@prefix dcat: . @prefix dct: . @prefix foaf: . @prefix prov: . @prefix rdfs: . @prefix skos: . @prefix spdx: . @prefix vcard: . @prefix xsd: . a dct:Location . a skos:Concept ; skos:prefLabel "Transport"@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 "The city's LAM stations and their observations, CC BY 4.0." ; dct:title "Statistical API for traffic measurement data" . a dct:Standard . 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 TrafficFlowObserved entities: curl -H 'Accept: application/ld+json' 'https://api.dev.joinedcontext.com/api/endpoint/l4zysz2peezgtp7uycaqvyxwx2ad2nep/ngsi-ld/v1/entities?type=TrafficFlowObserved&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/l4zysz2peezgtp7uycaqvyxwx2ad2nep""" ; dct:format ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.998935"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, 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 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 "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999517"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "DCAT-AP record" ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as LinkML; sha256 1feb13b3ee0c455449e585d84a5191d28cc6de38016b7202c57408c85d7a7fc4." ; dct:format ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999628"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "helsinki model.linkml.yaml" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "1feb13b3ee0c455449e585d84a5191d28cc6de38016b7202c57408c85d7a7fc4"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "8903"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as OWL; sha256 632e3828d35c29b8e4830d5d39e153077a4b7e40c77dcb34856f977f70c0d128." ; dct:format ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999748"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "helsinki model.owl.ttl" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "632e3828d35c29b8e4830d5d39e153077a4b7e40c77dcb34856f977f70c0d128"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "3676"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:format ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T03:07:11.947472"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "TrafficFlowObserved" ; dcat:accessURL . a dcat:Distribution ; dct:description "The data model as RDF; sha256 3a756e1671b07dab6f3e8a7c9b06a892d8c8a5f47049115d7354894cdd70a7d6." ; dct:format ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999804"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "helsinki model.rdf.ttl" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "3a756e1671b07dab6f3e8a7c9b06a892d8c8a5f47049115d7354894cdd70a7d6"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "1788"^^xsd:nonNegativeInteger ; dcat:mediaType . 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/l4zysz2peezgtp7uycaqvyxwx2ad2nep/ws' {"metadata":{"x-op":"x-subscribe","x-id":"s1"},"body":{"type":"Subscription","entities":[{"type":"TrafficFlowObserved"}]}} 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 "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999169"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "Live updates over WebSocket" ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description """OGC SensorThings API 1.1, read-only: Things, Datastreams and Observations. curl 'https://api.dev.joinedcontext.com/api/endpoint/l4zysz2peezgtp7uycaqvyxwx2ad2nep/sta/v1.1/Things' 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/l4zysz2peezgtp7uycaqvyxwx2ad2nep""" ; dct:format ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999403"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "OGC SensorThings API" ; dcat:accessService [ a dcat:DataService ; dct:conformsTo ; dct:title "OGC SensorThings API" ; dcat:endpointURL ; dcat:servesDataset ] ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as JSON Schema; sha256 26183c798f2bde6a88cbcb75f3878f54419bc0c5adb921346d4afd4eecc5a1c0." ; dct:format ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999859"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "helsinki model.schema.json" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "26183c798f2bde6a88cbcb75f3878f54419bc0c5adb921346d4afd4eecc5a1c0"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "3673"^^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/l4zysz2peezgtp7uycaqvyxwx2ad2nep. 