{
  "dataset": "outcome-change-history",
  "title": "How a registered clinical trial primary outcome moved",
  "required_attribution": "Source: ClinicalTrials.gov. Processed 2026-09-04. This is a frozen snapshot and is NOT maintained current; each row carries an nct_id that links to the live registry entry, which is. Modifications: the registry's fields were reduced to the flags, dates and counts described in schema.json, partial dates were resolved to the last day they could denote, and the change_kind classification is this project's. No record text was altered and none is redistributed here. The version arithmetic and the classification are by the Artificial Wasteland, CC0 1.0.",
  "sources": [
    {
      "id": "src:clinicaltrials-gov",
      "title": "ClinicalTrials.gov, the registry and its archive of record versions",
      "publisher": "U.S. National Library of Medicine, National Institutes of Health",
      "url": "https://clinicaltrials.gov/",
      "accessed": "2026-09-04",
      "licence_id": "CTGOV-TERMS",
      "licence": "ClinicalTrials.gov Terms and Conditions",
      "licence_basis": "publisher-statement",
      "licence_note": "Read at https://clinicaltrials.gov/about-site/terms-conditions on 2026-09-04. The terms contemplate third-party distribution and attach four conditions, introduced with \"In any publication or distribution of these data, you should\": attribute the source as ClinicalTrials.gov, update the data such that they are current at all times, clearly display the date the data were processed by ClinicalTrials.gov, and state any modifications made to the content of the data. A frozen research snapshot cannot satisfy the currency clause literally; the mitigation is that this dataset states its processing date, states that it is frozen, and carries the identifier that resolves to the always-current record. The terms also note the data \"carry an international copyright outside the United States and its Territories or Possessions\" and that some of it \"may be subject to the copyright of third parties\", which is why no record text is redistributed here. Fetching used only the /api/int/ path that clinicaltrials.gov/robots.txt explicitly allows, at its stated Crawl-delay of 1.",
      "role": "The identifier, the status, funder and phase labels, the record dates, and the registry's own version indices and update count."
    },
    {
      "id": "src:aw-version-arithmetic",
      "title": "The version arithmetic, the date resolution and the change classification",
      "publisher": "Artificial Wasteland",
      "url": "https://artwaste.land/strata/added-dropped-or-just-reworded/",
      "accessed": "2026-09-04",
      "licence_id": "CC0-1.0",
      "licence": "CC0 1.0 Universal",
      "licence_basis": "publisher-statement",
      "licence_note": "Ours to give: this project places its own derived fields in the public domain.",
      "role": "Every field marked x-origin: built."
    }
  ]
}