{
 "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": "istanbul-iett-realtime-bus",
  "title": "İETT Real-Time Bus Tracking & Open Transit Data",
  "canonicalUrl": "https://1001smartcities.org/projects/istanbul-iett-realtime-bus/"
 },
 "currentRevisionId": "2026-09-27-baseline-popular",
 "revisions": [
  {
   "id": "2026-09-27-baseline-popular",
   "createdAt": "2026-09-27T13:01:00Z",
   "effectiveAt": "2026-09-27",
   "changeType": "baseline",
   "summary": "Created the first structured Evidence Passport with 9 claims and 6 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": "sha256:8f369b2f4235eea90c63aa3375eb9aba180949f95048e60159f7e83fde500907",
   "snapshot": {
    "asOf": "2026-09-27",
    "projectFingerprint": "sha256:0057065a8c9dfee2b561525a0503a71134395c6d721a7d3a12dcc49b369ffde4",
    "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": "İETT",
     "actorTypes": [
      "utility"
     ],
     "fundingModel": "public",
     "fundingDescription": null,
     "cost": null,
     "ownership": null,
     "decisionRights": null,
     "exitConditions": null
    },
    "claims": [
     {
      "id": "clm-32d6a6c0a3ba3bc9",
      "field": "snippet",
      "text": "Istanbul's public bus operator İETT tracks the positions of its buses and surfaces live vehicle locations, stop-level arrival predictions and route information through its official app",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-e4990101510c1718",
       "src-7903c5752e6374b9",
       "src-bfb6ce5ea4c37580"
      ],
      "supportNote": "The open web service İETT publishes exposes a fleet vehicle-position operation (GetFiloAracKonum_json); the Google Play description says the stop page shows which bus will reach the stop in how many minutes; the App Store release notes describe live tracking and bus icons on the route map.",
      "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-65425cb83ba6d085",
      "field": "snippet",
      "text": "originally 'Mobiett', replaced on 31 August 2023 by 'Otobüsüm Nerede' ('Where Is My Bus')",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f93c4be755468dc5"
      ],
      "supportNote": "İETT's announcement, dated 29 August 2023, says Otobüsüm Nerede takes Mobiett's place from 31 August.",
      "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-cb5915741dc06bfa",
      "field": "snippet",
      "text": "İETT also publishes GTFS schedules and web services, including fleet vehicle positions, on İBB's open data portal",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      ],
      "supportNote": "The portal lists an İETT GTFS dataset (created 23 February 2022, last updated 21 April 2026) and İETT web services; the journey service describes itself as sharing 'instant journey realization rates' and its service definition includes a fleet vehicle-position operation.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
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      "field": "snippet",
      "text": "under a licence that allows commercial reuse with attribution, so third-party apps can run on the same data",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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       "src-fa9a7eaebf1852cb"
      ],
      "supportNote": "The İBB Open Data Licence grants a worldwide, royalty-free licence to copy, adapt and use the information commercially and non-commercially, on condition of attribution; the GTFS dataset is published under it.",
      "caveat": "The licence is İBB's own text, modelled on open-government licences; where the data provider names no attribution statement, it asks users to credit the data as licensed under CC BY 4.0.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-ea3a37a2f5ed841c",
      "field": "impact",
      "text": "İETT publishes no usage, accuracy or ridership figures for the app",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f93c4be755468dc5",
       "src-7903c5752e6374b9",
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      ],
      "supportNote": "Neither the operator's announcement nor its store listings state download, usage or prediction-accuracy figures; the only numbers on record are the store platforms' own counters.",
      "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-9675a9359d805438",
      "field": "impact",
      "text": "Its own store listings show more than one million Android downloads and average ratings of 2.4 out of 5 on Google Play and 1.3 out of 5 on the App Store",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-7903c5752e6374b9",
       "src-bfb6ce5ea4c37580"
      ],
      "supportNote": "Google Play shows '1 Mn+ İndirme' and a 2.4-star average from about 13,900 reviews; the App Store shows '1.3 out of 5' from about 7,000 ratings.",
      "caveat": "Store counters change continuously; these are the figures displayed in September 2026, and ratings measure satisfaction, not accuracy.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-fac9834b8e7b84e5",
      "field": "impact",
      "text": "with reviews comparing it unfavourably with Mobiett, the app it replaced",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-bfb6ce5ea4c37580"
      ],
      "supportNote": "App Store reviews from 2023 complain that Mobiett gave bus times 'to the minute' and that the replacement is unreliable.",
      "caveat": "Store reviews are a self-selected sample of users.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-5e94c9633be05df9",
      "field": "lesson",
      "text": "the data underneath stayed the same, but the new app launched to reviews that preferred the one it retired",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f93c4be755468dc5",
       "src-bfb6ce5ea4c37580"
      ],
      "supportNote": "The operator presented the new app as carrying all of Mobiett's functions; early reviews still preferred Mobiett.",
      "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-b4afa8c0a97a4de5",
      "field": "lesson",
      "text": "Publishing the same data openly is what keeps riders from depending on a single official app",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-fa9a7eaebf1852cb",
       "src-4606017555d583ca"
      ],
      "supportNote": "The GTFS dataset and web services are published under a licence permitting reuse in third-party products, so riders are not tied to the operator's own app.",
      "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-f93c4be755468dc5",
