Availability is used to update Stay Restrictions to the SynXis CR. This message is used to communicate updates to: Hotel, Room, Rate, Product, Rate Category, Sell Limit, Sell Threshold and Open/Close stay restrictions.

The ARI Sync- Availability (OTA) (OTA_HotelBookingRuleNotifRQ) is used to limit the availability for a hotel.

The OTA_HotelInvBlockNotifRQ may be used to send a notification of one or more new inventory blocks. This message may also be used to modify or cancel one or more existing inventory blocks.

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 ARI Sync - Rates ( HTNG) is used to communicate the creation of new rate plans and modification of existing rate plans for one hotel for one rate plan.

The ARI Sync-Rates (OTA) is used to provide a notification of a new rate plan created for a hotel, and to synchronize the rate plan between systems for booking.

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 Hotel Descriptive Content Sync API (OTA_HotelDescriptiveContentNotifRQ) is used to communicate hotel-level information to SynXis CRS.

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

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.