GCRI · Registry

Interopérabilité des registres

Registries are only as useful as the links between them. A record that cannot be referenced stably, exported faithfully or read by another system becomes an island, and islands drift apart. This page sets out how stable references, persistent identifiers, metadata crosswalks, export formats and interface semantics let registries exchange records without losing meaning, and how interoperability fails through link rot, lossy mapping and undocumented change.

01Canevas

Comment le travail se déroule.

systèmes · autour de ce sujetIllustratif

Interoperability console

Registry interoperability · Crosswalk · Profile v3

Test suite runningGCRI · Registry

Field mappings

identifiantidcopyRéussite
evidence_labelquality.labelenum mapRéussite
licencerights.licenceSPDX idAmbiguous
versionversionsemverRéussite

Conformité

Required fields92 of 100 requiredControlled terms89 of 95 requiredRound trip98 of 95 required
Interoperability console: the screen’s structure, terms and states for Registry interoperability.Noms donnés à titre d'exemple et valeurs illustratives ; une conception, non un enregistrement ni un système en service.

Fig.Interoperability console: example names and illustrative values, not a record or a live system.

02La question

Registry interoperability: how the risk develops.

Stable references, exports and API semantics. The dossier below sets out how the risk develops, what is measured, where the data come from, how it is modelled and who decides.

Mécanisme

Link rot and content drift

Location links break when sites are reorganised, and links that still resolve may point to changed content. Without persistent identifiers and archived snapshots, references silently stop meaning what their authors intended.

Mécanisme

Lossy crosswalks

Mapping one schema to another drops fields with no equivalent and flattens distinctions, such as several contributor roles folded into one. Round trips lose information, and each exchange makes the copies less alike.

Mécanisme

Undocumented interface change

An interface changes a field’s meaning, format or default without a version or notice. Consumers keep parsing successfully while reading the wrong thing, and the errors surface far from the change that caused them.

Mécanisme

Identity collision across registries

The same organisation, person or work carries different identifiers in different registries, or a local identifier is reused for different things. Joins across systèmes then merge what is distinct or split what is one.

03Méthodes et preuves

How registry interoperability is modelled, measured and tested.

Le modèle, ses hypothèses, ses données et son incertitude, sous la forme qu'un scientifique ou un ingénieur vérifierait. Les structures suivent des méthodes publiées. Les valeurs représentées sont illustratives, ce ne sont pas des résultats.

Jeux de données et provenance

The data classes behind registry interoperability and what is recorded about each before it is used.

Classe de donnéesProvenance consignéeRésolution indiquéeLicence vérifiée
Imagerie satellitaire, optique et radarcapteur, niveau de traitement, date d'acquisitiontaille de pixel et revisitepar scène
Réanalyses et sorties de modèles climatiquesmodèle, expérience, membre, versiongrille et pas de tempspar publication
Capteurs et stations de mesure in situstation, instrument, fiche d'étalonnagepoint et fréquence d'échantillonnagepar réseau
Exposition de la population et des actifsméthode, millésime, sources d'entréetaille et unité de la cellulepar publication
Limites et géographie de référenceproducteur, édition, dateéchellepar édition
Lignage
Enregistrement W3C PROV de la source à la figure
Principes
FAIR : faciles à trouver, accessibles, interopérables, réutilisables
Lacunes
affiché comme manquant, jamais complété en silence
Classes de données et champs de provenance consignés pour chacune ; un jeu de données n'est nommé que lorsque sa licence en admet l'usage.
Principes directeurs FAIR · GO FAIR et FORCE11W3C PROV · World Wide Web ConsortiumOrientations sur le traitement cohérent des incertitudes · GIECCEOS Analysis Ready Data · Comité sur les satellites d'observation de la Terre
04In the five domains

Interoperability lets records from each domain move between systems.

05Indicateurs

Ce qui est mesuré, et avec quelle qualité.

Chaque indicateur porte son unité, sa périodicité, le type de source qui le sous-tend et l'étiquette de preuve que porterait une valeur. Aucune valeur n'est affichée : un programme les fournit sous sa propre autorité.

IndicateurUnitéCadenceType de sourceÉtiquette
Identifier resolution successshare of resolution probesquotidienResolver probesOBSERVÉ
Interface availabilityshare of time availablecontinuAvailability monitoringOBSERVÉ
Export schema conformanceshare of exported records validatingpar publicationSchema validationOBSERVÉ
Crosswalk coverageshare of fields mapped to the target schemapar publicationCrosswalk registerDÉCLARÉ
Round-trip fidelityshare of records returned intactpar publicationRound-trip testOBSERVÉ
Broken outbound referencesshare of referencesmensuelLink checkingOBSERVÉ
Deprecation notice periodjoursper interface changeChange logDÉCLARÉ
Records linked to external persistent identifiersshare of recordsmensuelIdentifier reconciliationOBSERVÉ
06Sources

D'où proviennent les données probantes.

Jeux de données publics et registres institutionnels nommés, chacun avec sa catégorie de licence. Les sources fournies dans le cadre d'accords ne sont utilisées que selon leurs conditions et ne sont jamais republiées.