      "title": "İETT — 'Mobiett yerini Otobüsüm Nerede'ye bırakıyor' (operator announcement, 29 August 2023)",
      "url": "https://iett.istanbul/Announcement/Detail/2651",
      "publisher": {
       "name": null,
       "domain": "iett.istanbul",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
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      ],
      "temporal": {
       "publishedAt": "2023-08-29",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-09-27",
       "dossierCreatedAt": "2026-09-27",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Official İETT announcement of 29 August 2023: from 31 August the Otobüsüm Nerede app takes the place of Mobiett and carries all of Mobiett's functions and more.",
       "exact": false
      },
      "preservation": {
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       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-bfb6ce5ea4c37580",
      "title": "Otobüsüm Nerede — official İETT app (App Store)",
      "url": "https://apps.apple.com/tr/app/otob%C3%BCs%C3%BCm-nerede/id1600651996",
      "publisher": {
       "name": null,
       "domain": "apps.apple.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
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       "clm-ea3a37a2f5ed841c",
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      ],
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       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Store listing of İETT's official app: routes, timetables, stops and live bus tracking on a route map; version 1.0 dated 26 January 2023. Displays an average of 1.3 out of 5 from about 7,000 ratings, with reviews comparing it unfavourably with Mobiett.",
       "exact": false
      },
      "preservation": {
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       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-fa9a7eaebf1852cb",
      "title": "İBB Open Data Portal — İETT GTFS data",
      "url": "https://data.ibb.gov.tr/dataset/iett-gtfs-verisi",
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       "name": null,
       "domain": "data.ibb.gov.tr",
       "classification": "not-classified"
      },
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      "role": "claim-evidence",
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      "temporal": {
       "publishedAt": "2022-02-23",
       "updatedAt": "2026-04-21",
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       "type": "descriptive-source-note",
       "value": "İETT's GTFS dataset (agency, calendar, routes, stops, stop_times, trips) on İBB's open data portal, created 23 February 2022 and last updated 21 April 2026, under the İBB Open Data Licence. Real-time data sits in separate web-service datasets.",
       "exact": false
      },
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       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-e4990101510c1718",
      "title": "İBB Open Data Portal — İETT journey web service (Sefer Gerçekleşme), with fleet vehicle positions",
      "url": "https://data.ibb.gov.tr/dataset/sefer-gerceklesme-web-servisi",
      "publisher": {
       "name": null,
       "domain": "data.ibb.gov.tr",
       "classification": "not-classified"
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      "role": "claim-evidence",
      "claimRefs": [
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       "clm-cb5915741dc06bfa"
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      "temporal": {
       "publishedAt": "2020-01-13",
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       "recordLastVerifiedAt": "2026-09-27",
       "dossierCreatedAt": "2026-09-27",
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       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "İBB open data portal entry for İETT's journey web service, published 13 January 2020: 'Instant journey realization rates of IETT are shared with this web service.' Its service definition also offers a fleet vehicle-position query (GetFiloAracKonum_json) and a per-line vehicle-position query.",
       "exact": false
      },
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       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-7903c5752e6374b9",
      "title": "Otobüsüm Nerede — official İETT app (Google Play)",
      "url": "https://play.google.com/store/apps/details?id=com.iett.otobusumnerede",
      "publisher": {
       "name": null,
       "domain": "play.google.com",
       "classification": "not-classified"
      },
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      "language": "und",
      "role": "claim-evidence",
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      ],
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       "recordLastVerifiedAt": "2026-09-27",
       "dossierCreatedAt": "2026-09-27",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Google Play listing of İETT's official app. The stop page shows which lines serve a stop and in how many minutes each bus will arrive; the listing shows more than a million downloads and an average of 2.4 out of 5.",
       "exact": false
      },
      "preservation": {
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       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-4606017555d583ca",
      "title": "İBB Open Data Portal — Istanbul Metropolitan Municipality Open Data Licence",
      "url": "https://data.ibb.gov.tr/license",
      "publisher": {
       "name": null,
       "domain": "data.ibb.gov.tr",
       "classification": "not-classified"
      },
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      "role": "claim-evidence",
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      ],
      "temporal": {
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       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-09-27",
       "dossierCreatedAt": "2026-09-27",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Text of the İBB Open Data Licence: a worldwide, royalty-free, perpetual, non-exclusive licence to copy, publish, adapt and use the information commercially and non-commercially, on condition of attribution; without a provider-specified statement, users credit the data as licensed under CC BY 4.0.",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     }
    ],
    "coverage": {
     "claimsTotal": 9,
     "claimsMapped": 9,
     "sourcesTotal": 6,
     "sourcesUsedByClaims": 6,
     "sourcesWithPublicationDate": 3,
     "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."
    ]
   }
  }
 ]
}