@rdfjs/serializer-jsonld
JSON-LD serializer that implements the RDF/JS Sink interface.
Usage
The package exports the serializer as a class, so an instance must be created before it can be used.
The .import method, as defined in the RDF/JS specification, must be called to do the actual serialization.
It expects a quad stream as argument.
The method will return a stream which emits the JSON-LD as a plain object or string.
The constructor accepts an options object with the following optional keys:
-
encoding: Defines the encoding of the output. Supported encodings arestringandobject. By defaultobjectis used.
It's also possible to pass options as second argument to the .import method.
The options from the constructor and the .import method will be merged together.
Example
This example shows how to create a serializer instance and how to feed it with a stream of quads. The object emitted by the serializer will be written to the console.
import rdf from '@rdfjs/data-model'
import { Readable } from 'readable-stream'
import SerializerJsonld from '@rdfjs/serializer-jsonld'
const serializerJsonld = new SerializerJsonld()
const input = new Readable({
objectMode: true,
read: () => {
input.push(rdf.quad(
rdf.namedNode('http://example.org/sheldon-cooper'),
rdf.namedNode('http://schema.org/givenName'),
rdf.literal('Sheldon')))
input.push(rdf.quad(
rdf.namedNode('http://example.org/sheldon-cooper'),
rdf.namedNode('http://schema.org/familyName'),
rdf.literal('Cooper')))
input.push(rdf.quad(
rdf.namedNode('http://example.org/sheldon-cooper'),
rdf.namedNode('http://schema.org/knows'),
rdf.namedNode('http://example.org/amy-farrah-fowler')))
input.push(null)
}
})
const output = serializerJsonld.import(input)
output.on('data', jsonld => {
console.log(jsonld)
})