function rdfx_rdf_namespaces in RDF Extensions 7.2

Implements hook_rdf_namespaces.

File

./rdfx.terms.inc, line 54

Functions for managing RDF Terms.

Code

function rdfx_rdf_namespaces() {

  // Starts with some additionnal common namespaces which core does not include.
  $ns_mappings = array(
    'owl' => 'http://www.w3.org/2002/07/owl#',
    'rdf' => 'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
    'rss' => 'http://purl.org/rss/1.0/',
    // url() does not support empty fragment.
    'site' => url('ns', array(
      'absolute' => TRUE,
    )) . '#',
  );

  // Gets the custom namespaces stored in the database.
  $query = db_select('rdfx_vocabulary_graphs', 'g');
  $query
    ->fields('n', array(
    'prefix',
    'uri',
  ));
  $query
    ->join('rdfx_namespaces', 'n', 'g.main_ns = n.nsid');
  $query
    ->orderBy('n.prefix');
  $namespaces = $query
    ->execute()
    ->fetchAllKeyed();
  foreach ($namespaces as $prefix => $uri) {
    $ns_mappings[$prefix] = $uri;
  }
  return $ns_mappings;
}