This guide serves as a comprehensive resource for comparing GDS formats across various systems, including Travelport+, Worldspan, Apollo, and Amadeus. It outlines the basic functions, encoding and decoding processes, and flight management features within Smartpoint. The document details the functionalities available in Smartpoint Flex windows, such as managing multiple PNRs, utilizing search options for hotel, car, and air availability, and executing direct sells. It also explains how to encode and decode information for cities, airlines, countries, and companies across different GDS platforms. Additionally, the guide provides specific commands for managing flight availability, including requests for specific classes, carriers, and journey times. The structured approach ensures users can easily navigate through the various functionalities and commands necessary for efficient GDS operations.