@tpluscode/rdf-string

@tpluscode/rdf-string

Simplifies the construction of RDF strings (turtle, n-triples, SPARQL, etc.) by taking care of correctly serializing values to their string representation and automatically prefixing URIs.

Usage

The heart of the library are EcmaScript template string tag functions. All values interpolated values are serialized according to the syntactic rules of the given RDF format.

Formats which support prefixes will automatically abbreviate the URIs and return the prefix declarations according to the specific syntax.

SPARQL

import * as RDF from '@rdfjs/data-model' 
import { prefixes } from '@zazuko/rdf-vocabuleries'
import namespace from '@rdfjs/namespace'

import { sparql } from '@zazuko/rdf-string'

const person = RDF.variable('person')
const PersonType = RDF.namedNode('http://example.com/Person')
const schema = namespace(prefixes.schema)
const name = "John"

const query = sparql`SELECT * WHERE {
  ${person} a ${PersonType} .
  ${person} ${schema.name} ${name} .
}`

query.toString()

The last line will return a complete query.

PREFIX schema: <http://schema.org/>

SELECT * WHERE {
  ?person a <http://example.com/Person> .
  ?person schema:name "John" .
}

turtle

TBD

n-triples

TBD

Changelog

0.2.1 (2020-02-25)

Features

• turtle: defaultGraph is serialized with option for named (1f087c1)
• turtle initial version (fc83c08)

Bug Fixes

• sparql: remove superfluous blank lines added in head (d4b5f0f)