Document (#44045)

Author

Laparra, E.
Binford-Walsh, A.
Emerson, K.
Miller, M.L.
López-Hoffman, L.
Currim, F.
Bethard, S.

Title

Addressing structural hurdles for metadata extraction from environmental impact statements

Source

Journal of the Association for Information Science and Technology. 74(2023) no.9, S.1124-1139

Year

2023

Abstract

Natural language processing techniques can be used to analyze the linguistic content of a document to extract missing pieces of metadata. However, accurate metadata extraction may not depend solely on the linguistics, but also on structural problems such as extremely large documents, unordered multi-file documents, and inconsistency in manually labeled metadata. In this work, we start from two standard machine learning solutions to extract pieces of metadata from Environmental Impact Statements, environmental policy documents that are regularly produced under the US National Environmental Policy Act of 1969. We present a series of experiments where we evaluate how these standard approaches are affected by different issues derived from real-world data. We find that metadata extraction can be strongly influenced by nonlinguistic factors such as document length and volume ordering and that the standard machine learning solutions often do not scale well to long documents. We demonstrate how such solutions can be better adapted to these scenarios, and conclude with suggestions for other NLP practitioners cataloging large document collections.

Content

Vgl.: https://asistdl.onlinelibrary.wiley.com/doi/10.1002/asi.24809.

Theme

Computerlinguistik
Metadaten

Similar documents (author)

1. Hoffman, L. López- => López-Hoffman, L.: 2.27

   2.2683184 = sum of:
     2.2683184 = product of:
       4.536637 = sum of:
         1.7922788 = weight(author_txt:lópez in 2043) [ClassicSimilarity], result of:
           1.7922788 = score(doc=2043,freq=2.0), product of:
             0.43923765 = queryWeight, product of:
               1.0780448 = boost
               7.694134 = idf(docFreq=54, maxDocs=44421)
               0.052954514 = queryNorm
             4.0804305 = fieldWeight in 2043, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.694134 = idf(docFreq=54, maxDocs=44421)
               0.375 = fieldNorm(doc=2043)
         2.744358 = weight(author_txt:hoffman in 2043) [ClassicSimilarity], result of:
           2.744358 = score(doc=2043,freq=2.0), product of:
             0.5835208 = queryWeight, product of:
               1.2425538 = boost
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.052954514 = queryNorm
             4.703102 = fieldWeight in 2043, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.375 = fieldNorm(doc=2043)
       0.5 = coord(2/4)
   

2. Hoffman, H.: LCSH online (1987) 0.81

   0.8085643 = sum of:
     0.8085643 = product of:
       3.2342572 = sum of:
         3.2342572 = weight(author_txt:hoffman in 2900) [ClassicSimilarity], result of:
           3.2342572 = score(doc=2900,freq=1.0), product of:
             0.5835208 = queryWeight, product of:
               1.2425538 = boost
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.052954514 = queryNorm
             5.5426593 = fieldWeight in 2900, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.625 = fieldNorm(doc=2900)
       0.25 = coord(1/4)
   

3. Hoffman, C.: Diverse users search FirstSearch at New York Public Library (1996) 0.81

   0.8085643 = sum of:
     0.8085643 = product of:
       3.2342572 = sum of:
         3.2342572 = weight(author_txt:hoffman in 5894) [ClassicSimilarity], result of:
           3.2342572 = score(doc=5894,freq=1.0), product of:
             0.5835208 = queryWeight, product of:
               1.2425538 = boost
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.052954514 = queryNorm
             5.5426593 = fieldWeight in 5894, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.625 = fieldNorm(doc=5894)
       0.25 = coord(1/4)
   

4. Hoffman, H.H.: Evaluation of three record types for component works in analytic online catalogs (1998) 0.81

   0.8085643 = sum of:
     0.8085643 = product of:
       3.2342572 = sum of:
         3.2342572 = weight(author_txt:hoffman in 6186) [ClassicSimilarity], result of:
           3.2342572 = score(doc=6186,freq=1.0), product of:
             0.5835208 = queryWeight, product of:
               1.2425538 = boost
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.052954514 = queryNorm
             5.5426593 = fieldWeight in 6186, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.625 = fieldNorm(doc=6186)
       0.25 = coord(1/4)
   

