Format Conversion Example

RDF format conversion utilities using @unrdf/cli.

Features

• Convert between RDF formats (Turtle, N-Triples, N-Quads, TriG, JSON-LD)
• Auto-detect input format from file extension
• Validate RDF syntax
• Display format information
• Support multiple input/output formats

Installation

pnpm install

Usage

Convert Formats

# Auto-detect input format
node src/index.mjs convert data/input.ttl --output data/output.nt

# Specify formats explicitly
node src/index.mjs convert data/input.ttl --output data/output.nt --from turtle --to ntriples

# Convert to JSON-LD
node src/index.mjs convert data/input.ttl --output data/output.jsonld --to jsonld

Validate RDF

# Auto-detect format
node src/index.mjs validate data/example.ttl

# Specify format
node src/index.mjs validate data/example.ttl --format turtle

Format Information

# Get format details
node src/index.mjs info turtle

# List all supported formats
node src/index.mjs formats

Supported Formats

| Format | Extensions | Description | |--------|-----------|-------------| | turtle | .ttl, .turtle | Turtle syntax | | ntriples | .nt, .ntriples | N-Triples syntax | | nquads | .nq, .nquads | N-Quads syntax | | trig | .trig | TriG syntax | | jsonld | .jsonld, .json | JSON-LD syntax |

API

detectFormat(filepath)

Auto-detect RDF format from file extension.

parseRDF(content, format)

Parse RDF content into quads.

serializeRDF(quads, format)

Serialize quads to RDF format.

convertFormat(content, inputFormat, outputFormat)

Convert RDF from one format to another.

validateRDF(content, format)

Validate RDF syntax.

Testing

pnpm test

Examples

Convert Turtle to N-Triples

import { convertFormat } from './src/converter.mjs';

const turtle = '<http://ex.org/s> <http://ex.org/p> "o" .';
const ntriples = await convertFormat(turtle, 'turtle', 'ntriples');
console.log(ntriples);

Validate RDF File

import { readFileSync } from 'fs';
import { validateRDF } from './src/converter.mjs';

const content = readFileSync('data.ttl', 'utf-8');
const isValid = await validateRDF(content, 'turtle');
console.log(isValid ? 'Valid' : 'Invalid');