{"url":"/dataset/citations-to-invalid-doi-identified-entities","name":"Citations to invalid DOI-identified entities obtained from processing DOI-to-DOI citations to add in COCI","full_name":null,"description_markdown":"This dataset contains a two-column CSV file, where the first column (\"Valid_citing_DOI\") contains the DOI of a citing entity retrieved in Crossref, while the second column (\"Invalid_cited_DOI\") contains the invalid DOI of a cited entity identified by looking at the field \"reference\" in the JSON document returned by querying the [Crossref API](https://api.crossref.org/ ) with the citing DOI.\r\n\r\nThese citations to invalid DOIs have been retrieved while processing Crossref data for adding open citations in [COCI, the OpenCitations Index of Crossref open DOI-to-DOI citations](http://opencitations.net/index/coci). The citations listed in the present dataset have not been added in COCI since they point to a non-resolvable cited document.","description_withheld":null,"homepage":"https://doi.org/10.5281/zenodo.4625300","introduced_date":"2021-03-21","introduced_date_note":null,"introduced_by":{"paper":"/paper/identifying-and-correcting-invalid-citations","title":"Identifying and correcting invalid citations due to DOI errors in Crossref data","first_author":null,"url":null},"license":{"name":"CC0","url":"https://creativecommons.org/publicdomain/zero/1.0/legalcode"},"modalities":[{"name":"Tabular","url":"/datasets/modality/tabular"}],"tasks":[],"languages":[{"name":"English","url":"/datasets/language/english"}],"variants":["Citations to invalid DOI-identified entities obtained from processing DOI-to-DOI citations to add in COCI"],"data_loaders":[],"num_papers_in_archive":1,"source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28"},"benchmarks":[],"papers_with_a_benchmark_row":[],"syntology_totals":{"read_at":"2026-09-24T18:15:14+00:00","papers_with_samples":0,"samples_harvested":0,"samples_ran":0,"samples_unverified":0,"pointer_only_for_licence":0,"papers_with_no_sample_that_ran":0,"note":"the per-paper counts above, summed; not a rate"},"papers_note":"The archive never published its papers-using-dataset list; these are papers with a leaderboard row on this dataset's benchmarks."}