@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 "Environment"@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 "The WFS layer Puurekisteri_piste of the city map service, as GeoJSON. Read daily in four parts (pipelines trees-0…3)." ; dct:title "City of Helsinki tree register" . a dct:Standard . a dcat:Distribution ; dct:description """A CSV table, generated on each download from the endpoint's live data. curl -o file.csv 'https://api.smartcity.joinedcontext.com/api/endpoint/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4/file.csv' Open to anyone, with no sign-in.""" ; dct:format ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.310208"^^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 NGSI-LD API (ETSI GS CIM 009) of this dataset: query, filter and page its entities. The first ten Tree entities: curl -H 'Accept: application/ld+json' 'https://api.smartcity.joinedcontext.com/api/endpoint/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4/ngsi-ld/v1/entities?type=Tree&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.smartcity.joinedcontext.com/d/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4""" ; dct:format ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.310034"^^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 "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.310838"^^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 """For AI assistants: a Model Context Protocol server over this dataset's endpoint https://api.smartcity.joinedcontext.com/api/endpoint/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4. 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-trees":{"type":"http","url":"https://api.smartcity.joinedcontext.com/api/endpoint/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4/mcp"}}} """ ; dct:format ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.310642"^^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 OWL; sha256 0ad04a97da1126197c9a992032af3a1c8595a82ae16a66e009e97be512c3e115." ; dct:format ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.311246"^^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 "0ad04a97da1126197c9a992032af3a1c8595a82ae16a66e009e97be512c3e115"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "2860"^^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.smartcity.joinedcontext.com/api/endpoint/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4/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.smartcity.joinedcontext.com/api/endpoint/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4/ogc/features/. With curl: curl 'https://api.smartcity.joinedcontext.com/api/endpoint/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4/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.smartcity.joinedcontext.com/d/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4""" ; dct:format ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.310441"^^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 data model as Markdown; sha256 37782b6d2303826afdcd29ecbd575689cefbe2b3544c8e83bd182877b969874f." ; dct:format ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.311159"^^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 "37782b6d2303826afdcd29ecbd575689cefbe2b3544c8e83bd182877b969874f"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "1996"^^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.smartcity.joinedcontext.com/api/endpoint/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4/ws' {"metadata":{"x-op":"x-subscribe","x-id":"s1"},"body":{"type":"Subscription","entities":[{"type":"Tree"}]}} 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://smartcity.joinedcontext.com/docs/API/07-websocket""" ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.310331"^^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 "The data model as LinkML; sha256 ab7aba9d2d6b50d3f6d7027993d8eef7716694c3b0b6d47d807fd82cc08380ae." ; dct:format ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.311076"^^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 "ab7aba9d2d6b50d3f6d7027993d8eef7716694c3b0b6d47d807fd82cc08380ae"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "7922"^^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 "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.310742"^^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 SHACL; sha256 0c2b0604c69d3eaffabf4adce656d2c9e73da186d15d2325b989d31d11187de9." ; dct:format ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.311513"^^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 "0c2b0604c69d3eaffabf4adce656d2c9e73da186d15d2325b989d31d11187de9"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "4277"^^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.smartcity.joinedcontext.com/api/endpoint/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4/odata/v4/. In Power BI: Get data, OData feed, the same URL. With curl: curl 'https://api.smartcity.joinedcontext.com/api/endpoint/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4/odata/v4/' Its entity sets: https://api.smartcity.joinedcontext.com/api/endpoint/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4/odata/v4/Tree. 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.smartcity.joinedcontext.com/d/xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4""" ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.310551"^^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 JSON-LD; sha256 bd2b7c4bf24339b8cdf93743d1ca13a53a54987993b6565cb9c51d3cf8e71fc4." ; dct:format ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.310969"^^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 "bd2b7c4bf24339b8cdf93743d1ca13a53a54987993b6565cb9c51d3cf8e71fc4"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "970"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as RDF; sha256 4918d47cb7d7d313e1f8d3713f82817127bda3c9c09f24d51bdfa2b657307750." ; dct:format ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.311345"^^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 "4918d47cb7d7d313e1f8d3713f82817127bda3c9c09f24d51bdfa2b657307750"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "1451"^^xsd:nonNegativeInteger ; dcat:mediaType . a dcat:Distribution ; dct:description "The data model as JSON Schema; sha256 3d1438fb28421f6bc908afa8d16ff461ec7cb3b56146e28155e7ec8b4da75358." ; dct:format ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:license ; dct:modified "2026-10-28T12:05:06.311418"^^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 "3d1438fb28421f6bc908afa8d16ff461ec7cb3b56146e28155e7ec8b4da75358"^^xsd:hexBinary ] ; dcat:accessURL ; dcat:byteSize "2799"^^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 "The street and park trees of Helsinki's tree register: the Finnish name (name), the scientific name (species), the trunk diameter class (trunkDiameterClass), the planting year where known (plantingYear), whether the tree stands along a street or in a park (treeSetting) and the street or park's name (treeSite). Smart Data Models has no tree model, so Tree and its properties are the platform's own. Source: City of Helsinki, CC BY 4.0." ; dct:identifier "xwl3gxuwwqw3gqqxlme2wz2rwsvhqdx4" ; dct:issued "2026-10-27T00:09:31.890145"^^xsd:dateTime ; dct:modified "2026-10-28T12:05:06.302550"^^xsd:dateTime ; dct:publisher ; dct:source ; dct:spatial ; dct:title "Tree register, street and park trees — Helsinki" ; dcat:contactPoint [ a vcard:Kind, vcard:Organization ; vcard:fn "joinedcontext" ; vcard:hasEmail ] ; dcat:distribution , , , , , , , , , , , , , , ; dcat:keyword "gatuträd", "katupuut", "kaupunkiluonto", "park trees", "parkträd", "puistopuut", "puurekisteri", "puut", "stadsnatur", "street trees", "tree register", "trees", "träd", "trädregister", "urban nature" ; dcat:landingPage ; dcat:theme ; prov:wasGeneratedBy [ a prov:Activity ; rdfs:label "pipeline trees-0" ] . a dct:MediaType . spdx:checksumAlgorithm_sha256 a spdx:ChecksumAlgorithm . a dct:LicenseDocument .