function hook_rdf_namespaces in Drupal 9

Same name and namespace in other branches

1. 8 core/modules/rdf/rdf.api.php \hook_rdf_namespaces()
2. 7 modules/rdf/rdf.api.php \hook_rdf_namespaces()

Allow modules to define namespaces for RDF mappings.

Many common namespace prefixes are defined in rdf_rdf_namespaces(). However, if a module implements rdf mappings that use prefixes that are not defined in rdf_rdf_namespaces(), this hook should be used to define the new namespace prefixes.

Return value

string[] An associative array of namespaces where the key is the namespace prefix and the value is the namespace URI.

Related topics

3 functions implement hook_rdf_namespaces()

Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.

rdf_conflicting_namespaces_rdf_namespaces in core/modules/rdf/tests/rdf_conflicting_namespaces/rdf_conflicting_namespaces.module

Implements hook_rdf_namespaces().

rdf_rdf_namespaces in core/modules/rdf/rdf.module

Implements hook_rdf_namespaces().

rdf_test_namespaces_rdf_namespaces in core/modules/rdf/tests/rdf_test_namespaces/rdf_test_namespaces.module

Implements hook_rdf_namespaces().

1 invocation of hook_rdf_namespaces()

rdf_get_namespaces in core/modules/rdf/rdf.module

Retrieves RDF namespaces.

File

core/modules/rdf/rdf.api.php, line 27

Hooks provided by the RDF module.

Code

function hook_rdf_namespaces() {
  return [
    'content' => 'http://purl.org/rss/1.0/modules/content/',
    'dc' => 'http://purl.org/dc/terms/',
    'foaf' => 'http://xmlns.com/foaf/0.1/',
    'og' => 'http://ogp.me/ns#',
    'rdfs' => 'http://www.w3.org/2000/01/rdf-schema#',
    'sioc' => 'http://rdfs.org/sioc/ns#',
    'sioct' => 'http://rdfs.org/sioc/types#',
    'skos' => 'http://www.w3.org/2004/02/skos/core#',
    'xsd' => 'http://www.w3.org/2001/XMLSchema#',
  ];
}