SourceCe qu'elle apporteCatégorie de licence
DCAT version 3A vocabulary for catalogues, datasets, data services and versions in exchangeW3C document licence, free to implement
Schema.orgA shared vocabulary for embedding structured metadata in web pagesCC BY-SA for the vocabulary
OAI-PMHA protocol for harvesting metadata from repositoriesOpen specification
Scholix link exchangeA framework and services for exchanging links between literature and dataCC0 for link metadata
re3data registry of research data repositoriesDescriptions of repositories with their standards, identifiers and access policiesCC0 for metadata
FAIRsharingA curated registry of standards, databases and policies and their relationshipsCC BY-SA for content
OpenAIRE GraphAn open graph linking publications, data, software, projects and organisations across sourcesCC BY
Spécification OpenAPIA standard description format for HTTP interfacesOpen specification, Apache licence
07Décisions

Qui décide, et à quoi servent les données probantes.

Registry prepares evidence. The decisions below are taken by the authorities named, under their own rules, and never by the platform.

Qui décideLa questionDonnées probantes servies par cette page
Registry and repository managersWhich schemas, identifiers and interfaces to support, and on what deprecation timetableCrosswalk coverage, round-trip losses and the consumers depending on each interface
Research infrastructure fundersWhether to fund integration with an existing registry or a new parallel systemInteroperability measures, standard conformance and existing link coverage
Gestionnaires de donnéesWhether imported records can be merged with local onesIdentifier matches, crosswalk losses and conflicts between sources
National statistics offices and public data portalsWhether registry exports can feed published cataloguesDCAT conformance, licence metadata and the stability of identifiers

Résultats que produit ce thème

  • Stable references for every record, resolving to a current view and its versions
  • Exports in documented formats with schema files and published crosswalks
  • An interface change log with version numbers and deprecation notices
  • Round-trip tests against external registry schemas with every loss listed
08Questions essentielles

What experts ask about interoperability.

  • How should identifiers from different registries be linked without copying records?
  • Which open formats preserve meaning, provenance and rights when records are exported?
  • How are field meanings documented so that two systèmes agree on what a value means?
  • How do interfaces signal that a record has changed or been withdrawn?
  • How are schema changes made without breaking systems that depend on them?
09Mécanismes

Why exchange fails.

Interoperability fails at three levels. Technically, formats and protocols do not match. Semantically, the same field name means different things, so a status of active or a date of publication is silently misread. Organisationally, no one is responsible for keeping links current, so references decay. Semantic failures are the hardest to see because the data moves without error and is simply wrong at the destination.

Shared vocabularies address these. Linked-data formats such as JSON-LD carry meaning with the data, catalogue vocabularies such as DCAT describe datasets, and W3C PROV carries lineage. Methods from l'ingénierie, l'interopérabilité et la gouvernance des données cover these standards and their trade-offs. The Registry’s planned interfaces are described on interfaces.

10Méthodes et limites

Designing for exchange.

  1. 01

    Link, do not copy

    Records refer to external registries by identifier, preserving aliases so an external reference still resolves.

  2. 02

    Documented semantics

    Each field’s meaning, allowed values and version are published alongside any interface.

  3. 03

    Versioned schemas

    Schema changes take a new version, and older records keep the schema they were made under.

  4. 04

    Limites

    Interoperability depends on partners maintaining their own records. Mappings between vocabularies lose nuance, and an export carries rights obligations that the receiving system must honour.

11Méthodes

Comment c'est étudié, et ce que les méthodes ne peuvent pas dire.

  1. Ingénierie, interopérabilité et intendance des donnéesIngestion validée par schéma · Rapprochement des identifiants pérennes · Capture de la filiation dans les chaînes de traitementAppliqué ici
  2. Cybersécurité et cryptographieHistorique des enregistrements inviolable · Exports et publications signés · Modélisation des menaces sur les voies de modificationAppliqué ici
  3. Identité numérique et systèmes numériques publicsAuthentification et autorité de l'émetteur · Désambiguïsation des contributeurs par la personne elle-mêmeAppliqué ici
12Where this page’s references

Where this page’s references lead.

Les organismes et documents à l'aune desquels cette page se lit. Les statuts et éditions changent ; chaque lien mène à l'organisme émetteur.

13Questions

Questions et réponses.

What makes a reference stable?
A persistent identifier, managed by an organisation that commits to keep it resolving, together with versioning, so a citation can point to the exact state of the record that was used.
Why not just use web addresses?
Locations change when sites are restructured or move. A persistent identifier separates the name of a record from its location, so the name survives the move.
What is a crosswalk?
A documented mapping between two metadata schemas. A good crosswalk lists which fields map exactly, which approximately and which have no equivalent, so users know what an exchange will lose.
How are interface changes announced?
Through a versioned change log and a deprecation notice period, so consumers can adapt before an old behaviour is removed. Silent changes to meaning are treated as defects.
Is there an interface I can use now?
No interface is released yet. Each opens with its documentation and terms, and is listed on the interfaces page when it does.
Will exports include restricted records?
No. Interfaces and exports cover public records only, and carry each record’s licence and limits.
Can my registry link to registry records?
Linking by public identifier is the intended approach. To discuss deeper exchange, write to le formulaire de contact; l'accusé de réception donne une référence et indique l'étape suivante.
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