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Local Data Bank (BDL) subject P3966: yearly territorial series for Poland (voivodship to gmina level), units keyed by TERYT ids.","free_access_class":"FREE_NO_AUTH","auth_type":"NONE","homepage_url":"https://api.stat.gov.pl/Home/BdlApi","docs_url":"https://api.stat.gov.pl/Home/BdlApi","repo_url":null,"status":"ACTIVE","verification_state":"VERIFIED","tags":[],"logo_url":"https://api.stat.gov.pl/Content/images/favicon.ico","primary_source_url":"https://bdl.stat.gov.pl/bdl/dane/podgrup/temat#P3966","extraction_confidence":"0.40","created_at":"2026-07-25T14:43:15.953Z","updated_at":"2026-10-21T16:44:41.613Z","last_verified_at":"2026-10-21T16:00:28.096Z","deprecated_at":null,"ranking_score":58,"last_ranked_at":"2026-10-17T21:00:55.011Z","last_seen_at":null,"last_validated_at":null,"last_uptime_at":"2026-10-14T03:03:59.181Z","popularity_score":"0.0000","maintenance_score":"0.7000","institution_id":"2b3815fc-d28d-444c-b8f1-906ef8cff848","institution_type":"STATISTICS_OFFICE","country_code":"PL","official_confidence":40,"proof_summary":"40% - Official domain (stat.gov.pl)","source_seed_url":null,"is_public_sector":true,"published_at":"2026-07-26T12:20:50.171Z","geographic_scope":"NATIONAL","name_en":null,"description_en":"This API provides access to statistical series on uninhabited dwellings broken down by type of ownership, part of the Local Data Bank (Bank Danych Lokalnych, BDL) maintained by Statistics Poland (GUS). The data falls under the housing economy and municipal infrastructure category, specifically dwelling stock, and is organized as subject P3966. It offers yearly territorial series covering all administrative levels of Poland, from voivodship down to gmina, with units identified using official TERYT territorial codes. The dataset supports analysis of housing vacancy patterns across Polish regions and municipalities.","native_lang":"pl","access_level":"direct","formats":[],"capability_tier":"live","trust_score":58.25,"merged_into_entry_id":null,"identity_key":"API|https://bdl.stat.gov.pl/bdl/dane/podgrup/temat#P3966|uninhabited dwellings by type of ownership","upstream_ref":"bdl.stat.gov.pl:subject:P3966","content_changed_at":null,"institution":null,"title_qualifier":null,"access":{"level":"direct","primary":{"kind":"query","label":"Run verified request","method":"GET","url":"https://bdl.stat.gov.pl/api/v1/subjects/P3966","source":"probe","runnable":true},"actions":[{"kind":"query","label":"Run verified request","method":"GET","url":"https://bdl.stat.gov.pl/api/v1/subjects/P3966","source":"probe","runnable":true},{"kind":"query","label":"Values of one variable across territorial units","method":"GET","url":"https://bdl.stat.gov.pl/api/v1/data/by-variable/1646208?page-size=10&format=json&lang=en","source":"query_example","runnable":true,"direct":false},{"kind":"query","label":"Documentation","method":"GET","url":"https://api.stat.gov.pl/Home/BdlApi","source":"query_example","runnable":true,"direct":false},{"kind":"landing","label":"Open source record","method":"GET","url":"https://bdl.stat.gov.pl/bdl/dane/podgrup/temat#P3966","source":"primary_source","runnable":false}],"formats":[]},"maturity":{"entry_id":"79da40e3-34c8-4d1c-81f8-8ed840ae6dde","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":"executable","level_index":4,"level_label":"Executable","meaning":"Queries run through Commodity","counts_as_coverage":true,"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":true,"reached":true,"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":true,"reached":true,"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":40,"proven_threshold":80,"institution_id":"2b3815fc-d28d-444c-b8f1-906ef8cff848","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":"bdl.stat.gov.pl","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":"2026-10-23T22:54:39.783Z"},"api_details":{"id":"60837a20-f163-4b07-8600-fee26836bb43","entry_id":"79da40e3-34c8-4d1c-81f8-8ed840ae6dde","base_url":"https://bdl.stat.gov.pl/api/v1/subjects/P3966","openapi_url":null,"graphql_url":null,"api_version":null,"spec_format":null,"endpoints_count":null,"endpoints":[],"rate_limit_info":null,"free_tier_limits":null,"ping_url":"https://bdl.stat.gov.pl/api/v1/subjects/P3966","created_at":"2026-07-25T14:43:16.107Z","updated_at":"2026-07-25T14:43:16.107Z"},"dataset_details":null,"license":{"id":"cc-by-4.0","spdx_id":"CC-BY-4.0","name":"Creative