{
 "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": "singapore-smart-water-grid",
  "title": "PUB Smart Water Grid & Leak-Detection Sensor Network",
  "canonicalUrl": "https://1001smartcities.org/projects/singapore-smart-water-grid/"
 },
 "currentRevisionId": "2026-08-27-source-dating",
 "revisions": [
  {
   "id": "2026-08-27-claims-and-sources",
   "createdAt": "2026-08-27T04:13:17Z",
   "effectiveAt": "2026-07-17",
   "changeType": "baseline",
   "summary": "Created the first structured Evidence Passport with 8 claims and 3 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": "sha256:586b363e15d0e8f8135314a5210bf7564d0da9461b84454c4c3026437ad37488",
   "snapshot": {
    "asOf": "2026-07-17",
    "projectFingerprint": "sha256:a6430b60091090d433c542f6caf7cfb20c2f3115df283a0360b913a34865bc6d",
    "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": 2016,
      "ended": null
     }
    },
    "governance": {
     "operator": "PUB, Singapore's National Water Agency",
     "actorTypes": [
      "utility"
     ],
     "fundingModel": "utility",
     "fundingDescription": null,
     "cost": null,
     "ownership": null,
     "decisionRights": null,
     "exitConditions": null
    },
    "claims": [
     {
      "id": "clm-7c6ef7a118476803",
      "field": "snippet",
      "text": "PUB, Singapore's national water agency, runs a Smart Water Grid that layers sensors and analytics across the island's distribution network",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-8ae1b07de4798dcf",
       "src-f15a584e6a4e52fd"
      ],
      "supportNote": "The agency's site presents the Smart Water Grid programme, and the November 2020 article describes sensors feeding a centralised server where advanced analytics monitor the readings.",
      "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-9f165182c708b858",
      "field": "snippet",
      "text": "Acoustic leak sensors listen to noise characteristics inside the pipe, send readings to a central server and alert PUB automatically, pinpointing a leak to within about 3 metres",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd"
      ],
      "supportNote": "The November 2020 article states the sensors work by monitoring and analysing noise characteristics in pipes, that the data is collated in a centralised server where analytics alert PUB automatically, and that they pinpoint the leak within 3 metres along the pipe.",
      "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-7c4b185d52555bde",
      "field": "snippet",
      "text": "They were first trialled in 2017 with 120 sensors along roughly 70 km of large water mains; PUB said it would scale progressively to 1,200 sensors islandwide for leak monitoring by 2021",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd"
      ],
      "supportNote": "The article states leak monitoring sensors were first trialled in 2017 with 120 sensors installed along approximately 70 km of large water mains, and that PUB plans to scale up progressively and deploy 1,200 sensors islandwide for leak monitoring by 2021.",
      "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-8a2d51a9861d53ea",
      "field": "impact",
      "text": "The trial detected 13 leaks over three years across 120 sensors on about 70 km of large mains",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd"
      ],
      "supportNote": "The article states the trial was successful, with the sensors detecting 13 leaks over a three-year period.",
      "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-9e99470bab049fba",
      "field": "impact",
      "text": "In one case in 2018 the sensors flagged a potential leak on a 700 mm main beside a major expressway, and excavation found a 13 mm corrosion hole",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd"
      ],
      "supportNote": "The article describes the 2018 incident: sensors alerted PUB to a potential leak on a 700 mm diameter water pipe alongside a major expressway, and excavation revealed a 13 mm corrosion hole.",
      "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-2cfeb651fed44d11",
      "field": "lesson",
      "text": "nothing in the record here measures what the grid added to it",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd",
       "src-8ae1b07de4798dcf",
       "src-2fb4ca943c41eb65"
      ],
      "supportNote": "None of the three sources compares water loss before and after the sensor deployment or isolates the grid's contribution.",
      "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-25367ea8344308f3",
      "field": "lesson",
      "text": "the trade article that carries every figure in this entry is published by PUB itself",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd"
      ],
      "supportNote": "The article's own byline names PUB, Singapore's National Water Agency as the publishing partner organisation.",
      "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-8168efa76cd2a5b8",
      "field": "lesson",
      "text": "no source confirms whether the 1,200-sensor target set for 2021 was reached",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd",
       "src-8ae1b07de4798dcf"
      ],
      "supportNote": "The 2020 article states the target; neither it nor the agency site reports the deployment actually achieved.",
      "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-2fb4ca943c41eb65",
