Added fare_attributes to trips object

Author: schnuerle

data-types.md

@@ -215,6 +215,7 @@ A Trip is defined by the following structure:
 | `trip_duration`          | Integer         | Required               | Time, in Seconds |
 | `trip_distance`          | Integer         | Required               | Trip Distance, in Meters |
 | `trip_attributes`        | Map             | Optional               | **[Mode](/modes#list-of-supported-modes) Specific**. [Trip attributes](/modes#trip-attributes) given as unordered key-value pairs |
+| `fare_attributes`        | Map             | Optional               | **[Mode](/modes#list-of-supported-modes) Specific**. [Fare attributes](/modes#fare-attributes) given as unordered key-value pairs |
 | `start_time`             | [Timestamp][ts] | Required               | Start of the passenger/driver trip |
 | `end_time`               | [Timestamp][ts] | Required               | End of the passenger/driver trip |
 | `start_location`         | [Point](point)  | Required               | Location of the start of the trip. See also [Stop-based Geographic Data][stop-based-geo]. |

modes/README.md

@@ -60,6 +60,12 @@ The `trip_attributes` array allows additional mode-specific information about th
 
 _See more available trip attributes for any mode in the [trips endpoint](/provider#trips)._
 
+### Fare Attributes
+
+The `fare_attributes` array allows additional mode-specific information about fare information associated with the trip. It can return a list of JSON-formatted key/value pairs which correspond to the allowed attributes and values for the operative mode. See each [mode definition](#list-of-supported-modes) for details.
+
+_See more available fare attributes for any mode in the [trips endpoint](/provider#trips)._
+
 ### Vehicle Attributes
 
 The `vehicle_attributes` array returns a list of JSON-formatted key/value pairs which correspond to the allowed attributes and values for the operative mode. For each mode, the allowed attributes and corresponding values are defined in the [mode definition](#list-of-supported-modes).