{"id":41633,"date":"2026-09-08T10:26:37","date_gmt":"2026-09-08T08:26:37","guid":{"rendered":"https:\/\/smartdatamodels.org\/?p=41633"},"modified":"2026-09-08T10:26:37","modified_gmt":"2026-09-08T08:26:37","slug":"state-of-the-candidates-repository-29-standards-385-data-models","status":"publish","type":"post","link":"https:\/\/smartdatamodels.org\/index.php\/state-of-the-candidates-repository-29-standards-385-data-models\/","title":{"rendered":"State of the Candidates Repository: 29 Standards, 385 Data Models"},"content":{"rendered":"<p>This is just a summary for the participants of the FIWARE global summit 2026. See you there in Menton.<\/p>\n<p>Smart Data Models&#8217; <a href=\"https:\/\/github.com\/smart-data-models\/Candidates\">Candidates repository<\/a> has grown a lot over the past few weeks. This post is a single roundup of everything in it today: <strong>29 source standards, translated into 385 NGSI-LD \/ NGSI-v2 candidate data models<\/strong>, each shipping the full Candidates artifact set \u2014 a JSON Schema, an NGSI-LD <code>@context<\/code>, and all four example serializations (NGSI-v2 and NGSI-LD, key-values and normalized), validated against its own schema.<\/p>\n<p>Every one of these is a <strong>Candidate<\/strong>: a first, carefully-sourced translation from a real external ontology or specification, not yet promoted to an official Smart Data Models subject. Several carry known open items \u2014 license reconciliation, overlap checks against existing official subjects, or cross-standard naming collisions \u2014 noted in each standard&#8217;s own <code>standard-metadata.yaml<\/code> and summarized below where relevant.<\/p>\n<p>When real use of the candidates is found then it will be come official smart data models in the usual repositories. WE are trying to help adoption of open standards but only when the standards are actually used.<\/p>\n<h2 id=\"by-the-numbers\">By the numbers<\/h2>\n<table>\n<thead>\n<tr>\n<th><\/th>\n<th><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Source standards translated<\/td>\n<td><strong>29<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Candidate data models<\/td>\n<td><strong>385<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Largest single standard<\/td>\n<td>Gaia-X Ontology (165 models)<\/td>\n<\/tr>\n<tr>\n<td>Standards from the EDINT data space<\/td>\n<td>20<\/td>\n<\/tr>\n<tr>\n<td>Domains touched<\/td>\n<td>Smart Cities, Transportation, Energy, Environment, Cloud\/Data Spaces, Cross-Sector Manufacturing, Building<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"the-full-list\">The full list<\/h2>\n<h3 id=\"smart-cities-urban-infrastructure-edint-data-space\">Smart cities &amp; urban infrastructure (EDINT data space)<\/h3>\n<p>The bulk of recent growth comes from systematically translating the <strong>EDINT<\/strong> (Espacio de Datos para las Infraestructuras Urbanas Inteligentes) family of ontologies \u2014 20 standards covering nearly every domain a Spanish local government manages.<\/p>\n<table>\n<thead>\n<tr>\n<th>Standard<\/th>\n<th>Models<\/th>\n<th>What it covers<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><code>edint-infraestructura<\/code><\/td>\n<td>19<\/td>\n<td>Municipal facilities, sensors, observations, violations, traffic incidents, control\/measuring equipment, regulated zones<\/td>\n<\/tr>\n<tr>\n<td><code>edint-alumbrado-publico<\/code><\/td>\n<td>12<\/td>\n<td>Public street lighting: posts, luminaires, lamps, control centers, energy consumption<\/td>\n<\/tr>\n<tr>\n<td><code>edint-trafico<\/code><\/td>\n<td>7<\/td>\n<td>Standalone traffic ontology: street sections, incidents, control\/measuring equipment, observations<\/td>\n<\/tr>\n<tr>\n<td><code>edint-vehiculos-compartidos<\/code><\/td>\n<td>7<\/td>\n<td>Shared-mobility vehicles, stations, docks, routes and waypoints<\/td>\n<\/tr>\n<tr>\n<td><code>edint-catastro<\/code><\/td>\n<td>6<\/td>\n<td>The Spanish Cadastre: parcels, properties, constructions, references, renovations<\/td>\n<\/tr>\n<tr>\n<td><code>edint-aparcamiento<\/code><\/td>\n<td>5<\/td>\n<td>On-street and off-street parking, fees, spots, spot