Normalized subject indexing data of K10plus library union catalog

This dataset contains normalized subject indexing data of K10plus library union catalog. It includes links between bibliographic records in K10plus and concepts (subjects or classes) from controlled vocabularies: kxp-subjects_2022-06-30.tsv: subject indexing with syntactically valid identifiers kxp-subjects_2022-06-30.nt.gz: RDF representation in form of NTriples vocabularies.json: information about vocabularies K10plus is a union catalog of German libraries, run by library service centers BSZ and VZG since 2019. The catalog contains bibliographic data of the majority of academic libraries in Germany. Statistics The TSV dataset is 1,8GB with 23.306.480 records and 77.705.044 links to concepts. Number of concepts per vocabulary: asb 5340 stw 104118 nlm 129289 ssd 153242 kab 159543 sfb 432141 sdnb 4593798 ddc 9248794 rvk 10172838 bk 13321229 gnd 39384712 Number of RDF Triples: 77.545.501 TSV The .tsv file contains three tab-separated columns: Bibliographic record identifier (PPN) Vocabulary symbol Notation or identifier in the vocabulary An example: 0010000011 bk 58.55 0010000011 gnd 4036582-7 Record 0010000011 is indexed with class 58.55 from Basic Classification and with authority record 4036582-7 from Integrated authority file. Several APIs exist to retrieve more data for a record via its PPN, e.g. https://opac.k10plus.de/PPNSET?PPN={PPN} https://unapi.k10plus.de/?format=marcxml&id=opac-de-627:ppn:{PPN} https://ws.gbv.de/suggest/csl2?citationstyle=ieee&language=en&database=opac-de-627&query=pica.ppn=010000011 The first can be used to link into the K10plus OPAC and the third can be used for instance to display a simple citation. APIs to look up more data from a notation or identifier of a vocabulary can be found in https://bartoc.org/. For instance BK class 58.55 can be retrieved via DANTE API: https://api.dante.gbv.de/data?uri=http%3A%2F%2Furi.gbv.de%2Fterminology%2Fbk%2F58.55 See vocabularies.json for mapping of vocabulary symbol to BARTOC URI and additional information. RDF The .nt.gz file contains RDF triples with a subset of the information given in the .tsv file. Only vocabularies with known mapping to RDF are included. An example: <http://uri.gbv.de/document/opac-de-627:ppn:0010000011> <http://purl.org/dc/terms/subject> <http://d-nb.info/gnd/4036582-7> . http://uri.gbv.de/document/opac-de-627:ppn:0010000011 http://purl.org/dc/terms/subject http://uri.gbv.de/terminology/bk/58.55 . License and provenance All data is public domain but references are welcome. See https://coli-conc.gbv.de/ for related projects and documentation. The data has been derived from a larger datase of all subject indexing data, published at https://doi.org/10.5281/zenodo.6817455. This dataset has been created with public scripts from git repository https://github.com/gbv/k10plus-subjects.