specification: API Commons Lifecycle
specificationVersion: '0.1'
provider: University of Göttingen
providerId: university-of-gottingen
generated: '2026-08-30'
method: derived
source: >-
  Observed endpoint behaviour and registry records probed on 2026-08-30; no lifecycle or
  deprecation policy is published by the institution.
description: >-
  The University of Göttingen publishes no API lifecycle policy, no versioning statement, no
  changelog and no deprecation notice for any of its machine-readable surfaces. Version identity
  is carried entirely by the underlying protocol rather than by anything the institution declares.
observations:
- surface: GDZ OAI-PMH
  versioning: Protocol version only — the Identify response declares protocolVersion 2.0.
  earliest_content: '1998-03-01'
  deprecation_policy: none published
  detail: >-
    earliestDatestamp of 1998-03-01 makes this one of the longer-running continuously operated
    harvesting endpoints in the cohort. deletedRecord policy is "no", so harvesters cannot detect
    withdrawals.
- surface: eDiss OAI-PMH
  versioning: Protocol version only — protocolVersion 2.0.
  earliest_content: '2013-01-22'
  deprecation_policy: none published
  detail: deletedRecord policy is "transient".
- surface: SUB IIIF
  versioning: >-
    IIIF Image API 2.0 (level 2). The institution has not moved to IIIF Image API 3.0, and no
    migration statement exists.
  deprecation_policy: none published
- surface: Identity federation
  versioning: SAML 2.0; entity registered in DFN-AAI since 2017-04-13.
  deprecation_policy: governed by DFN-AAI federation policy, not by the institution.
- surface: Institutional documentation
  versioning: none
  deprecation_policy: none published
  detail: >-
    The SUB Göttingen website was reorganised at some point after 2026-06, retiring the
    digital-library and digital-tools documentation paths without a 404 and without redirect
    notices. Documentation URLs for this institution should be re-verified on every pass.