{
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 "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": "berlin-siemensstadt-square",
  "title": "Siemensstadt Square (Siemensstadt 2.0)",
  "canonicalUrl": "https://1001smartcities.org/projects/berlin-siemensstadt-square/"
 },
 "currentRevisionId": "2026-08-21-evidence-baseline",
 "revisions": [
  {
   "id": "2026-08-21-evidence-baseline",
   "createdAt": "2026-08-22T09:08:00Z",
   "effectiveAt": "2026-07-25",
   "changeType": "baseline",
   "summary": "Created the first structured Evidence Passport with 11 claims and 4 source dossiers.",
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   },
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    "by": null,
    "date": null,
    "note": "Awaiting operator and domain-expert review; publication of this revision implies neither."
   },
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    {
     "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."
    }
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    "asOf": "2026-07-25",
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    "assurance": {
     "status": "unreviewed",
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     "statement": "AI-assisted structural preparation. This revision has not been reviewed by a human or subject-matter expert.",
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      "publication-diff-contract",
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    },
    "projectState": {
     "status": "construction",
     "outcome": "ongoing",
     "evidenceGrade": "official",
     "timeline": {
      "started": 2018,
      "ended": 2035
     }
    },
    "governance": {
     "operator": "Siemens",
     "actorTypes": [
      "private"
     ],
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     "fundingDescription": null,
     "cost": null,
     "ownership": null,
     "decisionRights": null,
     "exitConditions": null
    },
    "claims": [
     {
      "id": "clm-3c2283f16380dbe4",
      "field": "snippet",
      "text": "Siemens is redeveloping its century-old Siemensstadt production site in Berlin-Spandau",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-ba5f6b91e73058f8",
       "src-d38611c5b6bb1013"
      ],
      "supportNote": "The Siemens release on the masterplan competition says the company is redesigning \"Siemensstadt (“Siemens City”), the company’s historic location in Berlin\" and describes it as \"the currently closed-off industrial park – which covers an area of some 70 hectares or about 100 football fields in the Spandau district of Berlin\", at the place \"where the cornerstone of the original Siemensstadt was laid in 1897\". RCR Wireless adds that the quarter was \"originally settled ... as a new industrial quarter by Siemens & Halske, a forebear of today’s Siemens\", and quotes the German chancellor calling it a place of new beginnings \"for 125 years\".",
      "caveat": "RCR Wireless misdates the founding to \"the end of the 20th century\"; the 1897 cornerstone date comes from Siemens' own account of its site.",
      "interpretation": {
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       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
      "id": "clm-eec5cf21bda639cc",
      "field": "snippet",
      "text": "into a mixed-use \"smart district\"",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-ba5f6b91e73058f8"
      ],
      "supportNote": "The same Siemens release says the industrial park is to be developed \"into a modern multipurpose “smart district.”\" and that \"Siemensstadt 2.0 will be a carbon-neutral “smart district” bridging the boundaries between the traditionally separate areas of research, technology and innovation and interlinking workplaces, production facilities and housing.\"",
      "caveat": "\"Smart district\" is Siemens' own designation for the scheme, used in its announcement, not a description by an outside body.",
      "interpretation": {
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       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
      "id": "clm-d5137e83c18f6788",
      "field": "snippet",
      "text": "for roughly 35,000 residents and workers",
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      "supportNote": "RCR Wireless reports: \"The plan is to create a business and residential district for around 35,000 people, with new homes for 7,000 people (30 percent of the space will be social housing) and new jobs for 20,000 people.\"",
      "caveat": "The figure is a Siemens projection for a district still under construction, not a count. The two components given in the same sentence — homes for 7,000 people and 20,000 jobs — add up to 27,000, so the reported total is not explained by its own parts.",
      "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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     {
      "id": "clm-f2b4b720e8174c1c",
      "field": "snippet",
      "text": "across about 76 hectares",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "Siemens' topping-out release of 29 June 2026 refers to \"the 76-hectare site in Berlin’s Spandau district\", and the Smart Cities World standfirst reads \"Spanning an area of 76 hectares, Siemensstadt Square is set to be one of Europe’s largest urban redevelopment sites\". RCR Wireless, also listed here, gives a different measure for the same project — \"The new site will cover 270,000 square metres\", i.e. 27 hectares — without saying whether this is the new-build footprint or the whole estate.",
      "caveat": "The 2020 Siemens announcement described the estate as \"some 70 hectares\"; 76 hectares is the figure used since the 2024 launch. Only the standfirst of the Smart Cities World article is readable without registering.",
