Passenger name record is the name for a set of data in a database, which contains the path a passenger travelling with one or more airlines takes. In some cases, groups of people travelling together are stored in the same passenger name record. Passenger details often contain more information than that which is strictly necessary. Additional information stored includes the gender of the passenger, if the passenger is part of a frequent flyer programme, details about the ticket, or if the passenger has special meal requirements - for example vegetarian.