README.md

metadata

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, 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 (HAL documentation), 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.