# ntu — surface lifecycle and change posture.
generated: '2026-08-19'
method: probed
source: live probes 2026-08-19 + eduGAIN technical database + DataCite REST API
provider: ntu
lifecycle:

  - surface: DR-NTU (Data) — Dataverse REST API
    x-operator: institution
    status: active
    versioning: >-
      Versioned by the underlying Dataverse platform release (6.1 as archived), surfaced at
      /api/info/version. NTU publishes no API version of its own and no deprecation policy.
    evidence_of_activity:
      - url: https://api.datacite.org/dois?client-id=gdcc.ntu
        status: 200
        detail: Most recent DOI minted 2026-08-17, two days before this profile. Repository is live.
    deprecation_policy: none published
    changelog: none published
    status_page: none — https://status.ntu.edu.sg/ does not resolve

  - surface: DR-NTU (Digital Repository) — DSpace-CRIS REST API + OAI-PMH
    x-operator: tenant
    status: active
    versioning: >-
      DSpace 7.6.3 with cris-2023.02.07, both self-reported at /server/api. Platform-versioned by
      Lyrasis and 4Science; NTU does not control the release cadence.
    earliest_record: 2008-05-15T02:56:52Z (OAI-PMH Identify earliestDatestamp)
    deprecation_policy: none published by NTU
    changelog: upstream only (DSpace release notes)

  - surface: NTU identity federation (SGAF / eduGAIN)
    x-operator: tenant
    status: active
    detail: >-
      Current entity 879352 (Entra-backed) first seen 2026-04-29. The superseded entity 879351 is
      still published in the eduGAIN aggregate and is explicitly labelled
      "Legacy AD FS - DO NOT USE" in its own displayName, dated 2020-02-28. A deprecated entity
      left in an interfederation aggregate with the warning carried in the display name is the
      closest thing to a published deprecation signal NTU has.
    deprecation_signal: in-band, via entity displayName

  - surface: api.ntu.edu.sg
    x-operator: institution
    status: live-but-undocumented
    detail: >-
      Gateway answers on every path with a JSON 404. No route, version, changelog or documentation
      is discoverable. Cannot be dated or versioned.

summary:
  deprecation_policy_published: false
  changelog_published: false
  status_page_published: false
  note: >-
    NTU operates no public change-management surface for any API. Consumers of DR-NTU (Data) and
    DR-NTU (Digital Repository) track the upstream platform vendors' release notes, not NTU's.