@prefix dcat: . @prefix dct: . @prefix foaf: . @prefix prov: . @prefix rdfs: . @prefix skos: . @prefix spdx: . @prefix vcard: . @prefix xsd: . a dct:Location . a foaf:Agent ; foaf:name "Ajuntament de Barcelona" . a skos:Concept ; skos:prefLabel "Environment"@en . a skos:Concept ; skos:prefLabel "Health"@en . a dct:MediaTypeOrExtent . a dct:MediaTypeOrExtent . a dct:MediaTypeOrExtent . a dct:MediaTypeOrExtent . a dct:Frequency . a dct:MediaType . a dct:MediaType . a dct:MediaType . a dct:MediaType . a dct:MediaType . a dct:Standard . a dct:Standard . a dcat:Dataset ; dct:description "Mitjanes horàries de les estacions de la xarxa de vigilància de la qualitat de l'aire, CC BY 4.0." ; dct:title "Qualitat de l'aire. Dades horàries (Open Data BCN)" . a dcat:Dataset ; dct:description "Nom, ubicació i contaminants de cada estació, CC BY 4.0." ; dct:title "Qualitat de l'aire. Estacions de mesura (Open Data BCN)" . a dcat:Distribution ; dct:description """Live updates: open one WebSocket, subscribe to the entities you want, and each change arrives as a message, with no server of your own. With websocat, then type the subscription: websocat --protocol ngsi-ld-ws 'wss://api.dev.joinedcontext.com/api/endpoint/esbxdrr7snorjsp7uus2luihr6vl5vv6/ws' {"metadata":{"x-op":"x-subscribe","x-id":"s1"},"body":{"type":"Subscription","entities":[{"type":"AirQualityObserved"}]}} Always live: the catalogue holds this link, never a copy. Open to anyone, with no sign-in. The message format, the limits and examples in JavaScript and Python: https://dev.joinedcontext.com/docs/API/07-websocket""" ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.030454"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "Live updates over WebSocket" ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description "The Endpoint's own DCAT-AP 3.0 description, which this dataset is published from (EP-63)." ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.030802"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "DCAT-AP record" ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description """OData v4, read-only: each entity type is an entity set, with $filter, $select, $orderby and $top. In Excel: Data, Get Data, From Other Sources, From OData Feed, then the URL https://api.dev.joinedcontext.com/api/endpoint/esbxdrr7snorjsp7uus2luihr6vl5vv6/odata/v4/. In Power BI: Get data, OData feed, the same URL. With curl: curl 'https://api.dev.joinedcontext.com/api/endpoint/esbxdrr7snorjsp7uus2luihr6vl5vv6/odata/v4/' Its entity sets: https://api.dev.joinedcontext.com/api/endpoint/esbxdrr7snorjsp7uus2luihr6vl5vv6/odata/v4/AirQualityObserved. Always live: the catalogue holds this link, never a copy. Open to anyone, with no sign-in. The fields it filters on and example queries that answered with this dataset's data: https://api.dev.joinedcontext.com/d/esbxdrr7snorjsp7uus2luihr6vl5vv6""" ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.030619"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "OData v4" ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as LinkML; sha256 a2fbce1557e695ba3cbc6f18d687c3b56b48d7ea3afbd0965170237ba56715f5." ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.030955"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "barcelona model.linkml.yaml" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "a2fbce1557e695ba3cbc6f18d687c3b56b48d7ea3afbd0965170237ba56715f5"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "9355"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as RDF; sha256 93e79a7a152a8062aec1816313003cd4a1480c067fd9623feedc639b1486a5ba." ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.031184"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "barcelona model.rdf.ttl" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "93e79a7a152a8062aec1816313003cd4a1480c067fd9623feedc639b1486a5ba"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "2473"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as JSON Schema; sha256 956f19323322266716d532e7c69a122d9518b547a33b4a01892fbc3f73dc3348." ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.031298"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "barcelona model.schema.json" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "956f19323322266716d532e7c69a122d9518b547a33b4a01892fbc3f73dc3348"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "4426"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.031453"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "AirQualityObserved" ; dcat:accessURL . a dcat:Distribution ; dct:description "The data model as Markdown; sha256 cf14a6edc44c3b9310b104a50a849d8dec13ec4a491c8da22fddee13f759ef0b." ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.031034"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "barcelona model.md" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "cf14a6edc44c3b9310b104a50a849d8dec13ec4a491c8da22fddee13f759ef0b"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "2738"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as SHACL; sha256 b736f555c74dee85da4c056c390858a6f2e5158356b5dec2d2035d53ec35d170." ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.031370"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "barcelona model.shacl.ttl" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "b736f555c74dee85da4c056c390858a6f2e5158356b5dec2d2035d53ec35d170"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "6803"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as JSON-LD; sha256 ee4d71ce57e34d4cd7f5dc38b6b1ad4eab2ee89f731fa4210048ca892f0bc9b9." ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.030879"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "barcelona context.jsonld" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "ee4d71ce57e34d4cd7f5dc38b6b1ad4eab2ee89f731fa4210048ca892f0bc9b9"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "2181"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description """For AI assistants: a Model Context Protocol server over this dataset's endpoint https://api.dev.joinedcontext.com/api/endpoint/esbxdrr7snorjsp7uus2luihr6vl5vv6. It answers anyone, with no sign-in, what the endpoint serves the public. Tools: `query_entities` (the rows of an entity type, with an NGSI-LD `q` filter, `attrs`, `count` and paging), `get_entity` (one entity by its URN), `describe_schema` (the data model: read it first) and `describe_access` (what you may read). Licence: Creative Commons Attribution 4.0; the data is reused under it. An MCP client reaches it with this configuration: {"mcpServers":{"air-quality":{"type":"http","url":"https://api.dev.joinedcontext.com/api/endpoint/esbxdrr7snorjsp7uus2luihr6vl5vv6/mcp"}}} """ ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.030363"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "Model Context Protocol" ; dcat:accessService [ a dcat:DataService ; dct:conformsTo ; dct:title "Model Context Protocol" ; dcat:endpointURL ; dcat:servesDataset ] ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model in every formalism, for every model version, each artifact with its sha256 (EP-68)." ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.030726"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "Schema artifacts" ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description """A CSV table, generated on each download from the endpoint's live data. curl -o file.csv 'https://api.dev.joinedcontext.com/api/endpoint/esbxdrr7snorjsp7uus2luihr6vl5vv6/file.csv' Open to anyone, with no sign-in.""" ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.030266"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "CSV" ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description """OGC API - Features, read-only: Part 1 (Core: collections and items), Part 2 (coordinate reference systems by reference) and Part 3 (Filtering with CQL2). https://api.dev.joinedcontext.com/api/endpoint/esbxdrr7snorjsp7uus2luihr6vl5vv6/ogc/features/conformance lists the classes this endpoint serves. In QGIS: Layer, Add Layer, Add WFS / OGC API - Features Layer, a new connection with the URL https://api.dev.joinedcontext.com/api/endpoint/esbxdrr7snorjsp7uus2luihr6vl5vv6/ogc/features/. With curl: curl 'https://api.dev.joinedcontext.com/api/endpoint/esbxdrr7snorjsp7uus2luihr6vl5vv6/ogc/features/collections' Always live: the catalogue holds this link, never a copy. Open to anyone, with no sign-in. The fields it filters on and example queries that answered with this dataset's data: https://api.dev.joinedcontext.com/d/esbxdrr7snorjsp7uus2luihr6vl5vv6""" ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.030537"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "OGC API - Features" ; dcat:accessService [ a dcat:DataService ; dct:conformsTo ; dct:title "OGC API - Features" ; dcat:endpointURL ; dcat:servesDataset ] ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as OWL; sha256 e35def2984ac8766ad62fd9f01e24b5803c29ec1ea0701ccec93605b16984f63." ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.031109"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "barcelona model.owl.ttl" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "e35def2984ac8766ad62fd9f01e24b5803c29ec1ea0701ccec93605b16984f63"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "4909"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description """The NGSI-LD API (ETSI GS CIM 009) of this dataset: query, filter and page its entities. The first ten AirQualityObserved entities: curl -H 'Accept: application/ld+json' 'https://api.dev.joinedcontext.com/api/endpoint/esbxdrr7snorjsp7uus2luihr6vl5vv6/ngsi-ld/v1/entities?type=AirQualityObserved&limit=10' Always live: the catalogue holds this link, never a copy. Open to anyone, with no sign-in. The fields it filters on and example queries that answered with this dataset's data: https://api.dev.joinedcontext.com/d/esbxdrr7snorjsp7uus2luihr6vl5vv6""" ; dct:format ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T12:11:07.030100"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Font: Ajuntament de Barcelona, Open Data BCN, CC BY 4.0" ] ; dct:title "NGSI-LD API" ; dcat:accessService [ a dcat:DataService ; dct:conformsTo ; dct:title "NGSI-LD API" ; dcat:endpointURL ; dcat:servesDataset ] ; dcat:accessURL ; dcat:mediaType . a dct:Standard . a dct:Standard . a dct:MediaTypeOrExtent . a dct:MediaTypeOrExtent . a dct:MediaType . a foaf:Document . a rdfs:Resource . a rdfs:Resource . a rdfs:Resource . a dct:MediaTypeOrExtent . a dct:MediaTypeOrExtent . a dct:MediaType . a dcat:Dataset ; dct:accrualPeriodicity ; dct:conformsTo ; dct:description "Les estacions de la xarxa de qualitat de l'aire de Barcelona i la darrera mitjana horària de cada contaminant (NO2, O3, PM10, PM2.5, SO2, CO, NO, NOx, carboni negre), amb 30 dies d'història." ; dct:identifier "esbxdrr7snorjsp7uus2luihr6vl5vv6" ; dct:issued "2026-10-23T11:01:53.590982"^^xsd:dateTime ; dct:modified "2026-10-23T12:11:07.021744"^^xsd:dateTime ; dct:publisher ; dct:source , ; dct:spatial ; dct:title "Qualitat de l'aire a Barcelona" ; dcat:contactPoint [ a vcard:Kind, vcard:Organization ; vcard:fn "joinedcontext platform" ; vcard:hasEmail ] ; dcat:distribution , , , , , , , , , , , , , , , ; dcat:keyword "NO2", "PM10", "air quality", "calidad del aire", "contaminació", "contaminación", "pollution", "qualitat de l aire" ; dcat:landingPage ; dcat:theme , ; prov:wasGeneratedBy [ a prov:Activity ; rdfs:label "pipeline air-quality" ] . a dct:MediaType . spdx:checksumAlgorithm_sha256 a spdx:ChecksumAlgorithm . a dct:LicenseDocument .