rdf_rdfa_attributes($mapping, $data = NULL)
Builds an array of RDFa attributes for a given mapping.
This array will typically be passed through Drupal\Core\Template\Attribute to create the attributes variables that are available to template files. These include $attributes, $title_attributes, $content_attributes and the field-specific $item_attributes variables.
Parameters
array $mapping: An array containing a mandatory 'properties' key and optional 'datatype', 'datatype_callback' and 'type' keys. For example:
1 2 3 4 5 6 7 8 9 10 | array( 'properties' => array('schema:interactionCount'), 'datatype' => 'xsd:integer', 'datatype_callback' => array( 'callable' => 'Drupal\rdf\SchemaOrgDataConverter::interactionCount', 'arguments' => array( 'interaction_type' => 'UserComments' ), ),); |
mixed $data: (optional) A value that needs to be converted by the provided callback function.
Return value
array RDFa attributes suitable for Drupal\Core\Template\Attribute.
Related topics
- RDF Mapping API
- Functions to describe entities and bundles in RDF.
File
- core/modules/rdf/rdf.module, line 167
- Enables semantically enriched output for Drupal sites in the form of RDFa.
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | function rdf_rdfa_attributes($mapping, $data = NULL) { $attributes = array(); // The type of mapping defaults to 'property'. $type = isset($mapping['mapping_type']) ? $mapping['mapping_type'] : 'property'; switch ($type) { // The mapping expresses the relationship between two resources. case 'rel': case 'rev': $attributes[$type] = $mapping['properties']; break; // The mapping expresses the relationship between a resource and some // literal text. case 'property': if (!empty($mapping['properties'])) { $attributes['property'] = $mapping['properties']; // Convert $data to a specific format as per the callback function. if (isset($data) && !empty($mapping['datatype_callback'])) { $callback = $mapping['datatype_callback']['callable']; $arguments = isset($mapping['datatype_callback']['arguments']) ? $mapping['datatype_callback']['arguments'] : NULL; $attributes['content'] = call_user_func($callback, $data, $arguments); } if (isset($mapping['datatype'])) { $attributes['datatype'] = $mapping['datatype']; } break; } } return $attributes;} |
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