@prefix euc: <https://555eucriders.com/ns/euc#>

555 Linked Data

A machine-readable layer for EUC knowledge.

555 EUCRiders publishes structured data for electric unicycle models, terminology, and software resources in formats that can be reused by search engines, apps, research tools, and future semantic integrations.

This release treats the portal as both a readable publication and a reusable knowledge layer. The core building blocks are schema:ProductModel, schema:DefinedTerm, schema:SoftwareApplication, dcat:Dataset, and a lightweight euc: namespace.

Open models dataset View ontology

Resources

# Public endpoints

The current release covers the EUC specs database, the dictionary, and the app catalog. Each resource is published with a stable URI, predictable format, and catalog entry.

Data catalog

Top-level machine-readable catalog for everything published by 555 EUCRiders.

JSON-LD

Open catalog.jsonld

EUC models dataset

Canonical electric unicycle model specifications built from the codebase dataset.

JSON-LD

Open euc-models.jsonld

EUC models export

RDF-native serialization of the same model graph for graph workflows.

Turtle

Open euc-models.ttl

EUC ontology draft

Lightweight ontology namespace for EUC-specific classes and properties.

Turtle

Open ontology

Dictionary dataset

Canonical EUC terms, aliases, frequencies, categories, and related-term mappings.

JSON-LD

Open dictionary.jsonld

Dictionary export

RDF-native Turtle serialization of the dictionary graph.

Turtle

Open dictionary.ttl

Apps dataset

Curated EUC software applications, dashboards, wearables, and developer tools.

JSON-LD

Open apps.jsonld

Apps export

RDF-native Turtle serialization of the software catalog.

Turtle

Open apps.ttl

Articles dataset

Canonical editorial graph covering wheel reviews, gear guides, and insights articles.

JSON-LD

Open articles.jsonld

Articles export

RDF-native Turtle serialization of the editorial article graph.

Turtle

Open articles.ttl

Comparisons dataset

Canonical graph for curated EUC model comparisons, search intents, and verdict metadata.

JSON-LD

Open comparisons.jsonld

Comparisons export

RDF-native Turtle serialization of curated EUC comparison entities.

Turtle

Open comparisons.ttl

Public API

# Flat JSON for apps, bots, and community tooling.

The linked-data graph remains the canonical semantic layer. The public JSON API exposes the same high-value data in a simpler shape for Discord bots, scripts, spreadsheet imports, and lightweight community integrations.

API index

Discovery document listing the public JSON endpoints and their linked-data sources.

Open index.json

EUC models API

Flat JSON export of model specs, provenance, source confidence, aliases, use cases, and known issues.

Open euc-models.json

Comparisons API

Curated model-vs-model comparison metadata with intent, verdict, deciding factors, and related queries.

Open euc-comparisons.json

OpenAPI document

Machine-readable API contract for tooling, code generators, monitors, and future developer docs.

Open openapi.json

.well-known discovery

Stable discovery pointer for external agents and crawlers that need the API catalog location.

Open discovery JSON

Use it

# Quick ways to work with the data.

The goal is not only to publish URIs, but to make them immediately usable for scripts, knowledge graphs, parsers, and future API clients.

Request JSON-LD explicitly

curl -H "Accept: application/ld+json" \
  https://555eucriders.com/linked-data/euc-models.jsonld

Use the flat public API

curl https://555eucriders.com/api/euc-models.json

Sample response shape

{
  "@context": {
    "@vocab": "https://schema.org/",
    "dcat": "http://www.w3.org/ns/dcat#",
    "euc": "https://555eucriders.com/ns/euc#"
  },
  "@graph": [
    {
      "@id": "https://555eucriders.com/linked-data/euc-models.jsonld#dataset",
      "@type": ["Dataset", "dcat:Dataset"],
      "name": "555 EUCRiders EUC Models Dataset"
    }
  ]
}

SPARQL-style intent

SELECT ?model ?brand ?speed
WHERE {
  ?model a euc:EUCModel ;
         schema:brand ?brand ;
         schema:speed ?speed .
}
ORDER BY DESC(?speed)

A public SPARQL endpoint is not live yet. The query block is here to document the intended graph shape and query ergonomics.

Provenance

# Publisher, versioning, and rights.

The catalog now exposes publisher, modified date, version, and license reference in the machine-readable layer. This page mirrors the same metadata for humans.

Publisher
555 EUCRiders
Version
2026-06-05
Last modified
2026-06-05
Namespace
https://555eucriders.com/ns/euc#
Source provenance
Manufacturer specifications, distributor listings, editorial curation, and community verification.

Current scope

# What is already modeled.

The current graph covers enough surface area to be practically useful today while still leaving room for deeper relationship modeling in later phases.

  • Canonical dataset for electric unicycle models and specifications
  • JSON-LD for web-native integrations
  • Turtle for RDF and graph workflows
  • Controlled wheel class vocabulary for reuse across pages and tools
  • Canonical dictionary terms with aliases and related-term links
  • SoftwareApplication nodes for rider apps, dashboards, and dev tools
  • Canonical editorial article entities with about and mentions links

Namespace draft: https://555eucriders.com/ns/euc#