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HAL’s mission is to share and to archive scientific publications, of all disciplines, emanating from French or foreign research, public or private. Breaking with the enclosure of knowledge, HAL allows the free circulation of knowledge through rapid, transparent and complete dissemination of research results and open access to scientists as well as to the whole of civil society. By guaranteeing long-term access and preservation, HAL is also an open and sustainable instrument of scientific sovereignty.

Core principles

  • an OAI infrastructure ensuring interoperability;
  • a stability of identifiers (URL of deposits in particular);
  • a preservation of documents thanks to a partnership with CINES for archiving;
  • a scientific quality of documents deposited as well as the details describing them;
  • a time stamping of deposits guaranteeing the paternity rights of the text deposited;
  • reference data available through auréHAL for authors, research organisations, journals, scientific fields, and funders (ANR, european projects);
  • a set of services to promote (researcher identifier idHAL, CV, collection, portals), monitor (statistics), consult and use content (SolR search engine, API, Triplestore, TEI, etc.).

FAIR principles

The FAIR principles (Findable, Accessible, Interoperable, Reusable) describe how data should be organised to be more easily accessible, understood, exchangeable and reusable.

The increasing availability of online resources implies that the platforms that host them implement protocols and standards so that, today as tomorrow, humans and machines can exploit them.

Standards and protocols
Findable - Each deposited file is described with rich metadata (bibliographic metadata, author’s affiliation, ANR or European projects metadata)
- Metadata of each deposit are assigned a HAL identifier which is unique and persistent
- Metadata are indexed in a searchable resource
- The access is open and free
URI, Dublin Core, TEI, RDF, Sparql
Accessible - Metadata are accessible via open standards and protocols
- Metadata are accessible via open APIs (no prior registration), OAI-PMH and in a triplestore
- The contents of the documents are available in open and free access
- Data are stored in a secure environment (IN2P3 Computing Center) and accessible via open protocols
- Documents are sent to the CINES to preserve their long term accessibility and readability
OAI-PMH, API, RDF Triplestore, OAIS
Interoperable - Use of identifiers: DOI, PMID, SWHid, arxivid (see also Identifiers used in HAL)
- Alignment with idRef, ORCID, ROR, RNSR
- Vocabularies: DC, RDF, FOAF, SKOS, BILBO, Fabio
Reusable - Metadata is distributed under a CC0 license
- A distribution license is added for the publications deposited in HAL
- General terms of use (in progress)

Last update: November 3, 2023
Created: October 9, 2023