/**
* Convert an array of RDF quads to a JSON-LD document
*
* Usage:
*
* $document = JsonLD::fromRdf($quads);
* print(JsonLD::toString($document, true));
*
* It is possible to configure the conversion process by setting the options
* parameter accordingly. Available options are:
*
* <dl>
* <dt>base</dt>
* <dd>The base IRI of the input document.</dd>
*
* <dt>useNativeTypes</dt>
* <dd>If set to true, native types are used for <em>xsd:integer</em>,
* <em>xsd:double</em>, and <em>xsd:boolean</em>; otherwise,
* typed strings will be used instead.</dd>
*
* <dt>useRdfType</dt>
* <dd>If set to true, <em>rdf:type</em> will be used instead of <em>@type</em>
* </dl>
*
* The options parameter might be passed as associative array or as
* object.
*
* @param Quad[] $quads Array of quads.
* @param null|array|object $options Options to configure the expansion
* process.
*
* @return array The JSON-LD document in expanded form.
*
* @throws InvalidQuadException If an invalid quad was detected.
* @throws JsonLdException If converting the quads to a JSON-LD document failed.
*
* @api
*/
public static function fromRdf(array $quads, $options = null)
{
$options = self::mergeOptions($options);
$processor = new Processor($options);
return $processor->fromRdf($quads);
}