Abstract
The paper presents two experiments related to enhancing the content of a digital library with data from external repositories. The concept involves three related resources: a digital library of Middle Polish prints where items are stored in image form, the same items in textual form in a linguistically annotated corpus, and a dictionary of Middle Polish. The first experiment demonstrates how the results of automated OCR obtained with open source tools can be replaced with transcribed content from the corpus, enabling the user to search within individual prints. The second experiment links the print content with the electronic dictionary, filtering relevant entries with the dictionary of modern Polish to eliminate redundant results. Interconnecting all relevant resources in a digital library-centered platform creates new possibilities both for researchers involved in development of these resources as well as for scholars studying the Polish language of the 17th and 18th centuries.
The work was financed by a research grant from the Polish Ministry of Science and Higher Education under the National Programme for the Development of Humanities for the years 2019–2023 (grant 11H 18 0413 86, grant funds received: 1,797,741 PLN).
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Notes
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Content objects are currently available for over 1 400 prints and constitute to 11 585 pages.
- 3.
See print 1264 at http://cbdu.ijp.pan.pl/12640/. The print also features a historical commentary and a manually created glossary explaining more difficult terms.
- 4.
http://zil.ipipan.waw.pl/PoliMorf, version 0.6.7.
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For two prints out of the 40 transcribed ones the OCR process failed with segmentation fault.
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- 14.
Note: all open source tools used in the process should be treated only as examples and similar results can be achieved with different software. For the OCR PDF conversion the authors of OCRmyPDF suggest several other open source programs for comparison such as pdf2pdfocr or pdfsandwich; a commercial ABBYY FineReader suite is also frequently used for similar purposes.
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Page 3 of a print 1441: Relacja koronacji cudownego obrazu Najświętszej Marii Panny na Górze Różańcowej [w Podkamieniu] (Report on the coronation of the miraculous image of the Virgin Mary on the Rosary Hill [in Podkamień]; https://cbdu.ijp.pan.pl/14410/).
- 18.
The most recent report available to the author estimates the market share for Adobe Reader 10 at 25% market share and Adobe Reader 11 at 55%, see https://www.flexera.com/about-us/press-center/secunia-quarterly-country-report-pdf-readers-left-to-attacks-on-private-us-pcs.html.
- 19.
Version DC 19.012.20035.
- 20.
https://itextpdf.com/en/products/itext-7/itext-7-community, version 7.1.0. Again, there exist many commercial and non-commercial replacements for the software used, such as Evermap AutoBookmark Plug-in https://www.evermap.com/autobookmark.asp or Qoppa jPDFProcess Library https://www.qoppa.com/pdfprocess/.
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The authors would like to thank Grzegorz Kulesza for his diligent proofreading of this paper.
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Ogrodniczuk, M., Gruszczyński, W. (2019). Connecting Data for Digital Libraries: The Library, the Dictionary and the Corpus. In: Jatowt, A., Maeda, A., Syn, S. (eds) Digital Libraries at the Crossroads of Digital Information for the Future. ICADL 2019. Lecture Notes in Computer Science(), vol 11853. Springer, Cham. https://doi.org/10.1007/978-3-030-34058-2_13
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