{"id":"7f772feb-e4f2-44be-a336-e302821a4104","type":"API","name":"DCAT-AP API endpoints for data.public.lu","slug":"dcat-ap-api-endpoints-for-datapubliclu-1","description":"Data.public.lu provides all its metadata in the DCAT and DCAT-AP formats, i.e. all data about the data stored or referenced on data.public.lu. DCAT (Data Catalog Vocabulary) is a specification designed to facilitate interoperability between data catalogs published on the Web. This specification has been extended via the DCAT-AP (DCAT Application Profile for data portals in Europe) standard, specifically for data portals in Europe. The serialisation of those vocabularies is mainly done in RDF (Resource Description Framework). The implementation of data.public.lu is based on the one of the open source udata platform. This API enables the federation of multiple Data portals together, for example, all the datasets published on data.public.lu are also published on data.europa.eu. The DCAT API from data.public.lu is used by the european data portal to federate its metadata. The DCAT standard is thus very important to guarantee the interoperability between all data portals in Europe. Usage Full catalog You can find here a few examples using the curl command line tool: To get all the metadata from the whole catalog hosted on data.public.lu `` curl https://data.public.lu/catalog.rdf ` Metadata for an organization To get the metadata of a specific organization, you need first to find its ID. The ID of an organization is the last part of its URL. For the organization \"Open data Lëtzebuerg\" its URL is https://data.public.lu/fr/organizations/open-data-letzebuerg/ and its ID is open-data-letzebuerg. To get all the metadata for a given organization, we need to call the following URL, where {id} has been replaced by the correct ID: https://data.public.lu/api/1/organizations/{id}/catalog.rdf Example: `` curl.","free_access_class":"FREE_NO_AUTH","auth_type":"NONE","homepage_url":null,"docs_url":null,"repo_url":"https://data.public.lu/catalog.rdf","status":"ACTIVE","verification_state":"VERIFIED","tags":[],"logo_url":"https://www.google.com/s2/favicons?sz=64&domain=data.public.lu","primary_source_url":"https://data.public.lu/catalog.rdf","extraction_confidence":"0.16","created_at":"2026-07-29T13:28:37.928Z","updated_at":"2026-10-12T20:48:49.057Z","last_verified_at":"2026-10-12T17:41:43.990Z","deprecated_at":null,"ranking_score":34,"last_ranked_at":"2026-09-30T19:53:21.183Z","last_seen_at":null,"last_validated_at":null,"last_uptime_at":null,"search_vector":"'/api/1/organizations/':269B,647B '/catalog.rdf':190B,271B,568B,649B '/fr/organizations/open-data-letzebuerg/':233B,611B 'a':415B,544B,578B,626B,677B,730B 'about':402B 'across':363B,741B 'all':388B,400B,493B,532B,555B,622B,713B 'allow':325B 'allows':703B 'also':122B,500B 'an':571B,591B 'and':394B,612B,667B,746B,750B 'ap':3A,19B,59B,292B,310B,381A,397B,437B,670B,688B 'api':4A,104B,128B,275B,324B,382A,482B,506B,653B,702B 'applic':61B 'application':439B 'are':499B 'as':673B 'autom':370B 'automated':748B 'base':93B 'based':471B 'been':431B,639B 'between':421B,531B 'built':315B,693B 'by':511B,641B,685B,734B 'call':254B,632B 'can':541B,719B 'catalog':34B,45B,161B,183B,279B,304B,345B,412B,539B,561B,657B,682B,723B 'catalog.rdf':348B,726B 'catalogs':423B 'command':172B,550B 'correct':265B,643B 'curl':171B,187B,273B,549B,565B,651B 'data':23B,26B,33B,44B,64B,71B,110B,136B,155B,226B,240B,285B,303B,313B,366B,401B,404B,411B,422B,442B,449B,488B,514B,533B,604B,618B,663B,681B,691B,744B 'data.europa.eu':125B,332B,503B,710B 'data.public.lu':7A,8B,31B,91B,120B,130B,186B,189B,232B,268B,281B,339B,385A,386B,409B,469B,498B,508B,564B,567B,610B,646B,659B,717B 'data.public.lu/api/1/organizations/':267B,645B 'data.public.lu/catalog.rdf':188B,566B 'data.public.lu/fr/organizations/open-data-letzebuerg/':231B,609B 'dataset':117B,336B,378B 'datasets':495B,714B,756B 'dcat':2A,15B,18B,32B,58B,60B,127B,143B,288B,291B,297B,309B,380A,393B,396B,410B,436B,438B,505B,521B,666B,669B,675B,687B 'dcat-ap':1A,17B,57B,290B,308B,379A,395B,435B,668B,686B 'descript':86B 'description':464B 'design':39B 'designed':417B 'done':82B,460B 'e.g':346B,724B 'enabl':105B,331B 'enables':483B 'enabling':709B 'endpoint':5A 'endpoints':383A 'europ':67B,74B,158B 'europe':445B,452B,536B 