| --- |
| license: cc0-1.0 |
| language: |
| - fr |
| - en |
| tags: |
| - hal |
| - science |
| - scholarly-metadata |
| - oai-pmh |
| pretty_name: HAL metadata snapshot |
| size_categories: |
| - 1M<n<10M |
| configs: |
| - config_name: default |
| data_files: |
| - split: train |
| path: data/train-*.parquet |
| dataset_info: |
| features: |
| - name: id |
| dtype: string |
| - name: version |
| dtype: int16 |
| - name: url |
| dtype: string |
| - name: pdf_url |
| dtype: string |
| - name: title |
| dtype: string |
| - name: titles |
| list: |
| - name: lang |
| dtype: string |
| - name: text |
| dtype: string |
| - name: authors |
| sequence: string |
| - name: contributors |
| sequence: string |
| - name: abstract |
| dtype: string |
| - name: abstracts |
| list: |
| - name: lang |
| dtype: string |
| - name: text |
| dtype: string |
| - name: keywords |
| sequence: string |
| - name: domains |
| sequence: string |
| - name: domain_codes |
| sequence: string |
| - name: doc_type |
| dtype: string |
| - name: type_labels |
| sequence: string |
| - name: type_eurepo |
| sequence: string |
| - name: date |
| dtype: string |
| - name: year |
| dtype: int16 |
| - name: datestamp |
| dtype: timestamp[s] |
| - name: language |
| dtype: string |
| - name: publisher |
| dtype: string |
| - name: source |
| sequence: string |
| - name: citation |
| dtype: string |
| - name: doi |
| dtype: string |
| - name: arxiv_id |
| dtype: string |
| - name: pmid |
| dtype: string |
| - name: issn |
| sequence: string |
| - name: isbn |
| sequence: string |
| - name: license |
| dtype: string |
| - name: access_rights |
| dtype: string |
| - name: funding |
| sequence: string |
| - name: collections |
| sequence: string |
| - name: oai_identifier |
| dtype: string |
| --- |
| # HAL metadata snapshot |
|
|
| Bibliographic metadata of the records in [HAL](https://hal.science), the French national open |
| archive operated by CCSD, harvested through its OAI-PMH interface (`https://api.archives-ouvertes.fr/oai/hal/`, |
| `metadataPrefix=oai_dc`). |
|
|
| - Snapshot date: 2026-10-21 |
| - Records: 4,610,856 (deleted records excluded), in 19 Parquet file(s) |
| - One row per HAL document (latest harvested version); `id` is the HAL identifier. |
|
|
| ## Columns |
|
|
| Field names refer to Dublin Core elements of the OAI record. |
|
|
| | column | type | source | |
| |---|---|---| |
| | `id` | string | HAL identifier without version, e.g. `hal-01234567` | |
| | `version` | int16 | HAL version number of the harvested record (from the OAI identifier) | |
| | `url` | string | HAL landing page (`dc:identifier`, or built from `id`): the link to credit HAL with | |
| | `pdf_url` | string | Main file URL when HAL exposes one | |
| | `title` | string | First `title` | |
| | `titles` | list of struct | All titles with their `xml:lang` | |
| | `authors` | list[string] | `creator`, in record order | |
| | `contributors` | list[string] | `contributor` | |
| | `abstract` | string | English abstract if present, otherwise the first one (`description`/`abstract`) | |
| | `abstracts` | list of struct | All abstracts with their `xml:lang` | |
| | `keywords` | list[string] | `subject` values that are not HAL discipline labels | |
| | `domains` | list[string] | HAL discipline labels from `subject` (e.g. `[INFO.INFO-LG] Computer Science [cs]/...`) | |
| | `domain_codes` | list[string] | Discipline codes from the OAI `subject:*` sets | |
| | `doc_type` | string | HAL document-type code from the OAI `type:*` sets (ART, COMM, THESE, ...) | |
| | `type_labels` | list[string] | `type` values that are not info:eu-repo URIs (e.g. Journal articles) | |
| | `type_eurepo` | list[string] | info:eu-repo/semantics type and version URIs from `type` | |
| | `date` | string | `date` / `issued` as stored | |
| | `year` | int16 | Year of `date` | |
| | `datestamp` | timestamp | OAI-PMH datestamp: last modification of the record | |
| | `language` | string | `language` | |
| | `publisher` | string | `publisher` | |
| | `source` | list[string] | `source` (journal / conference / book the work appeared in) | |
| | `citation` | string | Bibliographic citation found in `identifier` / `bibliographicCitation` | |
| | `doi` | string | DOI (normalized) found in identifiers / relations | |
| | `arxiv_id` | string | arXiv id from `relation` (info:eu-repo/semantics/altIdentifier/arxiv/...) | |
| | `pmid` | string | PubMed id from `relation` | |
| | `issn` | list[string] | ISSNs found in `source` / `identifier` | |
| | `isbn` | list[string] | ISBNs found in `source` / `identifier` | |
| | `license` | string | Licence URL from `rights` | |
| | `access_rights` | string | info:eu-repo access level from `rights` (openAccess, embargoedAccess, ...) | |
| | `funding` | list[string] | info:eu-repo/grantAgreement relations | |
| | `collections` | list[string] | HAL collections from the OAI `collection:*` sets | |
| | `oai_identifier` | string | OAI identifier of the harvested record | |
|
|
| ## Notes |
|
|
| - Values come from HAL as-is; author names, languages and dates are not normalized. |
| - `domain_codes`, `doc_type` and `collections` come from the OAI set memberships of each record. |
|
|
| ## Licence |
|
|
| HAL distributes the metadata of all its deposits under [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) |
| ([HAL documentation](https://doc.hal.science/en/aspects-juridiques/conditions-de-reutilisation/)), |
| and this dataset is released under the same terms. HAL asks reusers to mention the source with a |
| link to each record (e.g. `https://hal.science/hal-00000001`); every row carries it in `url`. |
| Please keep that link and cite HAL (CCSD) as the source. |
|
|
| This dataset contains metadata only. Files deposited in HAL have their own licences (Creative |
| Commons, Licence Ouverte or copyright, chosen by the authors) and are not part of this dataset. |
|
|
| ## Personal data |
|
|
| Records contain the names of authors and contributors as published in HAL. CC0 waives copyright, |
| not data-protection rights: if you are an author and want a record removed from this copy, open a |
| discussion on this dataset. Records withdrawn from HAL are removed when the dataset is refreshed. |
|
|