5. Hoffman, G.: Hebrew subject headings at Bar-Ilan University : an update (2000) 0.81

   0.8085643 = sum of:
     0.8085643 = product of:
       3.2342572 = sum of:
         3.2342572 = weight(author_txt:hoffman in 6404) [ClassicSimilarity], result of:
           3.2342572 = score(doc=6404,freq=1.0), product of:
             0.5835208 = queryWeight, product of:
               1.2425538 = boost
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.052954514 = queryNorm
             5.5426593 = fieldWeight in 6404, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.625 = fieldNorm(doc=6404)
       0.25 = coord(1/4)
   

Similar documents (content)

1. Heidorn, P.B.; Wei, Q.: Automatic metadata extraction from museum specimen labels (2008) 0.20

   0.19616811 = sum of:
     0.19616811 = product of:
       0.7006004 = sum of:
         0.06296804 = weight(abstract_txt:learning in 3624) [ClassicSimilarity], result of:
           0.06296804 = score(doc=3624,freq=4.0), product of:
             0.10622879 = queryWeight, product of:
               1.2547923 = boost
               4.7420692 = idf(docFreq=1052, maxDocs=44421)
               0.017852642 = queryNorm
             0.59275866 = fieldWeight in 3624, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.7420692 = idf(docFreq=1052, maxDocs=44421)
               0.0625 = fieldNorm(doc=3624)
         0.06128634 = weight(abstract_txt:machine in 3624) [ClassicSimilarity], result of:
           0.06128634 = score(doc=3624,freq=2.0), product of:
             0.13144617 = queryWeight, product of:
               1.3958049 = boost
               5.274979 = idf(docFreq=617, maxDocs=44421)
               0.017852642 = queryNorm
             0.4662467 = fieldWeight in 3624, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.274979 = idf(docFreq=617, maxDocs=44421)
               0.0625 = fieldNorm(doc=3624)
         0.01754587 = weight(abstract_txt:from in 3624) [ClassicSimilarity], result of:
           0.01754587 = score(doc=3624,freq=2.0), product of:
             0.07193917 = queryWeight, product of:
               1.4603214 = boost
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.017852642 = queryNorm
             0.2438987 = fieldWeight in 3624, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.0625 = fieldNorm(doc=3624)
         0.11979784 = weight(abstract_txt:extract in 3624) [ClassicSimilarity], result of:
           0.11979784 = score(doc=3624,freq=2.0), product of:
             0.20549668 = queryWeight, product of:
               1.7452319 = boost
               6.595522 = idf(docFreq=164, maxDocs=44421)
               0.017852642 = queryNorm
             0.5829673 = fieldWeight in 3624, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.595522 = idf(docFreq=164, maxDocs=44421)
               0.0625 = fieldNorm(doc=3624)
         0.078676015 = weight(abstract_txt:solutions in 3624) [ClassicSimilarity], result of:
           0.078676015 = score(doc=3624,freq=1.0), product of:
             0.22392751 = queryWeight, product of:
               2.2312596 = boost
               5.6215343 = idf(docFreq=436, maxDocs=44421)
               0.017852642 = queryNorm
             0.3513459 = fieldWeight in 3624, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6215343 = idf(docFreq=436, maxDocs=44421)
               0.0625 = fieldNorm(doc=3624)
         0.1821159 = weight(abstract_txt:extraction in 3624) [ClassicSimilarity], result of:
           0.1821159 = score(doc=3624,freq=3.0), product of:
             0.27168816 = queryWeight, product of:
               2.4577162 = boost
               6.192079 = idf(docFreq=246, maxDocs=44421)
               0.017852642 = queryNorm
             0.6703122 = fieldWeight in 3624, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.192079 = idf(docFreq=246, maxDocs=44421)
               0.0625 = fieldNorm(doc=3624)
         0.17821035 = weight(abstract_txt:metadata in 3624) [ClassicSimilarity], result of:
           0.17821035 = score(doc=3624,freq=3.0), product of:
             0.33739406 = queryWeight, product of:
               3.8732905 = boost
               4.87927 = idf(docFreq=917, maxDocs=44421)
               0.017852642 = queryNorm
             0.52819645 = fieldWeight in 3624, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.87927 = idf(docFreq=917, maxDocs=44421)
               0.0625 = fieldNorm(doc=3624)
       0.28 = coord(7/25)
   

