Permanent project revision

Yokohama Open Data Portal

Revision 2026-08-18-baseline · effective 2026-08-18

Superseded. A later revision exists: 2026-08-20-source-dates-b8 →

unreviewed

Created the first structured Evidence Passport with 3 claims and 2 source dossiers.

sha256:b8d18a53c81e240063041c2ae9b00047e2cbe9e4681afe5512a2a996cba936a8

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.

3: of 3 claims mapped
2: 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-9ed2c3d764895104 quantitative

all 654 datasets carry a Creative Commons Attribution licence and none is left without one

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: 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: No claim-specific caveat recorded

Sources carrying this claim

Yokohama Open Data Portal — package_search API with licence facet

Claim 2 clm-e8961e1e8ea2167d quantitative

The catalogue records themselves were created from March 2024

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: 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.

Sources carrying this claim

Yokohama Open Data Portal — package_search API with licence facet

Claim 3 clm-7d6997ccbc6a1c2f quantitative

654 of 654 datasets licensed CC BY, with zero unlicensed records

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: Same facet query: total count 654, single licence facet CC BY with count 654, so the unlicensed remainder is zero.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Yokohama Open Data Portal — package_search API with licence facet

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 2026-08-18-baseline effective 2026-08-18 · created 2026-08-18

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

sha256:b8d18a53c81e240063041c2ae9b00047e2cbe9e4681afe5512a2a996cba936a8

Revision history → Permanent version link → Machine-readable record → Evidence Constitution →

3: of 3 claims mapped
2: source dossiers
0: publication dates recorded
0: archives linked
0: exact locators
0: content captures hashed

Governance facts carried by the record

Operator: City of Yokohama
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

2 source dossiers

Yokohama Open Data Portal data.city.yokohama.lg.jp · background

Open original source ↗

Stable source ID: src-1186467a365b7287
Publisher: Name not classified · data.city.yokohama.lg.jp
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-18
Dossier created: 2026-08-18
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: No locator recordedDescriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

Yokohama Open Data Portal — package_search API with licence facet data.city.yokohama.lg.jp · 3 linked claims

Open original source ↗

Stable source ID: src-94e9c413801a82ee
Publisher: Name not classified · data.city.yokohama.lg.jp
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-18
Dossier created: 2026-08-18
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: No locator recordedDescriptive only — not page/paragraph exact
Claims linked: clm-9ed2c3d764895104
clm-e8961e1e8ea2167d
clm-7d6997ccbc6a1c2f

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.