3. $ git clone https://github.com/webr3/js3.git
$ git checkout origin/rdfa-api-integration
<script type=”text/javascript” src=”js3.js”></script>
var js3 = require(‘./js3.node.js’);

6. var context = new rdfapi.Context();
var parser = new rdfapi.parsers.Turtle(context);
var serializer = new rdfapi.serializers.Turtle(context);
var turtle_text = ‘@prefix ex: <http://example.com/people/> .¥
@prefix foaf: <http://xmlns.com/foaf/0.1/> .¥
¥
ex:taro a foaf:Person;¥
foaf:name “Taro”;¥
foaf:age 25 .’;
parser.parse(turtle_text, function(graph){
console.log(serializer.serialize(graph));
});

7. parser.parse(turtle_text, function(graph){
graph.forEach(function(triple){ // show each triples
console.log(triple.toString());
})
graph.add(triple2); // add a triple to the graph
// use filter
var filter = rdfapi.filters.p(“owl:sameAs”);
graph.some(filter);
graph.every(filter);
graph.filter(filter);
graph.merge(other_graph);
});

10. var taro = {
a: “foaf:Person”,
name: “Taro Yamada”,
age: new Date().getFullYear() - 1984,
homepage: “http://example.com/home/taro”
}.ref(“http://example.com/rdf/taro”);
console.log(taro.n3());

11. var taro = {
a: “foaf:Person”,
name: “Taro Yamada”,
age: new Date().getFullYear() - 1984,
homepage: “http://example.com/home/taro”
}.ref(“http://example.com/rdf/taro”);
console.log(taro.n3());

12. var taro = {
a: “foaf:Person”,
name: “Taro Yamada”,
age: new Date().getFullYear() - 1984,
homepage: “http://example.com/home/taro”
}.ref(“http://example.com/rdf/taro”);
console.log(taro.n3());

13. var taro = {
a: “foaf:Person”,
name: “Taro Yamada”,
age: new Date().getFullYear() - 1984,
homepage: “http://example.com/home/taro”
}.ref(“http://example.com/rdf/taro”);
console.log(taro.n3());

14. var taro = {
a: “foaf:Person”,
name: “Taro Yamada”,
age: new Date().getFullYear() - 1984,
homepage: “http://example.com/home/taro”
}.ref(“http://example.com/rdf/taro”);
console.log(taro.n3());
↓

15. var taro = {
a: “foaf:Person”,
name: “Taro Yamada”,
age: new Date().getFullYear() - 1984,
homepage: “http://example.com/home/taro”
}.ref(“http://example.com/rdf/taro”);
console.log(taro.n3());
↓
<http://example.com/rdf/taro> rdf:type foaf:Person;
foaf:name “Taro Yamada”;
foaf:age 27;
foaf:homepage <http://example.com/home/taro> .

18. // TypedLiteral .type IRI ( CURIE )
(true).type; //=> xsd:boolean
(new Date()).type; //=> xsd:dateTime
(10).type; //=> xsd:integer
(3.14).type; //=> xsd:decimal
// .nodeType() TypedLiteral, PlainLiteral, BlankNode, IRI
(10).nodeType(); //=> TypedLiteral
“hello”.nodeType(); //=> PlainLiteral
“_:b12”.nodeType(); //=> BlankNode
“foaf:name”.nodeType(); //=> IRI
“http://example.com/”.nodeType(); //=> IRI

19. // foaf:name 2
var me1 = { “foaf:nick”: [“nick”, “name”] }.ref();
// RDF List
var me2 = { “foaf:nick”: [“nick”, “name”].toList() }.ref();

20. var taro = {
name: “Taro”,
holdsAccount: {
accountName: ‘xxx’,
homepage: ‘http://twitter.com/xxx’,
}
}.ref(“:taro”);
var jiro = { “foaf:knows”: taro }.ref(“:jiro”);

21. var me = { name: “Taro”, age: 27 }.ref(“:me”);
console.log(typeof me.age); //=> number
console.log((new Date()).getFullYear() - me.age); //=> 1984
console.log(me.name.toUpper()); //=> “TARO”

22. // parsing by rdfapi.js
parser.parse(“SOME RDF STRING”, function(graph){
var data = {
a: “foaf:Document”,
...,
}.ref(“:book”);
graph.merge(data.graphify()); //
});