1001 Smart Cities

Permanent project revision

Open Data Zürich: CC0 Government Data Catalogue

Revision 2026-08-26-p1-quality-uplift · effective 2026-08-26

Superseded. A later revision exists: 2026-08-27-source-dating →

unreviewed

Created the first structured Evidence Passport with 7 claims and 5 source dossiers.

sha256:3ece4c0b93da0d5fb1dd2df252ef21fb76714865f3c46e00ffa3e7fc87a9ee67
All revisions → Current entity page →

Change set

  • add /evidencePassport — Added claim-level evidence mapping and source dossiers.
  • add /revisionHistory — Established a permanent, hash-addressed baseline revision.
7
of 7 claims mapped
5
source dossiers
0
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Claims, one by one

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-ea52379ab32d8178 quantitative
Zurich opened Switzerland's first open-government-data portal in June 2012
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The city's own framework page dates the portal's opening, and the trade coverage is headed on Zurich as Switzerland's open-data pioneer.
Caveat
The 'first in Switzerland' claim rests on the city's own framing and the trade press headline; no independent register of Swiss portal launch dates was consulted for this entry.

Sources carrying this claim

  1. Stadt Zürich — Open Government Data (framework)
  2. Kommune21 — Schweizer Open-Data-Pionier
Claim 2 clm-4d010b2c37953da2 quantitative
data.stadt-zuerich.ch lists 937 datasets, and every one carries a licence: 908 are CC0 public-domain dedications, the rest CC BY or CC BY-SA
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The counts are read directly from the catalogue's own licence facet, which returns the number of datasets per licence id, and sum to the catalogue total.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Open Data Zürich — CKAN licence facet (API)
  2. Open Data Zürich — data catalogue
Claim 3 clm-049101ec5146ce1f quantitative
A 2021 city-council decision made 'open by default' binding
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim from the city: 'Mit dem Stadtratsbeschluss 741/2021 gilt seit dem 1. September 2021 in der Stadt Zuerich fuer OGD das Prinzip «Open by Default» als verbindlich.'
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Stadt Zürich — Open Government Data (framework)
Claim 4 clm-5d92c2183a8fc456 descriptive
Community developers now expose the catalogue to AI assistants through three open-source MCP servers
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The city's own page on the community-built servers that make the OGD catalogue queryable by AI assistants.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Stadt Zürich — MCP servers for the OGD catalogue
Claim 5 clm-11fc4ab471682808 quantitative
937 datasets, all licensed: 908 CC0, 16 CC BY-SA, 13 CC BY (portal API, July 2026)
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The four numbers are the catalogue's own licence facet counts as returned by the CKAN API, and they sum exactly to the catalogue total - which is the point of the claim: there is no unlicensed remainder.
Caveat
A count taken from the live catalogue in July 2026; it moves as the catalogue grows.

Sources carrying this claim

  1. Open Data Zürich — CKAN licence facet (API)
Claim 6 clm-0be5e3b030b08c58 quantitative
Zurich's catalogue opened in June 2012, and open by default only became binding with city council decision 741/2021, in force from 1 September 2021
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The city's framework page carries both dates: the portal's opening and the council decision that made the principle binding from 1 September 2021.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Stadt Zürich — Open Government Data (framework)
Claim 7 clm-675f01a18449eda6 descriptive
every dataset in it carries a licence, and almost all of them the most permissive one there is
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The licence facet returns a count for every dataset in the catalogue with no unlicensed bucket, and the largest count by far is CC0, a public-domain dedication.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Open Data Zürich — CKAN licence facet (API)

Source dossiers and revision state

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-26-p1-quality-uplift effective 2026-08-26 · created 2026-08-26

Awaiting operator and domain-expert review; publication of this revision implies neither.

Erratum on this revision's envelope. The snapshot, its hash and its permanent link are untouched.

  • createdAt previously read 2026-08-26T16:07:00Z. The batching script that produced this revision advanced createdAt into the future to satisfy the strictly-increasing order the validator requires per entity. The value never recorded a real event; the corrected value is the moment the revision provably existed in the repository. Corrected to 2026-08-26T14:11:55Z on 2026-08-27; evidence: first appears in commit 5fac751ec9, committed 2026-08-26T14:11:55Z.
sha256:3ece4c0b93da0d5fb1dd2df252ef21fb76714865f3c46e00ffa3e7fc87a9ee67
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
7
of 7 claims mapped
5
source dossiers
0
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Statistik Stadt Zürich (Open Data Zürich)
Actor types
city-government
Funding model
public
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

5 source dossiers

Open Data Zürich — data catalogue data.stadt-zuerich.ch · 1 linked claim

Open original source ↗

Stable source ID
src-550c250afbfa68b2
Publisher
Name not classified · data.stadt-zuerich.ch
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The catalogue itself. A live portal with no publication date.

Descriptive only — not page/paragraph exact
Claims linked
Open Data Zürich — CKAN licence facet (API) data.stadt-zuerich.ch · 3 linked claims

Open original source ↗

Stable source ID
src-8996700761a35724
Publisher
Name not classified · data.stadt-zuerich.ch
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The catalogue's own licence facet, queried directly, which is where the licence counts come from. A live API with no publication date.

Descriptive only — not page/paragraph exact
Claims linked
Stadt Zürich — Open Government Data (framework) stadt-zuerich.ch · 3 linked claims

Open original source ↗

Stable source ID
src-6e97149a7aa96908
Publisher
Name not classified · stadt-zuerich.ch
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The city's framework page, which states the council decision that made open by default binding and the date it took effect. A standing page with no publication date.

Descriptive only — not page/paragraph exact
Claims linked
Stadt Zürich — MCP servers for the OGD catalogue stadt-zuerich.ch · 1 linked claim

Open original source ↗

Stable source ID
src-4b7d55fd963d7e76
Publisher
Name not classified · stadt-zuerich.ch
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The city's page on the community-built servers that expose the catalogue to AI assistants. No publication date is shown.

Descriptive only — not page/paragraph exact
Claims linked
Kommune21 — Schweizer Open-Data-Pionier kommune21.de · 1 linked claim

Open original source ↗

Stable source ID
src-2fcb6c6d3a4d3b2b
Publisher
Name not classified · kommune21.de
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Trade coverage of Zurich as Switzerland's open-data pioneer. No publication date could be read from the page.

Descriptive only — not page/paragraph exact
Claims linked
Known limits of this passport
  • 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.