2. Zarrad, R.; Doggaz, N.; Zagrouba, E.: Wikipedia HTML structure analysis for ontology construction (2018) 0.17

   0.1696205 = sum of:
     0.1696205 = product of:
       0.6057875 = sum of:
         0.021489214 = weight(abstract_txt:from in 302) [ClassicSimilarity], result of:
           0.021489214 = score(doc=302,freq=3.0), product of:
             0.07193917 = queryWeight, product of:
               1.4603214 = boost
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.017852642 = queryNorm
             0.29871368 = fieldWeight in 302, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.0625 = fieldNorm(doc=302)
         0.058827046 = weight(abstract_txt:structural in 302) [ClassicSimilarity], result of:
           0.058827046 = score(doc=302,freq=1.0), product of:
             0.16115119 = queryWeight, product of:
               1.5454947 = boost
               5.8406816 = idf(docFreq=350, maxDocs=44421)
               0.017852642 = queryNorm
             0.3650426 = fieldWeight in 302, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8406816 = idf(docFreq=350, maxDocs=44421)
               0.0625 = fieldNorm(doc=302)
         0.07013573 = weight(abstract_txt:document in 302) [ClassicSimilarity], result of:
           0.07013573 = score(doc=302,freq=4.0), product of:
             0.13066284 = queryWeight, product of:
               1.7044036 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.017852642 = queryNorm
             0.53676873 = fieldWeight in 302, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.0625 = fieldNorm(doc=302)
         0.16941974 = weight(abstract_txt:extract in 302) [ClassicSimilarity], result of:
           0.16941974 = score(doc=302,freq=4.0), product of:
             0.20549668 = queryWeight, product of:
               1.7452319 = boost
               6.595522 = idf(docFreq=164, maxDocs=44421)
               0.017852642 = queryNorm
             0.82444024 = fieldWeight in 302, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.595522 = idf(docFreq=164, maxDocs=44421)
               0.0625 = fieldNorm(doc=302)
         0.058542762 = weight(abstract_txt:documents in 302) [ClassicSimilarity], result of:
           0.058542762 = score(doc=302,freq=2.0), product of:
             0.16063158 = queryWeight, product of:
               2.182133 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.017852642 = queryNorm
             0.3644536 = fieldWeight in 302, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0625 = fieldNorm(doc=302)
         0.078676015 = weight(abstract_txt:solutions in 302) [ClassicSimilarity], result of:
           0.078676015 = score(doc=302,freq=1.0), product of:
             0.22392751 = queryWeight, product of:
               2.2312596 = boost
               5.6215343 = idf(docFreq=436, maxDocs=44421)
               0.017852642 = queryNorm
             0.3513459 = fieldWeight in 302, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6215343 = idf(docFreq=436, maxDocs=44421)
               0.0625 = fieldNorm(doc=302)
         0.148697 = weight(abstract_txt:extraction in 302) [ClassicSimilarity], result of:
           0.148697 = score(doc=302,freq=2.0), product of:
             0.27168816 = queryWeight, product of:
               2.4577162 = boost
               6.192079 = idf(docFreq=246, maxDocs=44421)
               0.017852642 = queryNorm
             0.5473076 = fieldWeight in 302, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.192079 = idf(docFreq=246, maxDocs=44421)
               0.0625 = fieldNorm(doc=302)
       0.28 = coord(7/25)
   

3. Liu, X.; Qin, J.: ¬An interactive metadata model for structural, descriptive, and referential representation of scholarly output (2014) 0.15

