 
  {:db/id #db/id[:db.part/db]
   :db/ident :route/agency
+  :db/index true
   :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 :trip/shape
  :db/valueType :db.type/ref
  :db/cardinality :db.cardinality/one
  :db/doc "The shape_id field contains an ID that defines a shape for the trip. This value is referenced from the shapes.txt file. The shapes.txt file allows you to define how a line should be drawn on the map to represent a trip."


 {:db/id #db/id[:db.part/db]
  :db/ident :trip/frequency
  :db/index true
  :db/valueType :db.type/ref
  :db/isComponent true
  :db/cardinality :db.cardinality/many
