The OTA_HotelInvCountNotifRQ message is used to communicate room level inventory values to client systems. Each message contains inventory for one or more room types for one hotel for one channel. 

The ARI Sync - Hurdle (OTA) is used to set the status for an inventory block, a rate plan, or an inventory code.

The ARI Sync-Inventory (HTNG) is used to notifiy a booking source of the inventory amount available at a specific hotel property.

The ARI Sync -  Inventory (OTA) is used to notify a booking source of the inventory amount available at a specific hotel property.

The CancelReservations method provides the ability to send reservation cancellation requests.

The Cancel Reservations Notification method provides the ability to send cancellation notification requests.

The CreateReservations method provides the ability to send reservation requests to SynXis CR.

The Create Reservations Notification method is virtually identical to the Create Reservations method is used to include a confirmation number to identify the reservation, as well as the full details of the reservation. 

The CRS Reservation Delivery (HTNG) (OTA_HotelResNotifRQ) is used to communicate reservation data from SynXis CRS to a 3rd party system on behalf of a hotel (i.e. PMS, RMS, CRM, etc).

The Data Warehouse Reservation Delivery (OTA_HotelResNotifRQ) API is used to deliver a near-real-time feed of a chain's reservation transactions for use by a customer's data warehouse. 

The Get Room Inventory Count (OTA_HotelInvCountRQ) API provides the ability to request all room counts by room type and date.

The Modify Reservation (OTA_HotelResModifyRQ) is used to enable modifications of previously booked reservations.

The Modify Reservation Notification(OTA_HotelResModifyNotifRQ) is used to enable modifications of a previously booked reservations.

The PMS Reservation Sync (HTNG) (OTA_HotelResNotifRQ) API is used to communicate reservation data from a PMS to SynXis CRS.

The Read Reservations method using the OTA_ReadRQ message enables reservation records to be retrieved from the system by passing identifying information. If an exact reservation match is not found or a list is requested, the OTA_HotelResRS message is returned with a list of reservations.

Each reservation cancellation retrieved must be updated as a Success or Error in the SynXis CRS. The OTA_CancelRQ message is used to update only one retrieved reservation cancellation.

Each reservation modification retrieved must be updated as a Success or Error in the SynXis CRS. The OTA_HotelResModifyNotifRQ message is used to update one or more retrieved reservation modification and must include the SynXis CRS Confirmation Number.

Each new reservation retrieved must be updated as a Success or Error in the SynXis CR. The OTA_HotelResNotifRQ message is used to update one or more retrieved new reservations.

The OTA_HotelGetMsg is used to request reservations in the SynXis CRS and the response is used to return the pending reservations.

The OTA_Cancel message will be used to communicate the cancellation of reservation data from SynXis CRS to a hotel. Each reservation message will contain one reservation for a single hotel.

The OTA_HotelResModifyNotif message will be used to communicate modifications to reservation data from SynXis CRS to a hotel. Each reservation message will contain one reservation for a single hotel.

The OTA_HotelResNotifRQ message will be used to communicate reservation data from SynXis CRS to a hotel. Each reservation message will contain one reservation for a single hotel.