' . t('The JSON-LD module serializes entities to the JSON-LD data format. To request JSON-LD instead of HTML, a client should add an Accept header to the request. This module will respond with JSON-LD if the Accept header value is one of the following: application/ld+json, which returns an easy-to-use data structure which is compatible with many external schemas, and application/vnd.drupal.ld+json, which is more expressive and is appropriate for content staging.', array( '@jsonld_org' => 'http://json-ld.org/', )) . '

'; return $output; } }