Nominatim/settings/phrase_settings.php

<?php

// These settings control the import of special phrases from the wiki.

// class/type combinations to exclude
$aTagsBlacklist
 = array(
    'boundary' => array('administrative'),
    'place' => array('house', 'houses'),
   );

// If a class is in the white list then all types will
// be ignored except the ones given in the list.
// Also use this list to exclude an entire class from
// special phrases.
$aTagsWhitelist
 = array(
    'highway' => array('bus_stop', 'rest_area', 'raceway'),
    'building' => array(),
   );