{
 "schemaVersion": "1.0.0",
 "constitutionVersion": "1.0.0",
 "createdAt": "2026-08-12T00:00:00Z",
 "description": "Append-only Evidence Passport records. Old revisions are immutable; corrections create a new revision and preserve the previous permalink.",
 "entity": {
  "type": "project",
  "id": "yokohama-open-data",
  "title": "Yokohama Open Data Portal",
  "canonicalUrl": "https://1001smartcities.org/projects/yokohama-open-data/"
 },
 "currentRevisionId": "2026-08-20-source-dates-b8",
 "revisions": [
  {
   "id": "2026-08-18-baseline",
   "createdAt": "2026-08-18T09:00:00Z",
   "effectiveAt": "2026-08-18",
   "changeType": "baseline",
   "summary": "Created the first structured Evidence Passport with 3 claims and 2 source dossiers.",
   "preparedBy": {
    "type": "automation",
    "label": "AI-assisted evidence preparation",
    "humanApproved": false
   },
   "review": {
    "status": "unreviewed",
    "by": null,
    "date": null,
    "note": "Awaiting operator and domain-expert review; publication of this revision implies neither."
   },
   "changes": [
    {
     "operation": "add",
     "path": "/evidencePassport",
     "summary": "Added claim-level evidence mapping and source dossiers."
    },
    {
     "operation": "add",
     "path": "/revisionHistory",
     "summary": "Established a permanent, hash-addressed baseline revision."
    }
   ],
   "snapshotHash": "sha256:b8d18a53c81e240063041c2ae9b00047e2cbe9e4681afe5512a2a996cba936a8",
   "snapshot": {
    "asOf": "2026-08-18",
    "projectFingerprint": "sha256:174f2b4a9dc7058457241f6e13ed9d64f4e01b4de274a3b2e7113ac14a58c605",
    "assurance": {
     "status": "unreviewed",
     "scope": "evidence-passport-revision",
     "statement": "AI-assisted structural preparation. This revision has not been reviewed by a human or subject-matter expert.",
     "machineChecks": [
      "schema",
      "publication-diff-contract",
      "material-project-fingerprint",
      "claim-text-drift",
      "source-reference-resolution",
      "complete-source-dossier",
      "snapshot-hash"
     ]
    },
    "projectState": {
     "status": "live",
     "outcome": "ongoing",
     "evidenceGrade": "official",
     "timeline": {
      "started": null,
      "ended": null
     }
    },
    "governance": {
     "operator": "City of Yokohama",
     "actorTypes": [
      "city-government"
     ],
     "fundingModel": "public",
     "fundingDescription": null,
     "cost": null,
     "ownership": null,
     "decisionRights": null,
     "exitConditions": null
    },
    "claims": [
     {
      "id": "clm-9ed2c3d764895104",
      "field": "snippet",
      "text": "all 654 datasets carry a Creative Commons Attribution licence and none is left without one",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-94e9c413801a82ee"
      ],
      "supportNote": "A package_search call with a license_id facet returns 654 datasets in total and a single facet value, クリエイティブ・コモンズ 表示 (Creative Commons Attribution), with a count of 654 — leaving no dataset without a licence.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-e8961e1e8ea2167d",
      "field": "snippet",
      "text": "The catalogue records themselves were created from March 2024",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-94e9c413801a82ee"
      ],
      "supportNote": "Sorting the catalogue by metadata_created ascending returns an oldest record stamped 2024-03-25, which dates this CKAN instance rather than Yokohama's publishing practice; the document in that record is from June 2017.",
      "caveat": "This dates the current portal instance, not the city's open-data programme, whose start year is not sourced here.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-7d6997ccbc6a1c2f",
      "field": "impact",
      "text": "654 of 654 datasets licensed CC BY, with zero unlicensed records",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-94e9c413801a82ee"
      ],
      "supportNote": "Same facet query: total count 654, single licence facet CC BY with count 654, so the unlicensed remainder is zero.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     }
    ],
    "sources": [
     {
      "id": "src-1186467a365b7287",
      "title": "Yokohama Open Data Portal",
      "url": "https://data.city.yokohama.lg.jp/",
      "publisher": {
       "name": null,
       "domain": "data.city.yokohama.lg.jp",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
       "publishedAt": null,
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-18",
       "dossierCreatedAt": "2026-08-18",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "not-recorded",
       "value": null,
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-94e9c413801a82ee",
      "title": "Yokohama Open Data Portal — package_search API with licence facet",
      "url": "https://data.city.yokohama.lg.jp/api/3/action/package_search?rows=0&facet.field=%5B%22license_id%22%5D",
      "publisher": {
       "name": null,
       "domain": "data.city.yokohama.lg.jp",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-9ed2c3d764895104",
       "clm-e8961e1e8ea2167d",
       "clm-7d6997ccbc6a1c2f"
      ],
      "temporal": {
       "publishedAt": null,
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-18",
       "dossierCreatedAt": "2026-08-18",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "not-recorded",
       "value": null,
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     }
    ],
    "coverage": {
     "claimsTotal": 3,
     "claimsMapped": 3,
     "sourcesTotal": 2,
     "sourcesUsedByClaims": 1,
     "sourcesWithPublicationDate": 0,
     "sourcesWithArchive": 0,
     "sourcesWithExactLocator": 0,
     "sourcesWithContentHash": 0
    },
    "limits": [
     "Publisher names and source languages have not yet been classified; domains are recorded without guessing.",
     "Existing source notes are descriptive locators, not page- or paragraph-exact citations.",
     "A missing archive, publication date or content hash is shown as null rather than inferred.",
     "The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim."
