Annex B: Variables collected by e-Borders Code:
document_type - To facilitate entry and exit linkage
document_number (encrypted using a substitution cipher) - To facilitate entry and exit linkage
country of issue - To facilitate entry and exit linkage
date_of_issue - Needed as a marker for building a person-centric travel history
date_of_expiration - Needed as a marker for building a person-centric travel history
last_name* - To facilitate entry and exit linkage and development of person-centric travel histories
first_name* - To facilitate entry and exit linkage and development of person-centric travel histories
second_name* - To facilitate entry and exit linkage and development of person-centric travel histories
Gender - Key demographic variable, to facilitate entry and exit linkage and development of person-centric travel histories
date_of_birth - Key demographic variable, to facilitate entry and exit linkage and development of person-centric travel histories
nationality - Key demographic variable
flight_code - Useful for validating country of departure
flight_departure_datetime - Needed for date referencing
arrival_airport - Needed to analyse flows by country
departure_airport - Needed to analyse flows by country
port_of_embark - Needed to analyse flows by country. Proxy data for flows by UK region (for UK departures)
port_of_disembark - Needed to analyse flows by country. Proxy data for flows by UK region (for UK arrivals)
arrival_datetime - Need to determine length of stay between entry and exit events
