clarification text - Robuta Search

https://www.turkishairlines.com/ar-sa/legal-notice/privacy-policy/processing-of-identity-passport-information/

Turkish Airlines Protection of Personal Data Announcement for the Processing of Identity/Passport Information

https://www.mail-archive.com/community@apache.org/msg04010.html

https://dblp.org/rec/journals/ipm/BlairM90.html

Bibliographic details on Full-text information retrieval: Further analysis and clarification.