RDF-Ext

RDF Interfaces Spec

• defines objects for nodes, triples and graphs
• defines interfaces for parsers and serializers

RDF-Ext Spec

• defines extended interfaces for asynchronous parsers and serializers
• defines a store interface to handle named graphs

Overview

RDF-Ext Package - RDF Interfaces

RDF-Ext comes with the RDF Interfaces reference implementation

RDF-Ext Package - Parsers

• JSON-LD using jsonld.js
• Turtle using N3.js
• N-Triples
• RDF/XML based on rdflib.js
• Microformats/RDFa based on Green Turtle

RDF-Ext Package - Serializers

• JSON-LD using jsonld.js
• Turtle using N3.js
• N-Triples

RDF-Ext Package - Stores

• InMemory
• Linked Data Platform / Web
• SPARQL

How do you query data in JavaScript without concatenating strings to SPARQL queries?

Clownface graph traversing

• Gremlin inspired
• simple API for graph and store traversing
• synchronous API for graphs
• Promise API for stores on graph border crossing

Clownface example

var cf = rdf.cf.Store(store);

cf.node('http://localhost:8080/data/person/bernadette-rostenkowski', null, function (cf) {
  cf
    .out('http://schema.org/knows')
    .jump(function (cf) {
      return cf.map(function (node) {
        return node.out('http://schema.org/givenName') + ' ' + node.out('http://schema.org/familyName');
      });
    })
    .then(function (result) {
        alert(result.join(','));
    });
});
						

• start in <bernadette-rostenkowski>
• search for all objects with predicate <knows>
• jump into the named graphs
• build full name string