{
 "epoch": "XR-E3",
 "lane": "XR (cross-registry propagation \u2014 OpenAIRE re-probe of the XR-E2 sample)",
 "instrument": "PID Erosion Observatory \u00b7 EA-EROSION-01 (deposit #1045)",
 "observed_at_utc": "2026-10-13T15:36:55+00:00",
 "finished_at_utc": "2026-10-13T15:39:56+00:00",
 "method": {
  "sample": "the 54 DOIs and 2 founding-case controls of XR-E2 (data/xr-e2-openaire-capture-2026-07-12.json), unchanged",
  "endpoints": {
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   "openalex": "https://api.openalex.org/works/doi:<doi>"
  },
  "graph_release_at_capture": "v11.4.0 (released 2026-08-31; latest listed in the changelog at capture)"
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 "founding_case_controls": [
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   "openaire_http": 200,
   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
   "openalex_status": 200,
   "xr_e2_openaire_hit": true
  },
  {
   "doi": "10.5281/zenodo.14538882",
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   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
   "openalex_status": 404,
   "xr_e2_openaire_hit": false
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 "aggregates": {
  "n": 54,
  "openaire_present": 0,
  "openaire_errors": 0,
  "datacite_absent_404": 53,
  "openalex_present_200": 29,
  "changed_since_xr_e2": 13,
  "openalex_note": "OpenAlex: 13 of the 42 records present at XR-E2 returned 404 on /works/doi:<doi> in this pass; the API now meters unkeyed requests against a shared daily budget (429 'Rate limit exceeded' on follow-up checks). The 404s are recorded as observed; whether they reflect removal from OpenAlex is not established by this pass and needs a keyed re-run.",
  "openaire_changed_since_xr_e2": 0
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   "removal_reason": "take-down-request",
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    "openalex_status": 200
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   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
   "openalex_status": 404,
   "vintage": "2017-2019",
   "stratum": "spam",
   "removal_date": "2019-04-11",
   "removal_reason": "spam",
   "xr_e2": {
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    "datacite_status": 404,
    "openalex_status": 404
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   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
   "openalex_status": 404,
   "vintage": "2020-2021",
   "stratum": "spam",
   "removal_date": "2020-10-26",
   "removal_reason": "spam",
   "xr_e2": {
    "openaire_hit": false,
    "datacite_status": 404,
    "openalex_status": 200
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  },
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   "doi": "10.5281/zenodo.10252490",
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   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
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   "stratum": "retracted",
   "removal_date": "2023-12-08",
   "removal_reason": "retracted",
   "xr_e2": {
    "openaire_hit": false,
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    "openalex_status": 200
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  },
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   "doi": "10.5281/zenodo.12313936",
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   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
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   "vintage": "2024",
   "stratum": "spam",
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   "removal_reason": "spam",
   "xr_e2": {
    "openaire_hit": false,
    "datacite_status": 404,
    "openalex_status": 200
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  },
  {
   "doi": "10.5281/zenodo.14776831",
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   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
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   "vintage": "2025",
   "stratum": "spam",
   "removal_date": "2025-02-05",
   "removal_reason": "spam",
   "xr_e2": {
    "openaire_hit": false,
    "datacite_status": 404,
    "openalex_status": 200
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  },
  {
   "doi": "10.5281/zenodo.18527434",
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   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
   "openalex_status": 404,
   "vintage": "2026-preFC",
   "stratum": "spam",
   "removal_date": "2026-02-08",
   "removal_reason": "spam",
   "xr_e2": {
    "openaire_hit": false,
    "datacite_status": 404,
    "openalex_status": 404
   }
  },
  {
   "doi": "10.5281/zenodo.2639968",
   "openaire_http": 200,
   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
   "openalex_status": 404,
   "vintage": "2017-2019",
   "stratum": "spam",
   "removal_date": "2019-04-17",
   "removal_reason": "spam",
   "xr_e2": {
    "openaire_hit": false,
    "datacite_status": 404,
    "openalex_status": 404
   }
  },
  {
   "doi": "10.5281/zenodo.4179258",
   "openaire_http": 200,
   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
   "openalex_status": 404,
   "vintage": "2020-2021",
   "stratum": "spam",
   "removal_date": "2020-11-02",
   "removal_reason": "spam",
   "xr_e2": {
    "openaire_hit": false,
    "datacite_status": 404,
    "openalex_status": 404
   }
  },
  {
   "doi": "10.5281/zenodo.10200226",
   "openaire_http": 200,
   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
   "openalex_status": 404,
   "vintage": "2022-2023",
   "stratum": "retracted",
   "removal_date": "2023-11-23",
   "removal_reason": "retracted",
   "xr_e2": {
    "openaire_hit": false,
    "datacite_status": 404,
    "openalex_status": 200
   }
  },
  {
   "doi": "10.5281/zenodo.11846389",
   "openaire_http": 200,
   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
   "openalex_status": 404,
   "vintage": "2024",
   "stratum": "spam",
   "removal_date": "2024-09-03",
   "removal_reason": "spam",
   "xr_e2": {
    "openaire_hit": false,
    "datacite_status": 404,
    "openalex_status": 200
   }
  },
  {
   "doi": "10.5281/zenodo.17216757",
   "openaire_http": 200,
   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
   "openalex_status": 200,
   "vintage": "2025",
   "stratum": "spam",
   "removal_date": "2025-12-17",
   "removal_reason": "spam",
   "xr_e2": {
    "openaire_hit": false,
    "datacite_status": 404,
    "openalex_status": 200
   }
  },
  {
   "doi": "10.5281/zenodo.17545067",
   "openaire_http": 200,
   "openaire_numFound": 0,
   "openaire_hit": false,
   "datacite_status": 404,
   "openalex_status": 200,
   "vintage": "2026-preFC",
   "stratum": "spam",
   "removal_date": "2026-01-19",
   "removal_reason": "spam",
   "xr_e2": {
    "openaire_hit": false,
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    "openalex_status": 200
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  }
 ],
 "finding": "OpenAIRE Graph: 0/54 sampled deleted records present, unchanged from XR-E2, still with no tombstone or withdrawal marker. Founding-case control 10.5281/zenodo.19013315 (Space Ark v4.2.7), served in full at XR-E2, is now absent (numFound 0, no marker): the one observed departure, between release v11.2.0 (2026-07-09) and v11.4.0 (2026-08-31). No full dataset release is listed after v11.0.1, so OpenAIRE's published dumps do not document it. DataCite 53/54 absent (unchanged). OpenAlex: see openalex_note."
}