The hotel.de/hotel.info FreeHotelWebService is a free XML SOAP interface that allows you to connect directly to the HOTEL INFO hotel search facility. Users of this service simply have to register as an Affiliate with HOTEL INFO.
To use this hotel search facility, you must implement your own user interface (UI). Users then use this UI to query and retrieve all the relevant data through the web application interface. This means that the HOTEL INFO hotel search facility can easily be integrated into existing applications.