LOD4JS - Linked Open Data for Jewish Studies
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Presentation at the AJL 2020 Digital Conference
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LOD4JS - Linked Open Data for Jewish Studies
- 1. DiJeSt.net LOD4JS Linked Open Data for Jewish Studies A DiJeSt Project Yael Netzer, Kepa Rodriguez, Sinai Rusinek The project DiJest was supported by Rothschild Foundation Hanadiv Europe slides: https://bit.ly/ajl2020
- 2. DiJeSt.net DiJeSt.net DiJeSt Data: - becoming more connected!
- 3. DiJeSt.net Catalogues as data Traditional objectives of catalogues and authority files (among others): - search a book, discover a book - search by author, place, subject - indexing the inventory Catalogues are bodies of knowledge that change in time Our objective and methodology: Transfer catalogues/authority files into tables Understand content as a whole Inspect variations and unify values such as dates and place names View information in additional perspectives: “distant reading” Digital Humanities concept Derive new representations (e.g., Linked Open Data, maps)
- 4. DiJeSt.net Reading Authority Files - People Starting point: Israeli National Library authority file heb100.xml July 2018 (marc/xml file) 203,771 Entities
- 5. DiJeSt.net Reading Catalogues: Bibliography of the Hebrew Book Small sized (107977 records), comprehensive, importance (authority) But: messy, not machine readable (names, dates, places etc.) No mapping to the authority files of NLI: We did it using OpenRefine
- 6. DiJeSt.net Reading Authority File: Places Connect place names in catalogue to place authority files, following previous work on Kima (by Sinai Rusinek)
- 7. DiJeSt.net Process 1. Identify relevant fields, subfields, indicators in marc(xml,json)from NLI 2. Map into columns using python code 3. Inspect with OpenRefine 4. Back to 1 until satisfied with results
- 8. DiJeSt.net
- 9. DiJeSt.net OpenRefine - A powerful tool - Faceting and clustering - Many knowledge representation formats - Easy identification of errors and inconsistencies - Built-in functions, possible usage of python (jython), closure - Easy API calls, collect and add information - Reconciliation with external, LOD resources - Various exporting options, including generation of linked data (RDFs) - Open source, resourceful community, FAIR principles https://openrefine.org
- 11. DiJeSt.net Data model: framework and ontologies (1) When we designed our model, we decided: ● To make our data available for reuse: open data sharing policy. ● To make our data understandable for computers (machine-actionable). ● To make possible to navigate from our data to other resources. ● Expose our data as Linked Open Data (LOD).
- 12. DiJeSt.net Data model: framework and ontologies (2) LOD uses the Resource Description Framework (RDF) to describe the data as subject-predicate-object triples. ● djr:book_152786 dcterms:creator djr:person_1403804 ○ “The book with ID 152786 was created by the person with ID 1403804” ○ The author of “במלכודת ”נערות is Mordechai Narkis We use standard ontologies to model our entity types. That increases understandability for non-human agents. ● Authorities: ○ Person: skos, schema.org, dbpedia, rdaregistry, eac-cpf ○ Place: skos, schema.org, wgs84_pos ● Books: ○ Dublin core terms, fabio, GND, bibframe
- 13. DiJeSt.net Data model: framework and ontologies (3)
- 14. DiJeSt.net
- 15. DiJeSt.net What can be done with it? eLinda ● http://tdk-p6.cs.technion.ac.il:8083/ ● With Oren Mishali, Technion Data & Knowledge Lab (TD&K) ●
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- 22. DiJeSt.net Vision Connect with other LOD resources: Jewish Book Shelf Judaica link Wikidata Epidat Future projects: Expand the model to also represent: ● Book copies - library holdings ● Book copies can be owned and censored by people (Footprints) ● Works: model Ben Yehuda Project ● Places: model KIMA Include authorities for Publishers and Printers (NLI)
- 23. DiJeSt.net
- 24. DiJeSt.netUsing Kima http://data.geo-kima.org/ and CartoDB to create an interactive map of BHB
- 25. DiJeSt.net label: !תודה alternativeLabel: !תודה alternativeLabel: thank you! http://dijest.net/ This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.