ALL SCHEMA FILES IN THE OPENTRAVEL ALLIANCE SPECIFICATION ARE MADE AVAILABLE ACCORDING TO THE TERMS DEFINED BY THE OPENTRAVEL LICENSE AGREEMENT AT http://www.opentravel.org/Specifications/Default.aspx. The OTA_HotelInvNotifRQ is the message that sends the notification of a new inventory item, such as a room type or service type created for the hotel that did not previously exist. A collection of Sellable products for a given hotel. The code that uniquely identifies a single hotel property. The hotel code is decided between vendors. The code that uniquely identifies a single hotel property in the supplier's system.