Sparql Cliente

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Alberto Soki

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Apr 20, 2023, 8:07:00 AM4/20/23

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Hi everyone, I'm using ontop CLI (https://ontop-vkg.org/tutorial/interact/cli.html) to do Sparql queries. I would like to redo this example using the \EasyRdf\Sparql\Client:

POST http://localhost:8080/sparql

Content-Type: application/sparql-query

Accept: application/json PREFIX : <http://example.org/voc#> SELECT DISTINCT ?teacher { ?teacher a :Teacher . }

I tried as follows using \EasyRdf\Sparql\Client:

\EasyRdf\RdfNamespace::set('fo','http://www.w3.org/1999/XSL/Format#');
\EasyRdf\RdfNamespace::set('','http://example.org/voc');
\EasyRdf\RdfNamespace::set('foaf', 'http://xmlns.com/foaf/0.1/');

$sparql = new \EasyRdf\Sparql\Client('http://localhost:8080/sparql');

//$sparql = \EasyRdf\Http\Client::setHeaders('accept', 'application/json');

$result = $sparql->query(
'SELECT ?title WHERE {
?x a :ServiceProfile ; :serviceTitle ?title
}'
);

dd($result);

But I'm getting an empty query and I haven't even found a way to add headers. Does anyone have a solution for this?

EasyRdf\Sparql\Result {#284 ▼ -type: "bindings" -boolean: null -fields: array:1 [▼ 0 => "title" ] -parseState: [] -storage: [] flag::STD_PROP_LIST: false flag::ARRAY_AS_PROPS: false }