🎼 Trackloaded Dataset – RDF & SPARQL Access

The Trackloaded Linked Open Data dataset provides machine-readable metadata about Nigerian music artists and labels. Data is published as RDF, Turtle, JSON-LD, and accessible via a live SPARQL endpoint.

🔗 Access Points

• SPARQL Endpoint: /sparql-endpoint.php
• SPARQL Browser (UI): /sparql-browser
• VoID Metadata (Turtle): /?void=1
• RDF Sitemap (Turtle): /?build_rdf_sitemap

📄 Per-Entity Linked Data

Each artist or label tag page supports RDF export via query parameters:

• ?rdf=ttl or ?format=ttl – Turtle
• ?rdf=xml or ?format=xml – RDF/XML
• ?rdf=json or ?format=json – JSON

Example URLs:

• /tag/olamide/?rdf=ttl (artist)
• /tag/ybnl/?rdf=ttl (label)

📦 Embedded JSON-LD

Each profile page includes inline application/ld+json structured data using Schema.org:

• Artists: Person
• Labels: MusicGroup

💡 Example SPARQL Queries

All Artists

PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX schema: <https://schema.org/>

SELECT ?name ?url ?dob ?aka ?bio
WHERE {
  ?x a foaf:Person ;
     foaf:name ?name ;
     foaf:homepage ?url .
  OPTIONAL { ?x schema:birthDate ?dob }
  OPTIONAL { ?x schema:alternateName ?aka }
  OPTIONAL { ?x foaf:bio ?bio }
}
  

All Labels

PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX mo: <http://purl.org/ontology/mo/>
PREFIX schema: <https://schema.org/>

SELECT ?name ?url ?founded ?hq
WHERE {
  ?x a mo:MusicGroup ;
     foaf:name ?name ;
     foaf:homepage ?url .
  OPTIONAL { ?x schema:foundingDate ?founded }
  OPTIONAL { ?x schema:location ?hq }
}
  

Artists under Each Label

PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX mo: <http://purl.org/ontology/mo/>

SELECT ?label ?artist
WHERE {
  ?x a mo:MusicGroup ;
     foaf:name ?label ;
     mo:member ?artist .
}
  

Label Founders

PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX schema: <https://schema.org/>
PREFIX mo: <http://purl.org/ontology/mo/>

SELECT ?label ?founder
WHERE {
  ?x a mo:MusicGroup ;
     foaf:name ?label ;
     schema:founder ?founder .
}
  

📚 Vocabularies Used

• foaf:name, foaf:homepage, foaf:bio
• schema:birthDate, schema:founder, schema:location
• mo:member – Music Ontology
• owl:sameAs – External identity links

📜 License

This dataset is made available under the Creative Commons Attribution 4.0 License (CC BY 4.0) .