groupings<\/td>\n<\/tr>\n<tr>\n<td><code>edint-censo-locales<\/code><\/td>\n<td>5<\/td>\n<td>Commercial premises census: spaces, entities, permits, terraces, aggregations<\/td>\n<\/tr>\n<tr>\n<td><code>edint-fotovoltaica<\/code><\/td>\n<td>5<\/td>\n<td>Photovoltaic systems, meters, generation observations, contracts, rates<\/td>\n<\/tr>\n<tr>\n<td><code>edint-suministro<\/code><\/td>\n<td>5<\/td>\n<td>Utility supply points, meters, consumption, contracts, rates<\/td>\n<\/tr>\n<tr>\n<td><code>edint-gestion-residuos<\/code><\/td>\n<td>4<\/td>\n<td>Waste collection points (mobile &amp; permanent), containers, management facilities<\/td>\n<\/tr>\n<tr>\n<td><code>edint-medio-ambiente<\/code><\/td>\n<td>3<\/td>\n<td>Generic environmental sensor platforms, sensors and observations<\/td>\n<\/tr>\n<tr>\n<td><code>edint-censo-vehiculos<\/code><\/td>\n<td>2<\/td>\n<td>Vehicle registry and access\/parking permits<\/td>\n<\/tr>\n<tr>\n<td><code>edint-promocion-comercial<\/code><\/td>\n<td>2<\/td>\n<td>Commercial promotion campaigns and events<\/td>\n<\/tr>\n<tr>\n<td><code>edint-servicios-publicos<\/code><\/td>\n<td>2<\/td>\n<td>Public services and their administrative procedures (CPSV-AP)<\/td>\n<\/tr>\n<tr>\n<td><code>edint-agenda<\/code><\/td>\n<td>1<\/td>\n<td>City events published in municipal public agendas<\/td>\n<\/tr>\n<tr>\n<td><code>edint-contaminacion-acustica<\/code><\/td>\n<td>1<\/td>\n<td>Noise pollution observations<\/td>\n<\/tr>\n<tr>\n<td><code>edint-oferta-inmobiliaria<\/code><\/td>\n<td>1<\/td>\n<td>Real estate listings (sale, rent, transfer)<\/td>\n<\/tr>\n<tr>\n<td><code>edint-organizaciones<\/code><\/td>\n<td>1<\/td>\n<td>Spanish public administration organizations and org charts<\/td>\n<\/tr>\n<tr>\n<td><code>edint-zona-regulatoria<\/code><\/td>\n<td>1<\/td>\n<td>Regulated zones (low-emission, parking, pedestrian, historical center, &#8230;)<\/td>\n<\/tr>\n<tr>\n<td><code>edint-turismo<\/code><\/td>\n<td>11<\/td>\n<td>SEGITTUR&#8217;s Core Tourism Ontology: accommodation, historical\/cultural resources<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 id=\"cross-sector-building\">Cross-sector &amp; building<\/h3>\n<table>\n<thead>\n<tr>\n<th>Standard<\/th>\n<th>Models<\/th>\n<th>What it covers<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><code>cityjson-v2<\/code><\/td>\n<td>33<\/td>\n<td>All 33 CityJSON v2.0.2 City Object types: buildings, bridges, tunnels, transportation, vegetation, water, land use<\/td>\n<\/tr>\n<tr>\n<td><code>brick-schema<\/code><\/td>\n<td>10<\/td>\n<td>Building automation\/IoT metadata: points, equipment, and their relationships<\/td>\n<\/tr>\n<tr>\n<td><code>gaiax-ontology-v2111<\/code><\/td>\n<td>165<\/td>\n<td>Gaia-X Trust Framework: cloud\/infrastructure offerings, connectivity metrics, legal\/compliance\/credential vocabulary<\/td>\n<\/tr>\n<tr>\n<td><code>untp-v0.8.0<\/code><\/td>\n<td>2<\/td>\n<td>UN Transparency Protocol Digital Product Passport and Product<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 id=\"transportation\">Transportation<\/h3>\n<table>\n<thead>\n<tr>\n<th>Standard<\/th>\n<th>Models<\/th>\n<th>What it covers<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><code>era-rinf<\/code><\/td>\n<td>38<\/td>\n<td>ERA Register of Infrastructure: EU rail network topology, tracks, signalling, electrification<\/td>\n<\/tr>\n<tr>\n<td><code>era-evr<\/code><\/td>\n<td>14<\/td>\n<td>ERA European Vehicle Register: individual authorised rail vehicles<\/td>\n<\/tr>\n<tr>\n<td><code>era-eradis<\/code><\/td>\n<td>14<\/td>\n<td>ERA document\/certification register<\/td>\n<\/tr>\n<tr>\n<td><code>era-eratv<\/code><\/td>\n<td>8<\/td>\n<td>ERA European Register of Authorised Vehicle Types<\/td>\n<\/tr>\n<tr>\n<td><code>madrid-accidentes-trafico<\/code><\/td>\n<td>1<\/td>\n<td>Madrid City traffic accident records<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"a-few-things-worth-knowing-before-you-build-on-these\">A few things worth knowing before you build on these<\/h2>\n<ul>\n<li><strong>License status varies.