All Schema files in the OTA specification are made available according to the terms defined by the OTA License Agreement at http://www.opentravel.org/ota_downloads_form.cfm The package availability request message handles pre, post, and inclusive package availability requests for a given sailing. Point of sale object. Collection of guest information. Specifies the guest information. Specifies the fare code and the group code if any. Fare codes are specific to cruise lines. Selected guest mode of transportation. Specifies guest quantity and guest types. Specify guest numbers and types. Categorization of all guests in the request. The sum of the Quantity attribute will provide you with the total number of guests. Contains information related to the selected sailing. Specifies the type of package options of interest. Used to further qualify the package availability search. A reference to a specific reservation which may limit the available packages. The standard attributes that appear on the root element for all OTA payloads. Provides the echo token to be used to retrieve additional records.