      "title": "Smart Water (Springer, peer-reviewed) — Singapore water management",
      "url": "https://link.springer.com/article/10.1186/s40713-016-0004-4",
      "publisher": {
       "name": null,
       "domain": "link.springer.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-2cfeb651fed44d11"
      ],
      "temporal": {
       "publishedAt": null,
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-07-17",
       "dossierCreatedAt": "2026-09-03",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "A journal article on Singapore water management; the full text is not openly readable.",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-f15a584e6a4e52fd",
      "title": "Smart Water Magazine (trade) — PUB adopts smart tools to detect and pre-empt pipe leaks (content published by PUB)",
      "url": "https://smartwatermagazine.com/news/pub-singapores-national-water-agency/pub-adopts-smart-tools-detect-and-pre-empt-pipe-leaks",
      "publisher": {
       "name": null,
       "domain": "smartwatermagazine.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-7c6ef7a118476803",
       "clm-9f165182c708b858",
       "clm-7c4b185d52555bde",
       "clm-8a2d51a9861d53ea",
       "clm-9e99470bab049fba",
       "clm-2cfeb651fed44d11",
       "clm-25367ea8344308f3",
       "clm-8168efa76cd2a5b8"
      ],
      "temporal": {
       "publishedAt": "2020-11-12",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-07-17",
       "dossierCreatedAt": "2026-09-03",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Leak sensors: 120 units on ~70km of mains from 2017, scaling to 1,200 islandwide, ~3m location accuracy.",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-8ae1b07de4798dcf",
      "title": "PUB, Singapore's National Water Agency (authority)",
      "url": "https://www.pub.gov.sg/",
      "publisher": {
       "name": null,
       "domain": "pub.gov.sg",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-7c6ef7a118476803",
       "clm-2cfeb651fed44d11",
       "clm-8168efa76cd2a5b8"
      ],
      "temporal": {
       "publishedAt": null,
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-07-17",
       "dossierCreatedAt": "2026-09-03",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "The agency's own site, used as the reference for the Smart Water Grid programme.",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     }
    ],
    "coverage": {
     "claimsTotal": 8,
     "claimsMapped": 8,
     "sourcesTotal": 3,
     "sourcesUsedByClaims": 3,
     "sourcesWithPublicationDate": 1,
     "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": "2026-08-27-source-dating",
   "createdAt": "2026-08-27T13:37:00Z",
   "effectiveAt": "2026-07-17",
   "changeType": "correction",
   "summary": "Every source on this entry now carries a date key: a publication date where the publisher states one, otherwise an explicit null with the reason on the record.",
   "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."
    },
    {
     "operation": "replace",
     "path": "/snapshot/sources",
     "summary": "Updated sources to the current sourced project record."
    }
   ],
   "snapshotHash": "sha256:3518a094a745d17485eea9aa50ed80999c2798ac3233c0fc260428290ffd37db",
   "snapshot": {
    "asOf": "2026-07-17",
    "projectFingerprint": "sha256:1e75bf48636358a1155b38da9a654bcbbc361ddfe83aefdfe4596e4b65096404",
    "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": 2016,
      "ended": null
     }
    },
    "governance": {
     "operator": "PUB, Singapore's National Water Agency",
     "actorTypes": [
      "utility"
     ],
     "fundingModel": "utility",
     "fundingDescription": null,
     "cost": null,
     "ownership": null,
     "decisionRights": null,
     "exitConditions": null
    },
    "claims": [
     {
      "id": "clm-7c6ef7a118476803",
      "field": "snippet",
      "text": "PUB, Singapore's national water agency, runs a Smart Water Grid that layers sensors and analytics across the island's distribution network",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-8ae1b07de4798dcf",
       "src-f15a584e6a4e52fd"
      ],
      "supportNote": "The agency's site presents the Smart Water Grid programme, and the November 2020 article describes sensors feeding a centralised server where advanced analytics monitor the readings.",
      "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-9f165182c708b858",
      "field": "snippet",
      "text": "Acoustic leak sensors listen to noise characteristics inside the pipe, send readings to a central server and alert PUB automatically, pinpointing a leak to within about 3 metres",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd"
      ],
      "supportNote": "The November 2020 article states the sensors work by monitoring and analysing noise characteristics in pipes, that the data is collated in a centralised server where analytics alert PUB automatically, and that they pinpoint the leak within 3 metres along the pipe.",
      "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-7c4b185d52555bde",
      "field": "snippet",
      "text": "They were first trialled in 2017 with 120 sensors along roughly 70 km of large water mains; PUB said it would scale progressively to 1,200 sensors islandwide for leak monitoring by 2021",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd"
      ],