Commons Attribution 4.0","url":"https://creativecommons.org/licenses/by/4.0/","is_open":true,"is_redistributable":true,"requires_attribution":true,"category":"cc","notes":null,"created_at":"2026-06-12T16:29:19.729Z"},"reuse":{"license_id":"cc-by-4.0","license_name":"Creative Commons Attribution 4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","commercial_use":{"status":"yes","value":true},"redistribution":{"status":"yes","value":true},"attribution_required":{"status":"yes","value":true},"share_alike":{"status":"no","value":false},"personal_data_warning":{"status":"yes","value":true},"cache_and_mirror":{"status":"yes","value":true},"undetermined":[],"basis":"licence_text","confidence":0.95,"confidence_tier":"high","source_text":"Deed: \"Share - copy and redistribute the material in any medium or format for any purpose, even commercially\" and \"Adapt - remix, transform, and build upon the material for any purpose, even commercially\". Under the following terms: \"Attribution - You must give appropriate credit, provide a link to the license, and indicate if changes were made.\" Notices: \"other rights such as publicity, privacy, or moral rights may limit how you use the material.\" Attribution is the only term listed; no ShareAlike term appears.","source_url":"https://creativecommons.org/licenses/by/4.0/","reviewed_at":null},"license_raw":"CC BY 4.0 (GUS BDL)","latest_check":{"id":"fda8fbf0-86e0-4aab-9d31-6f16cc8f1ab4","entry_id":"79da40e3-34c8-4d1c-81f8-8ed840ae6dde","status":"VERIFIED","last_checked_at":"2026-10-21T16:00:27.679Z","p50_latency_ms":2951,"p95_latency_ms":null,"last_error":null,"consecutive_failures":0,"created_at":"2026-07-28T21:20:30.816Z","updated_at":"2026-10-21T16:00:27.679Z","consecutive_successes":20,"probe_url":"https://bdl.stat.gov.pl/api/v1/subjects/P3966","probe_method":"GET","probe_http_status":200,"probe_content_type":"application/json; charset=utf-8","probe_succeeded_at":"2026-10-21T16:00:27.679Z"},"data_profile":{"id":"0417d20d-3824-4e14-887d-582d4557f01f","entry_id":"79da40e3-34c8-4d1c-81f8-8ed840ae6dde","profile_source":"bdl","profile_kind":"dataset","dataset_id":"P3966","fields":[{"name":"variable_id","role":"parameter","type":"string","label":null,"param_in":"path","required":true,"description":"GUS variable id selecting the measured series of subject P3966 (the n1/n2 dimension combination): 1646208=owned by housing cooperatives / total uninhabited dwelling [-]; 1646209=owned by housing cooperatives / total uninhabited dwelling [m2]; 1646210=owned by housing cooperatives / due to waiting for settlement [-]; 1646211=owned by housing cooperatives / due to waiting for settlement [m2]; 1646212=owned by housing cooperatives / due to the purpose of renovation [-]; 1646213=owned by housing cooperatives / due to the purpose of renovation [m2]; 1646214=owned by housing cooperatives / due to the intended for demolition [-]; 1646215=owned by housing cooperatives / due to the intended for demolition [m2]; 1646216=owned by housing cooperatives / due to poor technical condition [-]; 1646217=owned by housing cooperatives / due to poor technical condition [m2]; 1646218=owned by housing cooperatives / due to other reasons [-]; 1646219=owned by housing cooperatives / due to other reasons [m2]; 1646220=companies stocks / total uninhabited dwelling [-]; 1646221=companies stocks / total uninhabited dwelling [m2]; 1646222=companies stocks / due to waiting for settlement [-]; … (72 variables — GET https://bdl.stat.gov.pl/api/v1/variables?subject-id=P3966 for the full list).","enum_values":["1646208","1646209","1646210","1646211","1646212","1646213","1646214","1646215","1646216","1646217","1646218","1646219","1646220","1646221","1646222","1646223","1646224","1646225","1646226","1646227","1646228","1646229","1646230","1646231","1646232","1646233","1646234","1646235","1646236","1646237","1646238","1646239","1646240","1646241","1646242","1646243","1646244","1646245","1646246","1646247","1646248","1646249","1646250","1646251","1646252","1646253","1646254","1646255","1646256","1646257","1646258","1646259","1646260","1646261","1646262","1646263","1646264","1646265","1646266","1646267","1646268","1646269","1646270","1646271","1646272","1646273","1646274","1646275","1646276","1646277","1646278","1646279"],"description_en":"GUS variable id identifying the specific ownership type and measure of uninhabited dwellings."