@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:MediaTypeOrExtent . a dct:Frequency . a dct:MediaType . a dct:MediaType . a dct:MediaType . a dct:MediaType . a dct:MediaType . a dct:Standard . a dcat:Dataset ; dct:description "A WFS layer of the city's map service, as GeoJSON. Read weekly (pipeline traffic-lights)." ; dct:title "Junctions with traffic lights" . a dcat:Dataset ; dct:description "A WFS layer of the city's map service, as GeoJSON. Read weekly (pipeline warning-lights)." ; dct:title "Crossings with warning lights" . a dct:Standard . 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/wylttuwlfud5yxnwsersbiom4xuhd7jm. 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-signals":{"type":"http","url":"https://api.dev.joinedcontext.com/api/endpoint/wylttuwlfud5yxnwsersbiom4xuhd7jm/mcp"}}} """ ; dct:format ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.174797"^^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 "The data model as LinkML; sha256 95029ba8c56b1de77d2f1c4684b836406e6e7603f705681fd2aa978facf36c18." ; dct:format ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.175029"^^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 "95029ba8c56b1de77d2f1c4684b836406e6e7603f705681fd2aa978facf36c18"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "8853"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as OWL; sha256 b100a0b4572e5ca86e1bad86c90f0d43b3932f617dda3f9b25b260ad139263b5." ; dct:format ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.175151"^^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 "b100a0b4572e5ca86e1bad86c90f0d43b3932f617dda3f9b25b260ad139263b5"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "2986"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as JSON-LD; sha256 a78708cb408c922b55e1dd5c7936c22f46667a80e6a409f3c70b650686aaa7bf." ; dct:format ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.174971"^^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 "a78708cb408c922b55e1dd5c7936c22f46667a80e6a409f3c70b650686aaa7bf"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "1033"^^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 TrafficSignalJunction entities: curl -H 'Accept: application/ld+json' 'https://api.dev.joinedcontext.com/api/endpoint/wylttuwlfud5yxnwsersbiom4xuhd7jm/ngsi-ld/v1/entities?type=TrafficSignalJunction&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/wylttuwlfud5yxnwsersbiom4xuhd7jm""" ; dct:format ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.174344"^^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 data model as JSON Schema; sha256 7cd21fac894ba460a32119e0a21f7212a97611cfe35a5ce3e63802c7ffaad83f." ; dct:format ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.175283"^^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 "7cd21fac894ba460a32119e0a21f7212a97611cfe35a5ce3e63802c7ffaad83f"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "2919"^^xsd:nonNegativeInteger ; 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/wylttuwlfud5yxnwsersbiom4xuhd7jm/odata/v4/. In Power BI: Get data, OData feed, the same URL. With curl: curl 'https://api.dev.joinedcontext.com/api/endpoint/wylttuwlfud5yxnwsersbiom4xuhd7jm/odata/v4/' Its entity sets: https://api.dev.joinedcontext.com/api/endpoint/wylttuwlfud5yxnwsersbiom4xuhd7jm/odata/v4/TrafficSignalJunction. 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/wylttuwlfud5yxnwsersbiom4xuhd7jm""" ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.174742"^^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 065420d9ae4ed3eba4a130fd7ee6d59bf3c976efda2b81ece98e4c5309619fe8." ; dct:format ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.175085"^^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 "065420d9ae4ed3eba4a130fd7ee6d59bf3c976efda2b81ece98e4c5309619fe8"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "2107"^^xsd:nonNegativeInteger ; 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 "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.174855"^^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 """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/wylttuwlfud5yxnwsersbiom4xuhd7jm/ws' {"metadata":{"x-op":"x-subscribe","x-id":"s1"},"body":{"type":"Subscription","entities":[{"type":"TrafficSignalJunction"}]}} 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 "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.174587"^^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 """A CSV table, generated on each download from the endpoint's live data. curl -o file.csv 'https://api.dev.joinedcontext.com/api/endpoint/wylttuwlfud5yxnwsersbiom4xuhd7jm/file.csv' Open to anyone, with no sign-in.""" ; dct:format ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.174515"^^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 as SHACL; sha256 9bb052489cbeeae9b6658be12611ccac967e694e3430d38aa4189d5e0a4c7260." ; dct:format ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.175347"^^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 "9bb052489cbeeae9b6658be12611ccac967e694e3430d38aa4189d5e0a4c7260"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "4294"^^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/wylttuwlfud5yxnwsersbiom4xuhd7jm/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/wylttuwlfud5yxnwsersbiom4xuhd7jm/ogc/features/. With curl: curl 'https://api.dev.joinedcontext.com/api/endpoint/wylttuwlfud5yxnwsersbiom4xuhd7jm/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/wylttuwlfud5yxnwsersbiom4xuhd7jm""" ; dct:format ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.174681"^^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 "The Endpoint's own DCAT-AP 3.0 description, which this dataset is published from (EP-63)." ; dct:format ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.174911"^^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 RDF; sha256 fd87c0a82967059f4ffeb9dc3eb39efee74bc23b7ec8bfc259f40182ea68dc49." ; dct:format ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-27T13:40:47.175210"^^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 "fd87c0a82967059f4ffeb9dc3eb39efee74bc23b7ec8bfc259f40182ea68dc49"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "1460"^^xsd:nonNegativeInteger ; dcat:mediaType . a dct:Standard . a foaf:Agent ; foaf:name "City of Helsinki" . a dct:Standard . 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 "Helsinki's junctions with traffic lights (signalKind trafficLights) and crossings with warning lights (signalKind warningLights): where each is, the streets that meet there, its installation number and whether its signals are in service or still being built (status). Source: City of Helsinki, CC BY 4.0." ; dct:identifier "wylttuwlfud5yxnwsersbiom4xuhd7jm" ; dct:issued "2026-10-27T00:50:27.891919"^^xsd:dateTime ; dct:modified "2026-10-27T13:40:47.159722"^^xsd:dateTime ; dct:publisher ; dct:source , ; dct:spatial ; dct:title "Junctions with traffic lights and warning lights — Helsinki" ; dcat:contactPoint [ a vcard:Kind, vcard:Organization ; vcard:fn "joinedcontext" ; vcard:hasEmail ] ; dcat:distribution , , , , , , , , , , , , , , ; dcat:keyword "crossings", "junctions", "korsningar", "liikenne", "liikennevalot", "liittymät", "risteykset", "traffic", "traffic lights", "trafik", "trafikljus", "varningsljus", "varoitusvalot", "warning lights" ; dcat:landingPage ; dcat:theme ; prov:wasGeneratedBy [ a prov:Activity ; rdfs:label "pipeline traffic-lights" ] . a dct:MediaType . spdx:checksumAlgorithm_sha256 a spdx:ChecksumAlgorithm . a dct:LicenseDocument .