   0.15015694 = sum of:
     0.15015694 = product of:
       0.625654 = sum of:
         0.044525124 = weight(abstract_txt:learning in 2253) [ClassicSimilarity], result of:
           0.044525124 = score(doc=2253,freq=2.0), product of:
             0.10622879 = queryWeight, product of:
               1.2547923 = boost
               4.7420692 = idf(docFreq=1052, maxDocs=44421)
               0.017852642 = queryNorm
             0.41914365 = fieldWeight in 2253, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.7420692 = idf(docFreq=1052, maxDocs=44421)
               0.0625 = fieldNorm(doc=2253)
         0.017731307 = weight(abstract_txt:such in 2253) [ClassicSimilarity], result of:
           0.017731307 = score(doc=2253,freq=1.0), product of:
             0.08292899 = queryWeight, product of:
               1.357843 = boost
               3.42101 = idf(docFreq=3945, maxDocs=44421)
               0.017852642 = queryNorm
             0.21381313 = fieldWeight in 2253, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.42101 = idf(docFreq=3945, maxDocs=44421)
               0.0625 = fieldNorm(doc=2253)
         0.043335985 = weight(abstract_txt:machine in 2253) [ClassicSimilarity], result of:
           0.043335985 = score(doc=2253,freq=1.0), product of:
             0.13144617 = queryWeight, product of:
               1.3958049 = boost
               5.274979 = idf(docFreq=617, maxDocs=44421)
               0.017852642 = queryNorm
             0.3296862 = fieldWeight in 2253, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.274979 = idf(docFreq=617, maxDocs=44421)
               0.0625 = fieldNorm(doc=2253)
         0.01754587 = weight(abstract_txt:from in 2253) [ClassicSimilarity], result of:
           0.01754587 = score(doc=2253,freq=2.0), product of:
             0.07193917 = queryWeight, product of:
               1.4603214 = boost
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.017852642 = queryNorm
             0.2438987 = fieldWeight in 2253, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.0625 = fieldNorm(doc=2253)
         0.13154128 = weight(abstract_txt:structural in 2253) [ClassicSimilarity], result of:
           0.13154128 = score(doc=2253,freq=5.0), product of:
             0.16115119 = queryWeight, product of:
               1.5454947 = boost
               5.8406816 = idf(docFreq=350, maxDocs=44421)
               0.017852642 = queryNorm
             0.8162601 = fieldWeight in 2253, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               5.8406816 = idf(docFreq=350, maxDocs=44421)
               0.0625 = fieldNorm(doc=2253)
         0.37097445 = weight(abstract_txt:metadata in 2253) [ClassicSimilarity], result of:
           0.37097445 = score(doc=2253,freq=13.0), product of:
             0.33739406 = queryWeight, product of:
               3.8732905 = boost
               4.87927 = idf(docFreq=917, maxDocs=44421)
               0.017852642 = queryNorm
             1.0995287 = fieldWeight in 2253, product of:
               3.6055512 = tf(freq=13.0), with freq of:
                 13.0 = termFreq=13.0
               4.87927 = idf(docFreq=917, maxDocs=44421)
               0.0625 = fieldNorm(doc=2253)
       0.24 = coord(6/25)
   

4. Crystal, A.; Greenberg, J.: Relevance criteria identified by health information users during Web searches (2006) 0.15

   0.14998513 = sum of:
     0.14998513 = product of:
       0.6249381 = sum of:
         0.025075853 = weight(abstract_txt:such in 909) [ClassicSimilarity], result of:
           0.025075853 = score(doc=909,freq=2.0), product of:
             0.08292899 = queryWeight, product of:
               1.357843 = boost
               3.42101 = idf(docFreq=3945, maxDocs=44421)
               0.017852642 = queryNorm
             0.3023774 = fieldWeight in 909, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.42101 = idf(docFreq=3945, maxDocs=44421)
               0.0625 = fieldNorm(doc=909)
         0.012406805 = weight(abstract_txt:from in 909) [ClassicSimilarity], result of:
           0.012406805 = score(doc=909,freq=1.0), product of:
             0.07193917 = queryWeight, product of:
               1.4603214 = boost
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.017852642 = queryNorm
             0.17246243 = fieldWeight in 909, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.0625 = fieldNorm(doc=909)
         0.04959345 = weight(abstract_txt:document in 909) [ClassicSimilarity], result of:
           0.04959345 = score(doc=909,freq=2.0), product of:
             0.13066284 = queryWeight, product of:
               1.7044036 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.017852642 = queryNorm
             0.3795528 = fieldWeight in 909, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.0625 = fieldNorm(doc=909)
         0.041395985 = weight(abstract_txt:documents in 909) [ClassicSimilarity], result of:
           0.041395985 = score(doc=909,freq=1.0), product of:
             0.16063158 = queryWeight, product of:
               2.182133 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.017852642 = queryNorm
             0.25770763 = fieldWeight in 909, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0625 = fieldNorm(doc=909)
         0.35095784 = weight(abstract_txt:environmental in 909) [ClassicSimilarity], result of:
           0.35095784 = score(doc=909,freq=3.0), product of:
             0.46307895 = queryWeight, product of:
               3.705043 = boost
               7.000987 = idf(docFreq=109, maxDocs=44421)
               0.017852642 = queryNorm
             0.7578791 = fieldWeight in 909, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.000987 = idf(docFreq=109, maxDocs=44421)
               0.0625 = fieldNorm(doc=909)
         0.14550814 = weight(abstract_txt:metadata in 909) [ClassicSimilarity], result of:
           0.14550814 = score(doc=909,freq=2.0), product of:
             0.33739406 = queryWeight, product of:
               3.8732905 = boost
               4.87927 = idf(docFreq=917, maxDocs=44421)
               0.017852642 = queryNorm
             0.4312706 = fieldWeight in 909, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.87927 = idf(docFreq=917, maxDocs=44421)
               0.0625 = fieldNorm(doc=909)
       0.24 = coord(6/25)
   