      "supportNote": "The article states leak monitoring sensors were first trialled in 2017 with 120 sensors installed along approximately 70 km of large water mains, and that PUB plans to scale up progressively and deploy 1,200 sensors islandwide for leak monitoring by 2021.",
      "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-8a2d51a9861d53ea",
      "field": "impact",
      "text": "The trial detected 13 leaks over three years across 120 sensors on about 70 km of large mains",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd"
      ],
      "supportNote": "The article states the trial was successful, with the sensors detecting 13 leaks over a three-year period.",
      "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-9e99470bab049fba",
      "field": "impact",
      "text": "In one case in 2018 the sensors flagged a potential leak on a 700 mm main beside a major expressway, and excavation found a 13 mm corrosion hole",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd"
      ],
      "supportNote": "The article describes the 2018 incident: sensors alerted PUB to a potential leak on a 700 mm diameter water pipe alongside a major expressway, and excavation revealed a 13 mm corrosion hole.",
      "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-2cfeb651fed44d11",
      "field": "lesson",
      "text": "nothing in the record here measures what the grid added to it",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd",
       "src-8ae1b07de4798dcf",
       "src-2fb4ca943c41eb65"
      ],
      "supportNote": "None of the three sources compares water loss before and after the sensor deployment or isolates the grid's contribution.",
      "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-25367ea8344308f3",
      "field": "lesson",
      "text": "the trade article that carries every figure in this entry is published by PUB itself",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd"
      ],
      "supportNote": "The article's own byline names PUB, Singapore's National Water Agency as the publishing partner organisation.",
      "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-8168efa76cd2a5b8",
      "field": "lesson",
      "text": "no source confirms whether the 1,200-sensor target set for 2021 was reached",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f15a584e6a4e52fd",
       "src-8ae1b07de4798dcf"
      ],
      "supportNote": "The 2020 article states the target; neither it nor the agency site reports the deployment actually achieved.",
      "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-2fb4ca943c41eb65",
      "title": "Smart Water (Springer, peer-reviewed) — Singapore water management",
      "url": "https://link.springer.com/article/10.1186/s40713-016-0004-4",
      "publisher": {
       "name": null,
       "domain": "link.springer.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-2cfeb651fed44d11"
      ],
      "temporal": {
       "publishedAt": null,
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-07-17",
       "dossierCreatedAt": "2026-08-27",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "A journal article on Singapore water management; the full text is not openly readable. The page states no publication date.",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-f15a584e6a4e52fd",
      "title": "Smart Water Magazine (trade) — PUB adopts smart tools to detect and pre-empt pipe leaks (content published by PUB)",
      "url": "https://smartwatermagazine.com/news/pub-singapores-national-water-agency/pub-adopts-smart-tools-detect-and-pre-empt-pipe-leaks",
      "publisher": {
       "name": null,
       "domain": "smartwatermagazine.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-7c6ef7a118476803",
       "clm-9f165182c708b858",
       "clm-7c4b185d52555bde",
       "clm-8a2d51a9861d53ea",
       "clm-9e99470bab049fba",
       "clm-2cfeb651fed44d11",
       "clm-25367ea8344308f3",
       "clm-8168efa76cd2a5b8"
      ],
      "temporal": {
       "publishedAt": "2020-11-12",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-07-17",
       "dossierCreatedAt": "2026-08-27",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Leak sensors: 120 units on ~70km of mains from 2017, scaling to 1,200 islandwide, ~3m location accuracy.",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-8ae1b07de4798dcf",
      "title": "PUB, Singapore's National Water Agency (authority)",
      "url": "https://www.pub.gov.sg/",
      "publisher": {
       "name": null,
       "domain": "pub.gov.sg",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-7c6ef7a118476803",
       "clm-2cfeb651fed44d11",
       "clm-8168efa76cd2a5b8"
      ],
      "temporal": {
       "publishedAt": null,
       "updatedAt": "2026-03-16",
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-07-17",
       "dossierCreatedAt": "2026-08-27",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "The agency's own site, used as the reference for the Smart Water Grid programme. The page carries no publication date, only a last update of 16 March 2026.",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     }
    ],
    "coverage": {
     "claimsTotal": 8,
     "claimsMapped": 8,
     "sourcesTotal": 3,
     "sourcesUsedByClaims": 3,
     "sourcesWithPublicationDate": 1,
     "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."
    ]
   }
  }
 ]
}