get_items() Query by Dublin Core Meta fields

I am looking for a way to query a set of items in my theme using the "Relation" Dublin Core field. Is it possible to do so with the get_items() function, or do I have to write some custom SQL to do so?

I'm new to Omeka, so if it's possible, I would greatly appreciate a code sample.

There's no exact helper or function for doing this, but this should work:

$elementId = get_db()->getTable('Element')->findByElementNameAndSetName('Dublin Core', 'Relation');
$params = array('advanced' =>
              array('element_id' => $elementId,
                    'type' => 'contains'
                    'terms' => /* your search term */
              )
          );
$items = get_items($params);

The example code I posted before is wrong in a bunch of respects, so here's a new, better one:

$elementId = get_db()->getTable('Element')->findByElementNameAndSetName('Dublin Core', 'Relation')->id;
$params = array('advanced_search' =>
              array(
                  array('element_id' => $elementId,
                        'type' => 'contains'
                        'terms' => /* your search term */
                  )
              )
          );
$items = get_items($params);