jsonld-rapper

Convert between RDF and JSON-LD using rapper

Installation

This module requires the rapper utility, version >=2.0.14 to be in $PATH.

If it isn't in the $PATH, override rapperBinary.

Based on https://github.com/ruby-rdf/rdf-raptor:

% [sudo] port install raptor             # Mac OS X with MacPorts
% [sudo] fink install raptor-bin         # Mac OS X with Fink
% brew install raptor                    # Mac OS X with Homebrew
% [sudo] apt-get install raptor2-utils   # Ubuntu / Debian with apt-get
% [sudo] yum install raptor2             # Fedora / CentOS / RHEL
% [sudo] zypper install raptor           # openSUSE
% [sudo] emerge raptor                   # Gentoo Linux
% [sudo] pacman -S raptor                # Arch Linux
% [sudo] pkg_add -r raptor               # FreeBSD
% [sudo] pkg_add raptor                  # OpenBSD / NetBSD

Install dependencies: npm install

Test: npm test

Generate docs in apidocs: npm run docs

Example

var JsonLD2RDF = require('jsonld-rapper')
 
var j2r = new JsonLD2RDF();
 
var jsonld1 = {'@id': 'http://example.org/foo', 'http://example.org/prop1': 'bar'};
var turtle1 = {'@prefix ex: <http://example.org/> .\n ex:foo ex:prop1 "bar" .'
 
j2r.convert(turtle1, 'turtle', 'jsonld', function (err, asJsonLD) {
  // do something with asJsonLD, an object
});
 
j2r.convert(jsonld1, 'jsonld', 'rdfxml', function (err, asRdfxml) {
  // do something with asRdfxml, a string
});

API

Exports

• JsonLD2RDF: Class with the convert method

Options

• rapperBinary: Absolute path or $PATH-relative path to the rapper(1) binary
• baseURI: TODO
• expandContext: TODO
• profile: JSON-LD profile to use when outputting JSON-LD
• jsonldToRDF: Options passed to jsonld.toRDF. Defaults:
  • baseURI: Instance's baseURI
  • expandContext: Instance's expandContext
  • format: 'application/nquads'. Since the jsonld module supports only nquads, don't change this.
• jsonldFromRDF: Options passed to jsonld.fromRDF. Defaults
  • format: 'application/nquads'. Since the jsonld module supports only nquads, don't change this.
  • useRdfType: false
  • useNativeTypes: false
• jsonldCompact, jsonldExpand, jsonldFlatten: Options passed to jsonld's resp. function

Convert

var JsonLD2RDF = require('jsonld-rapper');
var j2r = new JsonLD2RDF();
j2r.convert(input, from, to, methodOpts, callback)

• input: string of RDF/JSON-LD or JSON-LD object
• from: One of the supported input media types or short names
• to: One of the supported output media types or short names
• methodOpts (OPTIONAL): Options to override the instance-wide options
• callback: Callback, gets passed (err, converted) where err is an error object (including a cause field for errors from rapper) and converted is the converted RDF/JSON-LD string/object.

Constants

Properties of the JsonLD2RDF instance

• SUPPORTED_INPUT_TYPE: Supported input types used as the from argument
• SUPPORTED_OUTPUT_TYPE: Supported output types used as the from argument
• JSONLD_PROFILE: Supported JSON-LD profiles

var JsonLD2RDF = require('jsonld-rapper');
var j2r = new JsonLD2RDF();
for (profile in j2r.JSONLD_PROFILE) {
  console.log profile
}
// COMPACTED =>    'http://www.w3.org/ns/json-ld#compacted'
// FLATTENED =>    'http://www.w3.org/ns/json-ld#flattened'
// FLATTENED_EXPANDED =>   'http://www.w3.org/ns/json-ld#flattened+expanded'
// EXPANDED =>     'http://www.w3.org/ns/json-ld#expanded'

Rights

This library is licensed under the terms of the MIT license.

Library	License
async	MIT
colors	MIT
merge	MIT
jsonld	BSD 3-Clause
n3	MIT
which	ISC
which	MIT