5. Waltinger, U.; Mehler, A.; Lösch, M.; Horstmann, W.: Hierarchical classification of OAI metadata using the DDC taxonomy (2011) 0.15

   0.14940795 = sum of:
     0.14940795 = product of:
       0.53359985 = sum of:
         0.06630914 = weight(abstract_txt:solely in 841) [ClassicSimilarity], result of:
           0.06630914 = score(doc=841,freq=1.0), product of:
             0.13853337 = queryWeight, product of:
               1.0132414 = boost
               7.6584163 = idf(docFreq=56, maxDocs=44421)
               0.017852642 = queryNorm
             0.47865102 = fieldWeight in 841, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.6584163 = idf(docFreq=56, maxDocs=44421)
               0.0625 = fieldNorm(doc=841)
         0.03148402 = weight(abstract_txt:learning in 841) [ClassicSimilarity], result of:
           0.03148402 = score(doc=841,freq=1.0), product of:
             0.10622879 = queryWeight, product of:
               1.2547923 = boost
               4.7420692 = idf(docFreq=1052, maxDocs=44421)
               0.017852642 = queryNorm
             0.29637933 = fieldWeight in 841, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7420692 = idf(docFreq=1052, maxDocs=44421)
               0.0625 = fieldNorm(doc=841)
         0.043335985 = weight(abstract_txt:machine in 841) [ClassicSimilarity], result of:
           0.043335985 = score(doc=841,freq=1.0), product of:
             0.13144617 = queryWeight, product of:
               1.3958049 = boost
               5.274979 = idf(docFreq=617, maxDocs=44421)
               0.017852642 = queryNorm
             0.3296862 = fieldWeight in 841, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.274979 = idf(docFreq=617, maxDocs=44421)
               0.0625 = fieldNorm(doc=841)
         0.035067864 = weight(abstract_txt:document in 841) [ClassicSimilarity], result of:
           0.035067864 = score(doc=841,freq=1.0), product of:
             0.13066284 = queryWeight, product of:
               1.7044036 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.017852642 = queryNorm
             0.26838437 = fieldWeight in 841, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.0625 = fieldNorm(doc=841)
         0.046832517 = weight(abstract_txt:standard in 841) [ClassicSimilarity], result of:
           0.046832517 = score(doc=841,freq=1.0), product of:
             0.1584568 = queryWeight, product of:
               1.8769462 = boost
               4.7288613 = idf(docFreq=1066, maxDocs=44421)
               0.017852642 = queryNorm
             0.29555383 = fieldWeight in 841, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7288613 = idf(docFreq=1066, maxDocs=44421)
               0.0625 = fieldNorm(doc=841)
         0.058542762 = weight(abstract_txt:documents in 841) [ClassicSimilarity], result of:
           0.058542762 = score(doc=841,freq=2.0), product of:
             0.16063158 = queryWeight, product of:
               2.182133 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.017852642 = queryNorm
             0.3644536 = fieldWeight in 841, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0625 = fieldNorm(doc=841)
         0.2520275 = weight(abstract_txt:metadata in 841) [ClassicSimilarity], result of:
           0.2520275 = score(doc=841,freq=6.0), product of:
             0.33739406 = queryWeight, product of:
               3.8732905 = boost
               4.87927 = idf(docFreq=917, maxDocs=44421)
               0.017852642 = queryNorm
             0.74698263 = fieldWeight in 841, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.87927 = idf(docFreq=917, maxDocs=44421)
               0.0625 = fieldNorm(doc=841)
       0.28 = coord(7/25)