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":{"helsinki-traffic-counts":{"type":"http","url":"https://api.dev.joinedcontext.com/api/endpoint/l4zysz2peezgtp7uycaqvyxwx2ad2nep/mcp"}}} """ ; dct:format ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999111"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, 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 """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/l4zysz2peezgtp7uycaqvyxwx2ad2nep/odata/v4/. In Power BI: Get data, OData feed, the same URL. With curl: curl 'https://api.dev.joinedcontext.com/api/endpoint/l4zysz2peezgtp7uycaqvyxwx2ad2nep/odata/v4/' 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/l4zysz2peezgtp7uycaqvyxwx2ad2nep""" ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999316"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "OData v4" ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as Markdown; sha256 77cf7277710f0732e88b163e382f8e09e40725c252a6cb6dcfa5db8acfb3ebff." ; dct:format ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999693"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "helsinki model.md" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "77cf7277710f0732e88b163e382f8e09e40725c252a6cb6dcfa5db8acfb3ebff"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "2630"^^xsd:nonNegativeInteger ; 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/l4zysz2peezgtp7uycaqvyxwx2ad2nep/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/l4zysz2peezgtp7uycaqvyxwx2ad2nep/ogc/features/. With curl: curl 'https://api.dev.joinedcontext.com/api/endpoint/l4zysz2peezgtp7uycaqvyxwx2ad2nep/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/l4zysz2peezgtp7uycaqvyxwx2ad2nep""" ; dct:format ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999258"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, 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 """A CSV table, generated on each download from the endpoint's live data. curl -o file.csv 'https://api.dev.joinedcontext.com/api/endpoint/l4zysz2peezgtp7uycaqvyxwx2ad2nep/file.csv' Open to anyone, with no sign-in.""" ; dct:format ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999047"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "CSV" ; 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 "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999462"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "Schema artifacts" ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as JSON-LD; sha256 d0bc5d6a345a2e4f3ec470e02f60ab067188678bbbcfcef265666dba99ccc7cb." ; dct:format ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999574"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "helsinki context.jsonld" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "d0bc5d6a345a2e4f3ec470e02f60ab067188678bbbcfcef265666dba99ccc7cb"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "1517"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as SHACL; sha256 2adce761633acf9c303a053f261aa803c0dad7e76ebd72c75a5ec2e0a4e694dc." ; dct:format ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-23T07:12:49.999916"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: City of Helsinki, CC BY 4.0" ] ; dct:title "helsinki model.shacl.ttl" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "2adce761633acf9c303a053f261aa803c0dad7e76ebd72c75a5ec2e0a4e694dc"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "4826"^^xsd:nonNegativeInteger ; dcat:mediaType . a dct:Standard . a foaf:Agent ; foaf:name "City of Helsinki" . 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 rdfs:Resource . a dct:MediaTypeOrExtent . a dct:MediaType . a dct:MediaTypeOrExtent . a dcat:Dataset ; dct:accrualPeriodicity ; dct:conformsTo ; dct:description "The motor vehicles and their mean speed the city's LAM (induction loop) stations measured the day before, per station and direction; each day's figure stays in the entity's history. Smart Data Models type TrafficFlowObserved (intensity, averageVehicleSpeed in km/h); the custom property trafficDirection names the direction of travel. Stations that measure no speed carry no mean speed. Source: City of Helsinki, CC BY 4.0." ; dct:identifier "l4zysz2peezgtp7uycaqvyxwx2ad2nep" ; dct:issued "2026-10-23T02:46:12.330495"^^xsd:dateTime ; dct:modified "2026-10-23T07:12:49.985939"^^xsd:dateTime ; dct:publisher ; dct:source ; dct:spatial ; dct:title "Traffic counts — Helsinki" ; dcat:contactPoint [ a vcard:Kind, vcard:Organization ; vcard:fn "joinedcontext" ; vcard:hasEmail ] ; dcat:distribution , , , , , , , , , , , , , , , , ; dcat:keyword "keskinopeus", "liikennelaskenta", "liikennemäärät", "mean speed", "medelhastighet", "traffic counting", "traffic volumes", "trafikmängder", "trafikräkning" ; dcat:landingPage ; dcat:theme ; prov:wasGeneratedBy [ a prov:Activity ; rdfs:label "pipeline traffic-counters" ] . a dct:MediaType . spdx:checksumAlgorithm_sha256 a spdx:ChecksumAlgorithm . a dct:LicenseDocument .