User interface, system and method for performing a web-based transaction

A system configured for searching for a combination of at least two different entities

• contained in web-based data sources, the system comprising a search engine established for extraction of data stored in at least two different web-based data sources, said search engine being implemented by means of at least one computer,
• the at least one computer comprising one or more central processing units, one or more memories and one or more network interfaces to one or more networks,
• the at least one computer further comprising a search engine comprising program code which, when executed on said one or more central processing units performs a search on the basis of user inputted search criteria,
• said system furthermore comprising a user interface adapted so that a user can enter said search criteria,
• said system being configured for operating such that the system establishes a transaction configured by at least one set of entities, at least two of said entities being accessible via web-servers, at least one set of entities comprising at least two entities accessible via different web servers,
• establishes at least one query based on user inputted search criteria, said query comprising a set of desired entities,
• searches in at least two of the web-servers for entities matching the desired entities, and
• presents at least one of the found set of entities to a user by means of a user interface.