      "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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     {
      "id": "clm-c7352d8e0e0bf5d0",
      "field": "snippet",
      "text": "investing €750M",
      "statementKind": "quantitative",
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      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "RCR Wireless: \"Siemens is to invest €750 million of its own money over the next decade to make Siemensstadt Square in the Spandau district of the German capital ... into a new model for the so-called fourth industrial revolution\", and \"The €750 million Siemens has earmarked for the project is its largest-ever single investment in Berlin.\"",
      "caveat": "The sum is Siemens' own announcement at the 2024 launch, repeated by the trade press. No listed source reports how much of it has been spent, and the company's own release of June 2026 gives no investment figure at all.",
      "interpretation": {
       "added": false,
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       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
      "id": "clm-55e3ac7ed85052e6",
      "field": "snippet",
      "text": "of a planned total of up to €4.5bn",
      "statementKind": "quantitative",
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      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-d38611c5b6bb1013"
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      "supportNote": "RCR Wireless opens: \"Siemens has heralded a new €4.5 billion smart city regeneration project in Berlin as a “global blueprint” for urban brownfield development and industrial transformation\", and carries the figure in its headline.",
      "caveat": "The article gives €4.5bn as the announced project total at the 2024 launch and attaches no completion year to it; it says only that Siemens' own €750m runs \"over the next decade\".",
      "interpretation": {
       "added": false,
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       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
      "id": "clm-2f7c499b21dbc012",
      "field": "snippet",
      "text": "Planning runs on digital twins and IoT via the Siemens Xcelerator platform",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-d38611c5b6bb1013",
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      "supportNote": "RCR Wireless: \"Siemens is to draw on technologies from its partners, as collected in its Xcelerator platform. The key to the proposition is a multi-sided digital twin that captures “all levels of the city”\", and it names three of them — a campus twin built with Bentley Systems and described as a \"digital real-time master plan\", a building twin in Siemens' Building X suite, and an energy twin used \"with data analysis and artificial intelligence (AI), to generate forecasts and monitor supply variants\". The Smart Cities World standfirst says \"technology from Siemens Xcelerator portfolio will form the backbone of the new neighbourhood in Berlin Spandau.\"",
      "caveat": "Neither source itemises an IoT deployment; both describe digital twins and a software platform, and both accounts date from the June 2024 launch and rest on Siemens' own descriptions of its own products. Siemens' June 2026 release mentions building information modelling and digital twins for planning and construction without naming Xcelerator.",
      "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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     {
      "id": "clm-f3b66162fa06a6f8",
      "field": "snippet",
      "text": "a large wastewater heat exchanger with heat pumps is meant to deliver carbon-neutral heating and cooling",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "RCR Wireless: \"Siemens is working with Berliner Wasserbetriebe, the city’s water utility, to install Europe’s largest wastewater heat exchanger (“of its type”). The district emits 3,000 tons of carbon dioxide per year; the new system will combine with heat pumps to supply the district with 100 percent carbon-neutral heating and cooling in 2026.\" Siemens' own June 2026 release describes \"a climate-neutral energy supply from its own local heating and cooling network, featuring Europe’s largest wastewater heat exchanger\".",
      "caveat": "The 2024 account expected the carbon-neutral supply to be delivering in 2026; the Siemens release of June 2026 still describes it in forward-looking terms and does not say it is in service. Heat pumps are named only in the 2024 trade-press account, which attributes the description to Siemens.",
      "interpretation": {
       "added": false,
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       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
      "id": "clm-928471283724262c",
      "field": "snippet",
      "text": "Announced as \"Siemensstadt 2.0\" in 2018",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-ba5f6b91e73058f8"
      ],
      "supportNote": "The Siemens release states: \"In October 2018, Siemens first announced its intention to redesign Siemensstadt and develop the currently closed-off industrial park ... into a modern multipurpose “smart district.”\", and that the urban development competition that followed \"was entitled “Siemensstadt 2.0.”\"",
      "caveat": "The 2018 announcement carried a much smaller commitment: the same release quotes Siemens' CFO saying \"Siemens AG will invest up to €600 million here\", against the €750m announced at the 2024 launch.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-71510f84324ae2c2",
      "field": "snippet",
