 
  {:db/id #db/id[:db.part/db]
   :db/ident :stop/latitude
+  :db/index true
   :db/valueType :db.type/double
   :db/cardinality :db.cardinality/one
   :db/doc "The stop_lat field contains the latitude of a stop or station. The field value must be a valid WGS 84 latitude."


 {:db/id #db/id[:db.part/db]
  :db/ident :route/agency
  :db/valueType :db.type/ref
  :db/cardinality :db.cardinality/one
  :db/doc "The agency_id field defines an agency for the specified route. This value is referenced from the agency.txt file. Use this field when you are providing data for routes from more than one agency."


 {:db/id #db/id[:db.part/db]
  :db/ident :agency/lang
  :db/index true
  :db/valueType :db.type/string
  :db/cardinality :db.cardinality/one
  :db/doc "The agency_lang field contains a two-letter ISO 639-1 code for the primary language used by this transit agency. The language code is case-insensitive (both en and EN are accepted). This setting defines capitalization rules and other language-specific settings for all text contained in this transit agency's feed. Please refer to http://www.loc.gov/standards/iso639-2/php/code_list.php for a list of valid values."
