legrand/sparql

Library that generate SPARQL queries and request a endpoints

dev-master 2015-01-12 21:47 UTC

Requires

• php: >=5.3.0
• phpunit/phpunit: 3.7.*@dev

MIT

• Damien Legrand

• Semantic Web
• sparql

README

A library that generate SPARQL queries and request a endpoints

Exemple

A quick and easy sparql request to understand how it works. You can find more exemples in the SparqlTest.php file.

    $sparql = new Legrand\SPARQL;

    $sparql->variable('?z')
           ->where('<http://dbpedia.org/resource/Nine_Inch_Nails>', '?y', '?z')
           ->limit(20);

    $response = $sparql->launch();

Methods

• prefixe($namespace, $url) You can add several prefixes with this method
• distinct($boolean) Set a request with a distinct select
• variable($var) Add a variable to select i.e. ?z
• from($graph) Add a from graph i.e. http://graph
• where($subject, $predicate, $object) add a where condition
• optionalWhere($subject, $predicate, $object) add a conditional where condition
• optionalWhereComplexe($sparql) add a more complex conditional where in the query
• union($sparql) define where condition on a SPARQL object and give it to this method
• filter($filter) add a filter inside the where brackets
• orderBy($order) define the order i.e. ?z DESC
• limit($nb) define the limit
• offset($nb) define the offset
• insert($graph) create an insert sparql query by giving the graph uri
• delete($graph) create a delete sparql query by giving the graph uri
• getSPARQL() get the SPARQL query without calling the endpoint

Defaults

Some attributes are set with defaults value. You can of course change these values :

• $sparql->baseUrl = 'http://dbpedia.org/sparql';
• $sparql->format = 'json';
• $sparql->method = 'GET';
• $sparql->queryParam = 'query';
• $sparql->formatParam = 'format';