      "text": "with a June 2024 groundbreaking",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-d38611c5b6bb1013",
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      ],
      "supportNote": "RCR Wireless, published 1 July 2024, reports: \"The project was officially opened last week at a ceremony with the German chancellor, Olaf Scholz, and the mayor of Berlin, Kai Wegner\", and that \"construction of new buildings starts from now (“construction phase for Module 1”)\". Siemens' release of 29 June 2026 dates the same event by saying \"Two years after the foundation stone was laid, Siemens has reached an important milestone ... with the topping-out ceremony\".",
      "caveat": null,
      "interpretation": {
       "added": false,
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       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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      "field": "snippet",
      "text": "the district is still under construction",
      "statementKind": "descriptive",
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      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "Siemens' release of 29 June 2026 marks the topping-out of the first two new buildings, not their completion: \"The shell construction of the first new buildings has been completed on schedule and they’ll be finished within the planned time and investment framework.\" The atrium building is \"scheduled for completion at the start of 2027\" and the roughly 60-metre high-rise \"at the start of 2028\", while \"Currently, several hundred people are working daily\" on the site.",
      "caveat": null,
      "interpretation": {
       "added": false,
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       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
      "id": "src-48e96c731fcdcd97",
      "title": "Siemens — Topping-out ceremony for Siemensstadt Square (press release)",
      "url": "https://press.siemens.com/global/en/pressrelease/siemens-celebrates-topping-out-ceremony-new-siemensstadt-square-urban-district-berlin",
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       "domain": "press.siemens.com",
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      "temporal": {
       "publishedAt": "2026-06-29",
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       "type": "descriptive-source-note",
       "value": "Operator/developer primary source: €750M Siemens investment, up to €4.5bn total by 2035, ~3,750 apartments, first buildings complete autumn 2026, carbon-neutral heating/cooling via wastewater heat exchanger + heat pumps.",
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     {
      "id": "src-d38611c5b6bb1013",
      "title": "RCR Wireless — Siemens hails €4.5bn Berlin smart-city 'blueprint'",
      "url": "https://www.rcrwireless.com/20240701/internet-of-things/siemens-hails-global-smart-city-blueprint-as-e4-5bn-berlin-project-kicks-off",
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       "publishedAt": "2024-07-01",
       "updatedAt": null,
       "sourceCheckedAt": null,
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       "dossierCreatedAt": "2026-08-22",
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       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Independent tech press on the June 2024 groundbreaking: ~76 ha / 188 acres, ~35,000 residents and workers, AI/digital-twin/IoT via Siemens Xcelerator, €4.5bn total investment.",
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      },
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     {
      "id": "src-3f506897e332e6d7",
      "title": "Smart Cities World — Siemensstadt Square: blueprint for the city of the future?",
      "url": "https://www.smartcitiesworld.net/digital-twins/siemensstadt-square-blueprint-for-the-city-of-the-future",
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       "domain": "smartcitiesworld.net",
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      "temporal": {
       "publishedAt": "2024-06-27",
       "updatedAt": null,
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      },
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       "type": "descriptive-source-note",
       "value": "Independent smart-cities trade press covering the digital-twin / energy-twin approach and the still-forward-looking nature of the smart-district features.",
       "exact": false
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     {
      "id": "src-ba5f6b91e73058f8",
      "title": "O&O Baukunst wins urban-planning competition for new Siemensstadt (Siemens press)",
      "url": "https://press.siemens.com/global/en/pressrelease/winning-design-urban-planning-new-siemensstadt",
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       "domain": "press.siemens.com",
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      "temporal": {
       "publishedAt": "2020-01-08",
       "updatedAt": null,
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       "recordLastVerifiedAt": "2026-07-25",
       "dossierCreatedAt": "2026-08-22",
       "retrievedAt": null,
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      "locator": {
       "type": "descriptive-source-note",
       "value": "Confirms 2018 'Siemensstadt 2.0' announcement (~€600M initial commitment) and the Ortner & Ortner (O&O Baukunst) masterplan competition win — origin/yearStart context.",
       "exact": false
      },
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    "coverage": {
     "claimsTotal": 11,
     "claimsMapped": 11,
     "sourcesTotal": 4,
     "sourcesUsedByClaims": 4,
     "sourcesWithPublicationDate": 4,
     "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."
    ]
   }
  }
 ]
}