<\/strong> Most EDINT candidates are CC-BY-4.0 (matching Smart Data Models&#8217; own convention); a handful of others (<code>edint-infraestructura<\/code>, <code>edint-turismo<\/code>, <code>edint-zona-regulatoria<\/code>) are CC-BY-SA-4.0 from their source and haven&#8217;t been reconciled yet. <code>madrid-accidentes-trafico<\/code>&#8216;s license isn&#8217;t stated in its source at all. Check each standard&#8217;s <code>licenseNote<\/code> before using it beyond evaluation.<\/li>\n<li><strong>A few entity names collide across standards.<\/strong> Because several EDINT ontologies independently reference the same real-world concepts (a regulated zone, a vehicle, a parking facility, an organization, a cadastral property, a &#8220;permit&#8221;), more than one candidate defines an NGSI-LD type with the same name but a different property set. Each collision is documented in the relevant <code>standard-metadata.yaml<\/code> \u2014 most likely resolution is consolidating on the fuller, more authoritative definition once these move past Candidate status.<\/li>\n<li><strong>Every translation favors real, sourced data over invented examples<\/strong> wherever the original specification provided any \u2014 actual open datasets, published sample instances, or real government records, not synthetic placeholders, whenever available.<\/li>\n<\/ul>\n<h2 id=\"browse-and-tell-us-whats-missing\">Browse, and tell us what&#8217;s missing<\/h2>\n<p>\ud83d\udc49 <strong><a href=\"https:\/\/github.com\/smart-data-models\/Candidates\">smart-data-models\/Candidates<\/a><\/strong><\/p>\n<p>Each standard&#8217;s directory under <code>standards\/<\/code> has its own <code>standard-metadata.yaml<\/code> with full translation notes, scope decisions, and known caveats. Open an issue or send a PR if you spot something worth fixing before promotion.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is just a summary for the participants of the FIWARE global summit 2026. See you there in Menton. Smart Data Models&#8217; Candidates repository has grown a lot over the past few weeks. This post is a single roundup of everything in it today: 29 source standards, translated into 385&#8230; <a class=\"continue-reading-link\" href=\"https:\/\/smartdatamodels.org\/index.php\/state-of-the-candidates-repository-29-standards-385-data-models\/\">More&#8230;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[84],"tags":[],"class_list":["post-41633","post","type-post","status-publish","format-standard","hentry","category-governance"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":39748,"url":"https:\/\/smartdatamodels.org\/index.php\/39748\/","url_meta":{"origin":41633,"position":0},"title":"European Union Agency for Railways (ERA) available in the candidates repository","author":"maestro","date":"12\/08\/2026","format":false,"excerpt":"Smart Data Models' Candidates repository now includes four new candidate standards translated from the European Union Agency for Railways (ERA) Ontology v3.3.3 \u2014 the shared data model behind the EU's four railway interoperability registers. Together they bring 74 entity types covering the physical rail network, authorised rolling stock, certification records,\u2026","rel":"","context":"In &quot;SmartLogistics&quot;","block_context":{"text":"SmartLogistics","link":"https:\/\/smartdatamodels.org\/index.php\/category\/smartlogistics\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/smartdatamodels.org\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_1ddht51ddht51ddh-300x300.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":40343,"url":"https:\/\/smartdatamodels.org\/index.php\/gaia-x-ontology-joins-smart-data-models-165-candidate-models-for-cloud-connectivity-trust\/","url_meta":{"origin":41633,"position":1},"title":"Gaia-X Ontology Joins Smart Data Models: 165 Candidate Models for Cloud, Connectivity &#038; Trust","author":"maestro","date":"20\/08\/2026","format":false,"excerpt":"Smart Data Models' Candidates repository now includes a new candidate standard, gaiax-ontology-v2111, translated from the Gaia-X ontology v2111 \u2014 the vocabulary behind Self-Descriptions in Gaia-X federated data spaces and cloud ecosystems. All 165 classes published at docs.gaia-x.eu\/ontology\/v2111\/classes now have an NGSI-LD \/ NGSI-v2 representation. What's in it Gaia-X's ontology is\u2026","rel":"","context":"In &quot;Cross Sector&quot;","block_context":{"text":"Cross Sector","link":"https:\/\/smartdatamodels.org\/index.php\/category\/cross-sector\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/smartdatamodels.org\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_3gnhx13gnhx13gnh-300x300.jpeg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":38306,"url":"https:\/\/smartdatamodels.org\/index.php\/introducing-the-smart-data-models-candidates-repository\/","url_meta":{"origin":41633,"position":2},"title":"Introducing the Smart Data Models Candidates Repository","author":"Agent","date":"22\/07\/2026","format":false,"excerpt":"The Smart Data Models now has a Candidates repository \u2014 a low-friction entry point where any existing standard, ontology or open dataset can be translated into the SDM shape (JSON Schema + NGSI-LD context + examples) before anyone commits to the full contribution process. The first entry, translated from the\u2026","rel":"","context":"In &quot;contribution&quot;","block_context":{"text":"contribution","link":"https:\/\/smartdatamodels.org\/index.php\/category\/contribution\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/smartdatamodels.org\/wp-content\/uploads\/2026\/07\/Gemini_Generated_Image_38hkfh38hkfh38hk-300x164.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/smartdatamodels.org\/wp-content\/uploads\/2026\/07\/Gemini_Generated_Image_38hkfh38hkfh38hk-300x164.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/smartdatamodels.org\/wp-content\/uploads\/2026\/07\/Gemini_Generated_Image_38hkfh38hkfh38hk-300x164.png?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":40895,"url":"https:\/\/smartdatamodels.org\/index.php\/cityjson-ciutygml-joins-smart-data-models-33-candidate-models-for-3d-city-objects\/","url_meta":{"origin":41633,"position":3},"title":"CityJSON\/ciutyGML Joins Smart Data Models: 33 Candidate Models for 3D City Objects","author":"maestro","date":"31\/08\/2026","format":false,"excerpt":"Smart Data Models' Candidates repository now includes a new candidate standard, cityjson-v2, translated from CityJSON v2.0.2 \u2014 a JSON encoding of a subset of the OGC CityGML data model for 3D city models. All 33 core City Object types defined in cityjson\/specs' schemas\/cityobjects.schema.json now have an NGSI-LD \/ NGSI-v2 representation.\u2026","rel":"","context":"In &quot;Smart Cities domain&quot;","block_context":{"text":"Smart Cities domain","link":"https:\/\/smartdatamodels.org\/index.php\/category\/smart-cities\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":40911,"url":"https:\/\/smartdatamodels.org\/index.php\/untp-digital-product-passport-joins-smart-data-models-date-2026-09-04-categories-announcements-candidates-sustainability-supplychain-tags-untp-digitalproductpassport-verifiablecredential\/","url_meta":{"origin":41633,"position":4},"title":"UNTP Digital Product Passport Joins Smart Data Models:  Two new candidate models \u2014 DigitalProductPassport and Product","author":"maestro","date":"01\/09\/2026","format":false,"excerpt":"Smart Data Models' Candidates repository now includes a new candidate standard, untp-v0.8.0, translated from the UN Transparency Protocol (UNTP) Digital Product Passport specification \u2014 a B2B data standard, issued as a W3C Verifiable Credential, for carrying product and sustainability information through supply chains. Two entities are covered: DigitalProductPassport and Product.\u2026","rel":"","context":"In &quot;Cross Sector&quot;","block_context":{"text":"Cross Sector","link":"https:\/\/smartdatamodels.org\/index.php\/category\/cross-sector\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":32325,"url":"https:\/\/smartdatamodels.org\/index.php\/besser-smart-data-json-schema-generator\/","url_meta":{"origin":41633,"position":5},"title":"BESSER Smart Data JSON Schema Generator","author":"maestro","date":"27\/02\/2026","format":false,"excerpt":"Overview The tool automates the generation of Smart Data Models (SDM) from visual models, bridging the gap between high-level domain design and technical implementation for Digital Twins and IoT ecosystems. 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