'european':135B,312B,364B,513B,690B,742B 'exampl':114B,168B,272B 'example':492B,650B 'examples':546B 'expos':276B 'exposes':654B 'extend':54B,306B 'extended':432B,684B 'facilit':41B 'facilitate':419B 'feder':107B,139B,326B 'federate':517B 'federation':485B,704B 'few':545B 'find':164B,207B,542B,585B 'first':205B,583B 'follow':256B 'following':634B 'for':384A,441B,448B,491B,570B,600B,625B,680B,689B,729B 'format':20B,293B 'formats':398B,671B 'framework':87B,465B 'from':507B,558B 'full':160B,344B,538B,722B 'get':176B,196B,243B,554B,574B,621B 'given':249B,627B 'guarante':150B 'guarantee':528B 'harvest':334B,371B,712B 'harvesting':749B 'has':430B,638B 'here':543B 'host':184B 'hosted':562B 'i.e':21B,399B 'id':209B,211B,236B,259B,266B,270B,357B,587B,589B,614B,637B,644B,648B,735B 'implement':89B 'implementation':467B 'import':148B 'important':526B 'in':391B,444B,451B,461B,535B,665B 'infrastructur':367B 'infrastructure':745B 'interfac':360B 'interface':738B 'interoper':42B,152B,305B,362B 'interoperability':420B,530B,683B,740B 'is':414B,458B,470B,509B,523B,593B,608B,615B,676B 'its':389B,518B,586B,598B,606B,613B 'last':217B,595B 'letzebuerg':241B,605B,619B 'line':173B,551B 'luxembourg':282B,375B,660B,753B 'lëtzebuerg':227B 'main':81B 'mainly':459B 'metadata':12B,141B,179B,191B,198B,246B,278B,350B,390B,519B,557B,569B,576B,624B,656B,728B 'multipl':109B 'multiple':487B 'need':204B,252B,582B,630B 'notabl':330B 'notably':708B 'of':455B,468B,475B,486B,577B,590B,597B,658B,752B 'on':408B,425B,472B,497B,502B,563B,694B,716B 'one':96B,474B 'open':99B,225B,239B,284B,319B,365B,477B,603B,617B,662B,697B,743B 'open-data-letzebuerg':238B,616B 'open-sourc':318B 'open-source':696B 'or':406B,727B 'organ':194B,202B,214B,224B,250B,355B 'organization':572B,580B,592B,602B,628B,733B 'other':706B 'part':218B,596B 'platform':102B,322B,480B,700B 'portal':65B,72B,111B,137B,156B,286B,314B,329B,515B,664B 'portals':443B,450B,489B,534B,692B,707B 'profil':62B 'profile':440B 'provid':9B 'provides':387B 'public':377B,755B 'publish':46B,118B,123B,337B,354B 'published':424B,496B,501B,715B 'publishing':732B 'rdf':84B,296B,462B,674B 'referenc':29B 'referenced':407B 'replac':262B 'replaced':640B 'resourc':85B 'resource':463B 'retriev':342B 'retrieve':720B 'reus':373B 'reuse':751B 's':661B,754B 'serialis':76B,294B 'serialisation':454B 'serialised':672B 'sourc':100B,320B 'source':478B,698B 'specif':38B,51B,69B,201B,353B 'specific':579B,731B 'specifically':447B 'specification':416B,429B 'standard':68B,144B,446B,522B 'standardis':359B 'standardised':737B 'store':27B 'stored':405B 'support':369B 'supports':747B 'the':392B,403B,426B,434B,453B,466B,473B,476B,484B,494B,504B,512B,520B,529B,548B,556B,559B,575B,588B,594B,601B,623B,633B,642B,655B,695B,701B,721B 'this':428B,481B,652B,736B 'those':456B 'thus':146B,524B 'to':418B,516B,527B,553B,573B,584B,620B,631B,711B 'togeth':112B 'together':490B 'tool':174B,552B 'udata':101B,321B,479B,699B 'underpin':361B 'underpins':739B 'url':221B,229B,257B,599B,607B,635B 'usag':159B 'usage':537B 'use':132B,169B 'used':510B 'user':340B 'users':718B 'using':547B 'very':525B 'via':55B,347B,433B,725B 'vocabulari':35B,79B,301B 'vocabularies':457B 'vocabulary':413B,679B 'w3c':300B,678B 'we':629B 'web':49B,427B 'where':636B 'whole':182B,560B 'with':705B 'you':540B,581B","popularity_score":"0.0000","maintenance_score":"0.5000","institution_id":null,"institution_type":null,"country_code":null,"official_confidence":null,"proof_summary":null,"source_seed_url":null,"is_public_sector":true,"published_at":"2026-07-30T11:03:01.656Z","geographic_scope":"NATIONAL","name_en":null,"description_en":"This API exposes the metadata catalog of data.public.lu, Luxembourg's open data portal, in DCAT and DCAT-AP formats, serialised as RDF. DCAT is a W3C vocabulary for data catalog interoperability, extended by DCAT-AP for European data portals. Built on the open-source udata platform, the API allows federation with other portals, notably enabling data.europa.eu to harvest all datasets published on data.public.lu. Users can retrieve the full catalog (e.g. via catalog.rdf) or metadata for a specific publishing organization by ID. This standardised interface underpins interoperability across European open data infrastructure and supports automated harvesting and reuse of Luxembourg's public