicSimilarity], result of:
           0.005832978 = score(doc=1188,freq=6.0), product of:
             0.024387145 = queryWeight, product of:
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.009755898 = queryNorm
             0.23918249 = fieldWeight in 1188, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1188)
         0.010883132 = weight(abstract_txt:when in 1188) [ClassicSimilarity], result of:
           0.010883132 = score(doc=1188,freq=1.0), product of:
             0.06716151 = queryWeight, product of:
               1.6595094 = boost
               4.148331 = idf(docFreq=1897, maxDocs=44218)
               0.009755898 = queryNorm
             0.16204418 = fieldWeight in 1188, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.148331 = idf(docFreq=1897, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1188)
         0.0122462865 = weight(abstract_txt:what in 1188) [ClassicSimilarity], result of:
           0.0122462865 = score(doc=1188,freq=1.0), product of:
             0.07265867 = queryWeight, product of:
               1.7260892 = boost
               4.314763 = idf(docFreq=1606, maxDocs=44218)
               0.009755898 = queryNorm
             0.16854542 = fieldWeight in 1188, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.314763 = idf(docFreq=1606, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1188)
         0.02640746 = weight(abstract_txt:early in 1188) [ClassicSimilarity], result of:
           0.02640746 = score(doc=1188,freq=1.0), product of:
             0.12127434 = queryWeight, product of:
               2.2299955 = boost
               5.574394 = idf(docFreq=455, maxDocs=44218)
               0.009755898 = queryNorm
             0.21774977 = fieldWeight in 1188, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.574394 = idf(docFreq=455, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1188)
         0.061262768 = weight(abstract_txt:onto in 1188) [ClassicSimilarity], result of:
           0.061262768 = score(doc=1188,freq=1.0), product of:
             0.21252772 = queryWeight, product of:
               2.9520745 = boost
               7.3793993 = idf(docFreq=74, maxDocs=44218)
               0.009755898 = queryNorm
             0.28825778 = fieldWeight in 1188, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.3793993 = idf(docFreq=74, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1188)
         0.018383058 = weight(abstract_txt:about in 1188) [ClassicSimilarity], result of:
           0.018383058 = score(doc=1188,freq=1.0), product of:
             0.12001614 = queryWeight, product of:
               3.1372876 = boost
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.009755898 = queryNorm
             0.15317154 = fieldWeight in 1188, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1188)
         0.07903503 = weight(abstract_txt:someone in 1188) [ClassicSimilarity], result of:
           0.07903503 = score(doc=1188,freq=1.0), product of:
             0.2518629 = queryWeight, product of:
               3.2136726 = boost
               8.033325 = idf(docFreq=38, maxDocs=44218)
               0.009755898 = queryNorm
             0.31380177 = fieldWeight in 1188, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.033325 = idf(docFreq=38, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1188)
         0.08922408 = weight(abstract_txt:else in 1188) [ClassicSimilarity], result of:
           0.08922408 = score(doc=1188,freq=1.0), product of:
             0.27306908 = queryWeight, product of:
               3.34623 = boost
               8.364683 = idf(docFreq=27, maxDocs=44218)
               0.009755898 = queryNorm
             0.32674545 = fieldWeight in 1188, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.364683 = idf(docFreq=27, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1188)
         0.0880295 = weight(abstract_txt:things in 1188) [ClassicSimilarity], result of:
           0.0880295 = score(doc=1188,freq=1.0), product of:
             0.34096774 = queryWeight, product of:
               5.287997 = boost
               6.609291 = idf(docFreq=161, maxDocs=44218)
               0.009755898 = queryNorm
             0.25817543 = fieldWeight in 1188, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.609291 = idf(docFreq=161, maxDocs=44218)
               0.0390625 = fieldNorm(doc=1188)
       0.42857143 = coord(9/21)
   