    ]
   }
  },
  {
   "id": "2026-08-20-source-dates-b8",
   "createdAt": "2026-08-20T23:00:00Z",
   "effectiveAt": "2026-08-18",
   "changeType": "update",
   "summary": "Record the publication date of each source that states one; sources that publish no date are marked null.",
   "preparedBy": {
    "type": "automation",
    "label": "AI-assisted evidence preparation",
    "humanApproved": false
   },
   "review": {
    "status": "unreviewed",
    "by": null,
    "date": null,
    "note": "Awaiting operator and domain-expert review; publication of this revision implies neither."
   },
   "changes": [
    {
     "operation": "replace",
     "path": "/snapshot/projectFingerprint",
     "summary": "Updated projectFingerprint to the current sourced project record."
    }
   ],
   "snapshotHash": "sha256:8068e31663246ae70548a4b4fb7424f3f815100636dad0e080e7f7516fabee38",
   "snapshot": {
    "asOf": "2026-08-18",
    "projectFingerprint": "sha256:d51ccb04df6edd81655ddcbbb495c2c971348e0098042efebcbd95595de76728",
    "assurance": {
     "status": "unreviewed",
     "scope": "evidence-passport-revision",
     "statement": "AI-assisted structural preparation. This revision has not been reviewed by a human or subject-matter expert.",
     "machineChecks": [
      "schema",
      "publication-diff-contract",
      "material-project-fingerprint",
      "claim-text-drift",
      "source-reference-resolution",
      "complete-source-dossier",
      "snapshot-hash"
     ]
    },
    "projectState": {
     "status": "live",
     "outcome": "ongoing",
     "evidenceGrade": "official",
     "timeline": {
      "started": null,
      "ended": null
     }
    },
    "governance": {
     "operator": "City of Yokohama",
     "actorTypes": [
      "city-government"
     ],
     "fundingModel": "public",
     "fundingDescription": null,
     "cost": null,
     "ownership": null,
     "decisionRights": null,
     "exitConditions": null
    },
    "claims": [
     {
      "id": "clm-9ed2c3d764895104",
      "field": "snippet",
      "text": "all 654 datasets carry a Creative Commons Attribution licence and none is left without one",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-94e9c413801a82ee"
      ],
      "supportNote": "A package_search call with a license_id facet returns 654 datasets in total and a single facet value, クリエイティブ・コモンズ 表示 (Creative Commons Attribution), with a count of 654 — leaving no dataset without a licence.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-e8961e1e8ea2167d",
      "field": "snippet",
      "text": "The catalogue records themselves were created from March 2024",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-94e9c413801a82ee"
      ],
      "supportNote": "Sorting the catalogue by metadata_created ascending returns an oldest record stamped 2024-03-25, which dates this CKAN instance rather than Yokohama's publishing practice; the document in that record is from June 2017.",
      "caveat": "This dates the current portal instance, not the city's open-data programme, whose start year is not sourced here.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-7d6997ccbc6a1c2f",
      "field": "impact",
      "text": "654 of 654 datasets licensed CC BY, with zero unlicensed records",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-94e9c413801a82ee"
      ],
      "supportNote": "Same facet query: total count 654, single licence facet CC BY with count 654, so the unlicensed remainder is zero.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     }
    ],
    "sources": [
     {
      "id": "src-1186467a365b7287",
      "title": "Yokohama Open Data Portal",
      "url": "https://data.city.yokohama.lg.jp/",
      "publisher": {
       "name": null,
       "domain": "data.city.yokohama.lg.jp",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
       "publishedAt": null,
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-18",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "not-recorded",
       "value": null,
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-94e9c413801a82ee",
      "title": "Yokohama Open Data Portal — package_search API with licence facet",
      "url": "https://data.city.yokohama.lg.jp/api/3/action/package_search?rows=0&facet.field=%5B%22license_id%22%5D",
      "publisher": {
       "name": null,
       "domain": "data.city.yokohama.lg.jp",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-9ed2c3d764895104",
       "clm-e8961e1e8ea2167d",
       "clm-7d6997ccbc6a1c2f"
      ],
      "temporal": {
       "publishedAt": null,
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-18",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "not-recorded",
       "value": null,
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     }
    ],
    "coverage": {
     "claimsTotal": 3,
     "claimsMapped": 3,
     "sourcesTotal": 2,
     "sourcesUsedByClaims": 1,
     "sourcesWithPublicationDate": 0,
     "sourcesWithArchive": 0,
     "sourcesWithExactLocator": 0,
     "sourcesWithContentHash": 0
    },
    "limits": [
     "Publisher names and source languages have not yet been classified; domains are recorded without guessing.",
     "Existing source notes are descriptive locators, not page- or paragraph-exact citations.",
     "A missing archive, publication date or content hash is shown as null rather than inferred.",
     "The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim."
    ]
   }
  }
 ]
}