@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:MediaType . a dct:Standard . a foaf:Document . a dct:Standard . 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/dhiw4735mzyvwkrmszljpxcvvgv32q33/ws' {"metadata":{"x-op":"x-subscribe","x-id":"s1"},"body":{"type":"Subscription","entities":[{"type":"Alert"}]}} 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 "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.299541"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, CC BY 4.0" ] ; dct:title "Live updates over WebSocket" ; dcat:accessURL ; 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/dhiw4735mzyvwkrmszljpxcvvgv32q33. 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-alerts":{"type":"http","url":"https://api.dev.joinedcontext.com/api/endpoint/dhiw4735mzyvwkrmszljpxcvvgv32q33/mcp"}}} """ ; dct:format ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.299318"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, 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/dhiw4735mzyvwkrmszljpxcvvgv32q33/odata/v4/. In Power BI: Get data, OData feed, the same URL. With curl: curl 'https://api.dev.joinedcontext.com/api/endpoint/dhiw4735mzyvwkrmszljpxcvvgv32q33/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/dhiw4735mzyvwkrmszljpxcvvgv32q33""" ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.300075"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, CC BY 4.0" ] ; dct:title "OData v4" ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as LinkML; sha256 72a491cdfba4d29f9f1693f4bbb11bdf2f98411cf3f37710de719921413a06f2." ; dct:format ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.300645"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, CC BY 4.0" ] ; dct:title "helsinki model.linkml.yaml" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "72a491cdfba4d29f9f1693f4bbb11bdf2f98411cf3f37710de719921413a06f2"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "8222"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as SHACL; sha256 ce346825c890216052aad6f06f52ded3541f2e89b9552f0110aa11fff27aed0a." ; dct:format ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.301966"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, CC BY 4.0" ] ; dct:title "helsinki model.shacl.ttl" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "ce346825c890216052aad6f06f52ded3541f2e89b9552f0110aa11fff27aed0a"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "6086"^^xsd:nonNegativeInteger ; 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/dhiw4735mzyvwkrmszljpxcvvgv32q33/file.csv' Open to anyone, with no sign-in.""" ; dct:format ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.299059"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, CC BY 4.0" ] ; dct:title "CSV" ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as JSON-LD; sha256 7a243eccd59d1abf3eded2eb554b228b0fa2a7d19ee76e1c0de3796e25061039." ; dct:format ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.300464"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, CC BY 4.0" ] ; dct:title "helsinki context.jsonld" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "7a243eccd59d1abf3eded2eb554b228b0fa2a7d19ee76e1c0de3796e25061039"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "1594"^^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/dhiw4735mzyvwkrmszljpxcvvgv32q33/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/dhiw4735mzyvwkrmszljpxcvvgv32q33/ogc/features/. With curl: curl 'https://api.dev.joinedcontext.com/api/endpoint/dhiw4735mzyvwkrmszljpxcvvgv32q33/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/dhiw4735mzyvwkrmszljpxcvvgv32q33""" ; dct:format ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.299860"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, 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 JSON Schema; sha256 a1d176d86ef9437462a3d14f95780c28f171e350c7a29cb01a7b387a4eaeec4e." ; dct:format ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.301803"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, CC BY 4.0" ] ; dct:title "helsinki model.schema.json" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "a1d176d86ef9437462a3d14f95780c28f171e350c7a29cb01a7b387a4eaeec4e"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "4283"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:format ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T08:47:37.715384"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, CC BY 4.0" ] ; dct:title "Alert" ; dcat:accessURL . a dcat:Distribution ; dct:description "The data model as OWL; sha256 b984b9552d4d2fe8a78cfea9b6c9925b987b2fa553e9a8a0772b47f609a71efe." ; dct:format ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.301388"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, CC BY 4.0" ] ; dct:title "helsinki model.owl.ttl" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "b984b9552d4d2fe8a78cfea9b6c9925b987b2fa553e9a8a0772b47f609a71efe"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "4277"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as RDF; sha256 c92f25cfe5daa156d540072ee0257d0599eddb472a21d1babbdaa0e66fff2c6a." ; dct:format ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.301602"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, CC BY 4.0" ] ; dct:title "helsinki model.rdf.ttl" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "c92f25cfe5daa156d540072ee0257d0599eddb472a21d1babbdaa0e66fff2c6a"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "2158"^^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 Alert entities: curl -H 'Accept: application/ld+json' 'https://api.dev.joinedcontext.com/api/endpoint/dhiw4735mzyvwkrmszljpxcvvgv32q33/ngsi-ld/v1/entities?type=Alert&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/dhiw4735mzyvwkrmszljpxcvvgv32q33""" ; dct:format ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.298790"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, 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 in every formalism, for every model version, each artifact with its sha256 (EP-68)." ; dct:format ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.300292"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, CC BY 4.0" ] ; dct:title "Schema artifacts" ; dcat:accessURL ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as Markdown; sha256 800c76924add72fb0037aa95830e7f0676178d3b5c5a86897a5a37cdfb4ed036." ; dct:format ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-19T13:33:26.301013"^^xsd:dateTime ; dct:rights [ a dct:RightsStatement ; rdfs:label "Source: Fintraffic / digitraffic.fi, CC BY 4.0" ] ; dct:title "helsinki model.md" ; spdx:checksum [ a spdx:Checksum ; spdx:algorithm spdx:checksumAlgorithm_sha256 ; spdx:checksumValue "800c76924add72fb0037aa95830e7f0676178d3b5c5a86897a5a37cdfb4ed036"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "2490"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Dataset ; dct:description "Fintraffic's road works and traffic announcements, CC BY 4.0." ; dct:title "Digitraffic traffic messages" . a dct:Standard . a foaf:Agent ; foaf:name "City of Helsinki" . a dct:Standard . a dct:MediaTypeOrExtent . a dct:MediaTypeOrExtent . a dct:MediaTypeOrExtent . a rdfs:Resource . a rdfs:Resource . a rdfs:Resource . a dct:MediaTypeOrExtent . a dct:MediaType . a dcat:Dataset ; dct:accrualPeriodicity ; dct:conformsTo ; dct:description "Traffic announcements, road works and HSL's service alerts in the Helsinki area. Sources: Fintraffic / digitraffic.fi and HSL, CC BY 4.0." ; dct:identifier "dhiw4735mzyvwkrmszljpxcvvgv32q33" ; dct:issued "2026-09-20T07:34:09+00:00"^^xsd:dateTime ; dct:modified "2026-10-19T13:33:26.285700"^^xsd:dateTime ; dct:publisher ; dct:source ; dct:spatial ; dct:title "Helsinki traffic alerts" ; dcat:contactPoint [ a vcard:Kind, vcard:Organization ; vcard:fn "joinedcontext" ; vcard:hasEmail ] ; dcat:distribution , , , , , , , , , , , , , , ; dcat:keyword "liikenne", "liikennetiedotteet", "road works", "tietyöt", "traffic", "traffic announcements", "trafik", "trafikmeddelanden", "vägarbeten" ; dcat:landingPage ; dcat:theme ; prov:wasGeneratedBy [ a prov:Activity ; rdfs:label "pipeline traffic-messages" ] . a dct:MediaType . spdx:checksumAlgorithm_sha256 a spdx:ChecksumAlgorithm . a dct:LicenseDocument .