array( 'predicates' => array('foo:rev'), 'type' => 'rev', ), 'field_notrev' => array( 'predicates' => array('foo:rel'), 'type' => 'rel', ), ); db_insert('rdf_mapping') ->fields(array( 'type', 'bundle', 'mapping', )) ->values(array( 'type' => 'node', 'bundle'=> 'rev_test', 'mapping' => serialize($rev_mapping), )) ->execute(); // Alter the stored mapping for articles. $altered_mapping = array( 'rdftype' => array('foo:Type'), 'field_image' => array( 'predicates' => array('foo:image'), ), ); db_update('rdf_mapping') ->fields(array( 'type' => 'node', 'bundle'=> 'article', 'mapping' => serialize($altered_mapping), )) ->condition('type', 'node') ->condition('bundle', 'article') ->execute();