},{"name":"unit_level","role":"parameter","type":"integer","label":null,"param_in":"query","description":"Territorial aggregation level: 0=Poland, 1=macroregion, 2=voivodship (województwo), 3=region, 4=subregion, 5=powiat, 6=gmina.","enum_values":["0","1","2","3","4","5","6"],"description_en":"Territorial aggregation level, from country down to gmina."},{"name":"year","role":"parameter","type":"integer","label":null,"param_in":"query","description":"Reference year of the value (yearly series, back to 1995 for the oldest subjects). Filters server-side via the API's year parameter.","description_en":"Reference year of the recorded value."},{"name":"unit_id","type":"string","label":null,"description":"12-digit BDL territorial-unit id (macroregion+voivodship+region+subregion+powiat+gmina+type digits). An equality filter pins the unit server-side (unit-parent-id).","description_en":"12-digit BDL code identifying the territorial unit."},{"name":"unit_name","type":"string","label":null,"description":null,"description_en":"Name of the territorial unit."},{"name":"teryt_terc","type":"string","label":null,"description":"TERYT TERC territorial code derived from the unit id (2 digits = voivodship, 4 = powiat, 7 = gmina incl. type digit; empty for NUTS-only units).","description_en":"TERYT TERC administrative code for the territorial unit."},{"name":"value","type":"number","label":null,"description":null,"description_en":"Numeric value of the measured variable for the unit and year."},{"name":"attr_id","type":"integer","label":null,"description":"GUS value-attribute id (data quality/annotation flag).","description_en":"GUS data quality or annotation flag for the value."}],"field_count":8,"sample_records":[{"year":2018,"value":4288,"attr_id":1,"unit_id":"000000000000","unit_name":"POLAND","teryt_terc":null,"unit_level":null,"variable_id":"1646208"},{"year":2020,"value":4318,"attr_id":1,"unit_id":"000000000000","unit_name":"POLAND","teryt_terc":null,"unit_level":null,"variable_id":"1646208"},{"year":2022,"value":4563,"attr_id":1,"unit_id":"000000000000","unit_name":"POLAND","teryt_terc":null,"unit_level":null,"variable_id":"1646208"},{"year":2024,"value":4107,"attr_id":1,"unit_id":"000000000000","unit_name":"POLAND","teryt_terc":null,"unit_level":null,"variable_id":"1646208"},{"year":2018,"value":1123,"attr_id":1,"unit_id":"010000000000","unit_name":"MACROREGION POŁUDNIOWY","teryt_terc":null,"unit_level":null,"variable_id":"1646208"},{"year":2020,"value":1199,"attr_id":1,"unit_id":"010000000000","unit_name":"MACROREGION POŁUDNIOWY","teryt_terc":null,"unit_level":null,"variable_id":"1646208"},{"year":2022,"value":1198,"attr_id":1,"unit_id":"010000000000","unit_name":"MACROREGION POŁUDNIOWY","teryt_terc":null,"unit_level":null,"variable_id":"1646208"},{"year":2024,"value":1084,"attr_id":1,"unit_id":"010000000000","unit_name":"MACROREGION POŁUDNIOWY","teryt_terc":null,"unit_level":null,"variable_id":"1646208"}],"record_count":null,"data_size_bytes":null,"dataset_count":null,"query_examples":[{"url":"https://bdl.stat.gov.pl/api/v1/data/by-variable/1646208?page-size=10&format=json&lang=en","curl":"curl -s 'https://bdl.stat.gov.pl/api/v1/data/by-variable/1646208?page-size=10&format=json&lang=en'","label":"Values of one variable across territorial units","method":"GET","description":"Yearly values of variable 1646208 (owned by housing cooperatives / total uninhabited dwelling [-]) per territorial unit. Filters: unit-level=0–6, year=YYYY, unit-parent-id={12-digit unit id}; page-size ≤ 100. Anonymous limits: 5 req/s, 100 req/15 min."},{"url":"https://api.stat.gov.pl/Home/BdlApi","curl":"curl -s 'https://api.stat.gov.pl/Home/BdlApi'","label":"Documentation","method":"GET","description":"GUS BDL API reference (endpoints, parameters, limits, CC BY 4.0 licence)."}],"status":"ok","error_message":null,"profiled_at":"2026-10-18T11:37:31.961Z","run_id":"33966b7b-9358-4521-923e-0490945ddcf8","created_at":"2026-07-25T14:46:31.146Z","updated_at":"2026-10-18T11:37:31.961Z","license_raw":"CC BY 4.0 (GUS BDL)","license_id":"cc-by-4.0","consecutive_failure_count":0,"last_error_at":null,"last_error_message":null,"previewable":true,"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":"46e5c5b01039f91874542fdb0ea4aab5e11885679978312f90b17d261a948b53","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. 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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."}}