datasets.","native_lang":"en","access_level":"direct","formats":[],"capability_tier":"reference","trust_score":35.83333333333333,"merged_into_entry_id":null,"identity_key":"API|https://data.public.lu/catalog.rdf|dcat-ap api endpoints for data.public.lu","upstream_ref":null,"content_changed_at":null,"title_qualifier":"data.public.lu","access":{"level":"direct","primary":{"kind":"query","label":"Run verified request","method":"GET","url":"https://data.public.lu/catalog.rdf","source":"probe","runnable":true},"actions":[{"kind":"query","label":"Run verified request","method":"GET","url":"https://data.public.lu/catalog.rdf","source":"probe","runnable":true}],"formats":[]},"maturity":{"entry_id":"7f772feb-e4f2-44be-a336-e302821a4104","granularity":"entry","granularity_label":"One unit = one catalog entry. A PROXY for the SCOPE.md §4 ladder, which governs source families, not entries: a family with 400 entries moves this reading 400 times as much as a family with one. Never compare or combine with the source_family reading.","level":"verified","level_index":2,"level_label":"Verified","meaning":"Access tested successfully","counts_as_coverage":false,"blocked_by":null,"rungs":[{"level":"discovered","level_index":1,"label":"Discovered","meaning":"Source and metadata recorded","evidence":"membership of the named population the ladder is taken over","counts_as_coverage":false,"met":true,"reached":true,"criterion":"TRUE"},{"level":"verified","level_index":2,"label":"Verified","meaning":"Access tested successfully","evidence":"entries.verification_state = 'VERIFIED'","counts_as_coverage":false,"met":true,"reached":true,"criterion":"entries.verification_state = 'VERIFIED'"},{"level":"profiled","level_index":3,"label":"Profiled","meaning":"Schema, dimensions and licence understood","evidence":"a data profile with at least one field (entry_data_profiles.field_count > 0)","counts_as_coverage":false,"met":false,"reached":false,"criterion":"EXISTS (SELECT 1 FROM entry_data_profiles p WHERE p.entry_id = entries.id AND COALESCE(p.field_count, 0) > 0)"},{"level":"executable","level_index":4,"label":"Executable","meaning":"Queries run through Commodity","evidence":"entries.capability_tier = 'live' — today's proxy for \"queryable through us\"","counts_as_coverage":true,"met":false,"reached":false,"criterion":"entries.capability_tier = 'live'"},{"level":"joinable","level_index":5,"label":"Joinable","meaning":"Canonical identifiers and concepts mapped","evidence":"a field link to a canonical identifier whose sampled VALUES match its format","counts_as_coverage":true,"met":false,"reached":false,"criterion":"EXISTS (SELECT 1 FROM entry_field_links efl WHERE efl.entry_id = entries.id AND efl.identifier_id IS NOT NULL AND efl.value_status = 'match')"},{"level":"reproducible","level_index":6,"label":"Reproducible","meaning":"Snapshots and transformation evidence retained","evidence":"at least one retained evidence manifest (migration 078)","counts_as_coverage":true,"met":false,"reached":false,"criterion":"EXISTS (SELECT 1 FROM evidence_manifests em WHERE em.entry_id = entries.id)"},{"level":"guaranteed","level_index":7,"label":"Guaranteed","meaning":"Monitored against an operational reliability target","evidence":"an active reliability target with a named monitor (migration 096)","counts_as_coverage":true,"met":false,"reached":false,"criterion":"EXISTS (SELECT 1 FROM entry_reliability_targets rt WHERE rt.entry_id = entries.id AND rt.is_active = true)"}],"officialness":{"basis":"catalog_inherited","label":"Inherited from the upstream catalog: this item came from a trusted official government catalog, and that provenance — not per-item proof — is the warrant. Its own proof score is below 80 or it matched no registered institution (apps/worker/src/connectors/catalog/qualify-store.ts).","proof_confidence":null,"proven_threshold":80,"institution_id":null,"definition":"CASE WHEN COALESCE(entries.is_public_sector, false) IS NOT TRUE THEN 'not_official' WHEN COALESCE(entries.official_confidence, 0) >= 80 AND entries.institution_id IS NOT NULL THEN 'per_item_proven' ELSE 'catalog_inherited' END"},"source_family":{"key":"data.public.lu","label":"One unit = one source family, approximated by the serving host of the entry's primary source URL (e.g. bdl.stat.gov.pl). A COMPUTED stand-in for the curated families of SCOPE.md §5, which no table holds yet. A family sits at the highest level any of its entries has reached, because a family is integrated to the depth of its deepest working integration. Never compare or combine with the entry reading."