 
  {:db/id #db/id[:db.part/db]
   :db/ident :stop/url
+  :db/index true
   :db/valueType :db.type/string
   :db/cardinality :db.cardinality/one
   :db.install/_attribute :db.part/db}
 
  {:db/id #db/id[:db.part/db] ; TODO: might update to enum
   :db/ident :stop/location-type
+  :db/index true
   :db/valueType :db.type/long
   :db/cardinality :db.cardinality/one
   :db.install/_attribute :db.part/db}
 
  {:db/id #db/id[:db.part/db]
   :db/ident :stop/parent-station
+  :db/index true
   :db/valueType :db.type/string
   :db/cardinality :db.cardinality/one
   :db.install/_attribute :db.part/db}


 {:db/id #db/id[:db.part/db]
  :db/ident :stop/longitude
  :db/valueType :db.type/double
  :db/cardinality :db.cardinality/one
  :db/doc "The stop_lon field contains the longitude of a stop or station. The field value must be a valid WGS 84 longitude value from -180 to 180."


 {:db/id #db/id[:db.part/db]
  :db/ident :agency/timezone
  :db/index true
  :db/valueType :db.type/string
  :db/cardinality :db.cardinality/one
  :db/doc "The agency_timezone field contains the timezone where the transit agency is located. Timezone names never contain the space character but may contain an underscore. Please refer to http://en.wikipedia.org/wiki/List_of_tz_zones for a list of valid values. If multiple agencies are specified in the feed, each must have the same agency_timezone."