4. Kelley, D.: Relevance feedback : getting to know your user (2008) 0.16

   0.16258734 = sum of:
     0.16258734 = product of:
       0.6828669 = sum of:
         0.006599261 = weight(abstract_txt:with in 1924) [ClassicSimilarity], result of:
           0.006599261 = score(doc=1924,freq=3.0), product of:
             0.024387145 = queryWeight, product of:
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.009755898 = queryNorm
             0.27060407 = fieldWeight in 1924, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.0625 = fieldNorm(doc=1924)
         0.033937905 = weight(abstract_txt:what in 1924) [ClassicSimilarity], result of:
           0.033937905 = score(doc=1924,freq=3.0), product of:
             0.07265867 = queryWeight, product of:
               1.7260892 = boost
               4.314763 = idf(docFreq=1606, maxDocs=44218)
               0.009755898 = queryNorm
             0.4670868 = fieldWeight in 1924, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.314763 = idf(docFreq=1606, maxDocs=44218)
               0.0625 = fieldNorm(doc=1924)
         0.4917289 = weight(title_txt:your in 1924) [ClassicSimilarity], result of:
           0.4917289 = score(doc=1924,freq=1.0), product of:
             0.1886199 = queryWeight, product of:
               2.7810786 = boost
               6.9519553 = idf(docFreq=114, maxDocs=44218)
               0.009755898 = queryNorm
             2.6069832 = fieldWeight in 1924, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.9519553 = idf(docFreq=114, maxDocs=44218)
               0.375 = fieldNorm(doc=1924)
         0.09965616 = weight(abstract_txt:talk in 1924) [ClassicSimilarity], result of:
           0.09965616 = score(doc=1924,freq=1.0), product of:
             0.21488558 = queryWeight, product of:
               2.968405 = boost
               7.4202213 = idf(docFreq=71, maxDocs=44218)
               0.009755898 = queryNorm
             0.46376383 = fieldWeight in 1924, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.4202213 = idf(docFreq=71, maxDocs=44218)
               0.0625 = fieldNorm(doc=1924)
         0.050944623 = weight(abstract_txt:about in 1924) [ClassicSimilarity], result of:
           0.050944623 = score(doc=1924,freq=3.0), product of:
             0.12001614 = queryWeight, product of:
               3.1372876 = boost
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.009755898 = queryNorm
             0.42448142 = fieldWeight in 1924, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.0625 = fieldNorm(doc=1924)
       0.23809524 = coord(5/21)
   

5. Ackermann, E.: Piaget's constructivism, Papert's constructionism : what's the difference? (2001) 0.15

   0.15462303 = sum of:
     0.15462303 = product of:
       0.5411806 = sum of:
         0.0053882743 = weight(abstract_txt:with in 692) [ClassicSimilarity], result of:
           0.0053882743 = score(doc=692,freq=2.0), product of:
             0.024387145 = queryWeight, product of:
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.009755898 = queryNorm
             0.22094731 = fieldWeight in 692, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.0625 = fieldNorm(doc=692)
         0.027710184 = weight(abstract_txt:what in 692) [ClassicSimilarity], result of:
           0.027710184 = score(doc=692,freq=2.0), product of:
             0.07265867 = queryWeight, product of:
               1.7260892 = boost
               4.314763 = idf(docFreq=1606, maxDocs=44218)
               0.009755898 = queryNorm
             0.38137478 = fieldWeight in 692, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.314763 = idf(docFreq=1606, maxDocs=44218)
               0.0625 = fieldNorm(doc=692)
         0.098020434 = weight(abstract_txt:onto in 692) [ClassicSimilarity], result of:
           0.098020434 = score(doc=692,freq=1.0), product of:
             0.21252772 = queryWeight, product of:
               2.9520745 = boost
               7.3793993 = idf(docFreq=74, maxDocs=44218)
               0.009755898 = queryNorm
             0.46121246 = fieldWeight in 692, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.3793993 = idf(docFreq=74, maxDocs=44218)
               0.0625 = fieldNorm(doc=692)
         0.12645604 = weight(abstract_txt:someone in 692) [ClassicSimilarity], result of:
           0.12645604 = score(doc=692,freq=1.0), product of:
             0.2518629 = queryWeight, product of:
               3.2136726 = boost
               8.033325 = idf(docFreq=38, maxDocs=44218)
               0.009755898 = queryNorm
             0.5020828 = fieldWeight in 692, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.033325 = idf(docFreq=38, maxDocs=44218)
               0.0625 = fieldNorm(doc=692)
         0.14275852 = weight(abstract_txt:else in 692) [ClassicSimilarity], result of:
           0.14275852 = score(doc=692,freq=1.0), product of:
             0.27306908 = queryWeight, product of:
               3.34623 = boost
               8.364683 = idf(docFreq=27, maxDocs=44218)
               0.009755898 = queryNorm
             0.5227927 = fieldWeight in 692, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.364683 = idf(docFreq=27, maxDocs=44218)
               0.0625 = fieldNorm(doc=692)
         0.14084719 = weight(abstract_txt:things in 692) [ClassicSimilarity], result of:
           0.14084719 = score(doc=692,freq=1.0), product of:
             0.34096774 = queryWeight, product of:
               5.287997 = boost
               6.609291 = idf(docFreq=161, maxDocs=44218)
               0.009755898 = queryNorm
             0.4130807 = fieldWeight in 692, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.609291 = idf(docFreq=161, maxDocs=44218)
               0.0625 = fieldNorm(doc=692)
       0.2857143 = coord(6/21)