},"generated_at":"2026-10-12T22:45:36.304Z"},"api_details":null,"dataset_details":null,"license":null,"reuse":{"license_id":null,"license_name":null,"license_url":null,"commercial_use":{"status":"unknown","value":null},"redistribution":{"status":"unknown","value":null},"attribution_required":{"status":"unknown","value":null},"share_alike":{"status":"unknown","value":null},"personal_data_warning":{"status":"unknown","value":null},"cache_and_mirror":{"status":"unknown","value":null},"undetermined":["commercial_use","redistribution","attribution_required","share_alike","personal_data_warning","cache_and_mirror"],"basis":"unverified","confidence":0.1,"confidence_tier":"low","source_text":null,"source_url":null,"reviewed_at":null},"license_raw":null,"latest_check":{"id":"ca88f901-2dee-4b7a-ac2e-b980c02b4ac2","entry_id":"7f772feb-e4f2-44be-a336-e302821a4104","status":"VERIFIED","last_checked_at":"2026-10-12T17:41:43.853Z","p50_latency_ms":4465,"p95_latency_ms":null,"last_error":null,"consecutive_failures":0,"created_at":"2026-07-29T13:32:10.244Z","updated_at":"2026-10-12T17:41:43.853Z","consecutive_successes":27,"probe_url":"https://data.public.lu/catalog.rdf","probe_method":"GET","probe_http_status":200,"probe_content_type":"application/rdf+xml","probe_succeeded_at":"2026-10-12T17:41:43.853Z"},"data_profile":{"id":"43f828f3-478e-4bea-8675-fccef548eddd","entry_id":"7f772feb-e4f2-44be-a336-e302821a4104","profile_source":"none","profile_kind":"dataset","dataset_id":null,"fields":null,"field_count":null,"sample_records":null,"record_count":null,"data_size_bytes":null,"dataset_count":null,"query_examples":null,"status":"unsupported","error_message":"No introspectable source detected (primary URL sniffed: not machine-readable data)","profiled_at":"2026-10-03T11:36:33.130Z","run_id":"9716056c-6afc-4952-b0a4-a2bd15ca4909","created_at":"2026-07-29T13:31:31.143Z","updated_at":"2026-10-03T11:36:33.130Z","license_raw":null,"license_id":null,"consecutive_failure_count":0,"last_error_at":null,"last_error_message":null,"previewable":false,"personal_data":{"status":"none","basis":"no_person_column_cited","grain":"none","allowed":true,"columns":{"direct_identifiers":[],"family_names":[],"given_names":[],"attributes":[],"unresolved_names":[],"measures":[],"entity_identifiers":[]},"publication":null,"publication_evidence":null,"notice":"personal data: no cited column names a natural person (the cited columns are all this reads)"}},"datasets":[],"limits":[],"manifest":{"answer_sha256":"44e9d08ef629ced3620c765eb8667db51d37e4f321a70159a6761ab88bace738","answer_sha256_rule":"sha256 (hex, UTF-8) of JSON.stringify(this body) after deleting the keys listed in manifest.stamped_keys from manifest, and deleting manifest itself if it is then empty. The hash was computed before the stamp existed, so no field of the stamp is inside it.","stamped_keys":["answer_sha256","answer_sha256_rule","stamped_keys","row_count","row_count_basis","live","live_basis","created_at","created_at_basis","durable_citation"],"row_count":8,"row_count_basis":"Objects that are elements of a JSON array anywhere in this body, excluding manifest. Not a claim about which collection is the answer. Largest single collection: maturity.rungs[] (7 rows).","live":true,"live_basis":"This body was produced by executing the request.","created_at":"2026-10-12T22:45:36.347Z","created_at_basis":"When this response body was assembled, deliberately OUTSIDE the hashed bytes so the same answer hashes identically on every request. Not the upstream read time — that is provenance[].retrieved_at. A zone-cached replay carries the assembly time, not your receipt time.","durable_citation":"This manifest is produced at response time and is NOT stored. A durable, replayable citation is persisted only on an explicit cite: GET /api/v1/entries/{id-or-slug}/evidence, or the MCP cite_query tool. Both are entry-scoped, because evidence_manifests is entry-shaped; a domain answer spanning several sources has no single entry and cannot be persisted through that path."}}