| AlternateLocationInfo | Specifies alternate location(s) for the origin and/or destination. |
 ArrivalDateTime | The arrival date and optionally a time period that can be applied before and/or after the arrival date.Specifies a time window. |
| ConnectionLocations | Travel Connection Location - for example, air uses the IATA 3 letter code.To specify connection locations, preference level for each, min connection time, and whether location is specified for stopping or changing. |
| DepartureDateTime | The departure date and optionally a time period that can be applied before and/or after the departure date.Specifies a time window. |
| DestinationLocation | Travel Destination Location - for example, air uses the IATA 3 letter code. |
| OriginLocation | Travel Origin Location - for example, air uses the IATA 3 letter code. |
| TPA_Extensions | A placeholder in the schema to allow for additional elements and attributes to be included per Trading Partner Agreement (TPA).Allows extensions to be added to the OpenTravel specification per trading partner agreement. |