README
¶
Trigo
A high-performance RDF triplestore and SPARQL 1.1 query engine written in Go
Overview
Trigo is a modern RDF triplestore inspired by Oxigraph, implementing efficient storage and querying of RDF data using SPARQL. Built in Go, it provides a simple, maintainable codebase with excellent performance characteristics.
Key Features
- Full SPARQL 1.1 Support - SELECT, CONSTRUCT, ASK, DESCRIBE queries with advanced patterns (OPTIONAL, UNION, MINUS, GRAPH, BIND)
- Multiple RDF Formats - Turtle, N-Triples, N-Quads, TriG, RDF/XML, JSON-LD parsers
- Efficient 11-Index Architecture - BadgerDB backend with optimal index selection
- HTTP SPARQL Endpoint - W3C SPARQL 1.1 Protocol compliant with interactive web UI
- Named Graphs Support - Full quad store with graph-level operations
- High Performance - xxHash3 encoding, query optimization, lazy evaluation
Quick Start
Installation
# Clone the repository
git clone https://github.com/aleksaelezovic/trigo.git
cd trigo
# Build the CLI
go build -o trigo ./cmd/trigo
Start SPARQL Endpoint
# Start the server
./trigo serve
# Visit http://localhost:8080/ for the interactive web UI
Query via HTTP
curl -X POST http://localhost:8080/sparql \
-H 'Content-Type: application/sparql-query' \
-H 'Accept: application/sparql-results+json' \
-d 'SELECT ?s ?p ?o WHERE { ?s ?p ?o } LIMIT 10'
Use as a Library
import (
"github.com/aleksaelezovic/trigo/pkg/store"
"github.com/aleksaelezovic/trigo/pkg/rdf"
)
storage, _ := storage.NewBadgerStorage("./data")
ts := store.NewTripleStore(storage)
triple := rdf.NewTriple(
rdf.NewNamedNode("http://example.org/alice"),
rdf.NewNamedNode("http://xmlns.com/foaf/0.1/name"),
rdf.NewLiteral("Alice"),
)
ts.InsertTriple(triple)
Documentation
📚 Full Documentation - Complete guides and API reference
- Quick Start Guide - Get started in minutes
- Architecture - Deep dive into design and implementation
- HTTP API Reference - REST API documentation
- Testing & Compliance - W3C test suite results
Test Results
Validated against official W3C test suites:
RDF 1.1 Parsers (Perfect Compliance!)
- RDF N-Triples: 100% (70/70 tests) ✅
- RDF N-Quads: 100% (87/87 tests) ✅
- RDF Turtle: 100% (296/296 tests) ✅
- RDF TriG: 100% (335/335 tests) ✅
- RDF/XML: 100% (166/166 tests) ✅
🎉 RDF 1.1 Total: 100% (954/954 tests) — Full W3C Compliance Achieved!
RDF 1.2 Parsers (Near-Perfect Compliance)
- RDF 1.2 N-Triples: 99.3% (139/140 tests) — 1 C14N canonicalization test
- RDF 1.2 N-Quads: 99.4% (154/155 tests) — 1 C14N canonicalization test
- RDF 1.2 Turtle: 100% (388/388 tests) ✅
- RDF 1.2 TriG: 99.7% (395/396 tests) — 1 test skipped
- RDF 1.2 RDF/XML: 100% (196/196 tests) ✅
🚀 RDF 1.2 Total: 99.8% (1,272/1,275 tests) — 3 tests remaining
Combined RDF Compliance
Overall: 99.9% (2,226/2,229 tests) — Excellent W3C Compliance! 🎉
SPARQL Query Engine
- Overall SPARQL: 74.4% (574/772 tests) — Combining SPARQL 1.0 + 1.1
- SPARQL 1.0: 99.2% (467/471 tests) — 4 tests remaining
- SPARQL 1.1: 35.5% (107/301 tests) — Many features implemented
SPARQL 1.0 (Near-Perfect):
- Perfect Suites (15): distinct, boolean-effective-value, expr-builtin, expr-ops, bound, cast, reduced, regex, solution-seq, sort, triple-match, type-promotion, bnode-coreference, syntax-sparql5, ask ✅
- Remaining: 4 edge case tests (date comparison, GRAPH+OPTIONAL, complex optional semantics)
SPARQL 1.1 (Growing Support):
- construct: 100% (7/7 tests) ✅ — Full CONSTRUCT WHERE support
- bind: 80.0% (8/10 tests) — BIND clause with expressions
- csv-tsv-res: 83.3% (5/6 tests) — CSV and TSV result formats
- Not yet implemented: Aggregates, GROUP BY, Property Paths, Subqueries, VALUES clause, UPDATE operations
See Testing & Compliance for detailed breakdown.
Project Structure
trigo/
├── cmd/ # CLI applications
├── internal/ # Internal packages (encoding, storage, testing)
├── pkg/ # Public API (rdf, store, sparql, server)
└── docs/ # Documentation site
See the Architecture Guide for details.
Contributing
Contributions are welcome! Please:
- Check existing issues or create a new one
- Follow the existing code style
- Run tests and quality checks before submitting
- Update documentation as needed
License
Apache License 2.0 - See LICENSE for details
Acknowledgments
Inspired by Oxigraph architecture. Built with BadgerDB and xxHash3.
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