Metadata and searchable descriptions collected from public-data providers. The Dataset Viewer exposes the discovery catalogue as a typed JSONL projection; the complete native tables remain in the verified archive. The release passed the explicit policy recorded in quality.json. Passing that policy is not a guarantee of complete provider coverage or source-data accuracy. Structure errors a provider's contract declares permanent are published with the provider's answer, not counted as release defects: The archive open-data-catalogue.tar.gz contains eleven JSONL tables and manifest.json. They retain the catalogue, structures, dimensions, vocabularies, labels, reports, search documents, native…